Document:

<PAGE>   1
                                                                     Exhibit 4.4
                                                                  Conformed Copy

                       AMERICAN HOME PRODUCTS CORPORATION

                                 $3,000,000,000

                              5 7/8% NOTES DUE 2004
                              6 1/4% NOTES DUE 2006
                              6.70% NOTES DUE 2011

                   EXCHANGE AND REGISTRATION RIGHTS AGREEMENT

                                                                  March 30, 2001

Chase Securities Inc.
Salomon Smith Barney Inc.
    As Representatives of the several
    Initial Purchasers
c/o Chase Securities Inc.
270 Park Avenue, 4th floor
New York, New York  10017

Ladies and Gentlemen:

        American Home Products Corporation, a Delaware corporation (the
"COMPANY"), proposes to issue and sell to the several Initial Purchasers listed
in Schedule 1 to the Purchase Agreement (the "INITIAL PURCHASERS"), upon the
terms and subject to the conditions set forth in a purchase agreement dated
March 27, 2001 between the Company and the Initial Purchasers (the "PURCHASE
AGREEMENT"), $500,000,000 aggregate principal amount of its 5 7/8 % Notes Due
2004 (the "2004 NOTES"), $1,000,000,000 aggregate principal amount of its
6 1/4% Notes Due 2006 (the "2006 NOTES") and $1,500,000,000 aggregate principal
amount of its 6.70 % Notes Due 2011 (the "2011 NOTES"; and together with the
2004 Notes and the 2006 Notes, the "NOTES"). Capitalized terms used but not
defined herein shall have the meanings given to such terms in the Purchase
Agreement.

<PAGE>   2

        As an inducement to the Initial Purchasers to enter into the Purchase
Agreement and in satisfaction of a condition to the obligations of the Initial
Purchasers thereunder, the Company agrees with the Initial Purchasers, for the
benefit of the holders (including the Initial Purchasers) of the Notes, the
Exchange Notes (as defined herein) and the Private Exchange Notes (as defined
herein) (collectively, the "HOLDERS"), as follows:

        1. Registered Exchange Offer. The Company shall (i) prepare and, not
later than 90 calendar days following the date of original issuance of the
Notes (the "CLOSING DATE"), use its reasonable best efforts to file with the
Commission a registration statement (the "EXCHANGE OFFER REGISTRATION
STATEMENT") on an appropriate form under the Securities Act with respect to a
proposed offer to the Holders of the Notes (the "REGISTERED EXCHANGE OFFER") to
issue and deliver to such Holders, in exchange for the Notes, debt securities
of the Company (the "EXCHANGE NOTES") that have the same aggregate principal
amount as the tendered Notes and that are identical in all material respects to
the tendered Notes, except for the transfer restrictions relating to the Notes,
(ii) use its reasonable best efforts to cause the Exchange Offer Registration
Statement to become effective under the Securities Act no later than 180
calendar days after the Closing Date and the Registered Exchange Offer to be
consummated no later than 210 calendar days after the Closing Date and (iii)
keep the Exchange Offer Registration Statement effective for not less than 30
calendar days (or longer, if required by applicable law) after the date on
which notice of the Registered Exchange Offer is mailed to the Holders (such
period being called the "EXCHANGE OFFER REGISTRATION PERIOD"). The Exchange
Notes will be issued as separate series of debt securities under a supplemental
indenture (the "SUPPLEMENTAL INDENTURE") dated as of the date hereof, between
the Company and The Chase Manhattan Bank (successor to Manufacturers Hanover
Trust Company), as trustee (the "TRUSTEE"). The Supplemental Indenture relates
to an indenture dated as of April 10, 1992, as amended on October 13, 1992,
between the Company and the Trustee (the "BASE INDENTURE", and as further
amended and supplemented by the Supplemental Indenture, the "INDENTURE").

        Upon the effectiveness of the Exchange Offer Registration Statement, the
Company shall promptly commence the Registered Exchange Offer, it being the
objective of such Registered Exchange Offer to enable each Holder electing to
exchange Notes for Exchange Notes (assuming that such Holder (a) is not an
affiliate of the Company or a Participating Broker-Dealer (as defined herein)
not complying with the requirements of the next sentence, (b) is not an Initial
Purchaser holding Notes that have, or that are reasonably likely to have, the
status of an unsold allotment in an initial distribution, (c) acquires the
Exchange Notes in the ordinary course of such Holder's business and (d) has no
arrangements or understandings with any person to participate in the
distribution of the Exchange Notes) and to trade such Exchange Notes from and
after their receipt without any limitations or restrictions under the Securities
Act and without material restrictions under the securities laws of the several
states of the United States.

                                       2
<PAGE>   3

The Company, the Initial Purchasers and each Participating Broker-Dealer
acknowledge that, pursuant to current interpretations by the Commission's staff
of Section 5 of the Securities Act, each Holder that is a broker-dealer electing
to exchange Notes, acquired for its own account as a result of market-making
activities or other trading activities, for Exchange Notes (a "PARTICIPATING
BROKER-DEALER"), is required to deliver a prospectus containing substantially
the information set forth in Annex A hereto on the cover, in Annex B hereto in
the "Exchange Offer Procedures" section and the "Purpose of the Exchange Offer"
section and in Annex C hereto in the "Plan of Distribution" section of such
prospectus in connection with a sale of any such Exchange Notes received by such
Participating Broker-Dealer pursuant to the Registered Exchange Offer.

        If, prior to the consummation of the Registered Exchange Offer, any
Holder holds any Notes acquired by it that have, or that are reasonably likely
to be determined to have, the status of an unsold allotment in an initial
distribution, or any Holder is not entitled to participate in the Registered
Exchange Offer, the Company shall, upon the request of any such Holder,
simultaneously with the delivery of the Exchange Notes in the Registered
Exchange Offer, issue and deliver to any such Holder, in exchange for the Notes
held by such Holder (the "PRIVATE EXCHANGE"), a like aggregate principal amount
of debt securities of the Company (the "PRIVATE EXCHANGE NOTES") that are
identical in all material respects to the Exchange Notes, except for the
transfer restrictions relating to such Private Exchange Notes. The Private
Exchange Notes will be issued under the same indenture as the Exchange Notes,
and the Company shall use its reasonable best efforts to cause the Private
Exchange Notes to bear the same CUSIP number as the Exchange Notes.

        In connection with the Registered Exchange Offer, the Company shall:

                (a) mail to each Holder a copy of the prospectus forming part of
        the Exchange Offer Registration Statement, together with an appropriate
        letter of transmittal and related documents;

                (b) keep the Registered Exchange Offer open for not less than 30
        calendar days (or longer, if required by applicable law) after the date
        on which notice of the Registered Exchange Offer is mailed to the
        Holders;

                (c) utilize the services of a depositary for the Registered
        Exchange Offer with an address in the Borough of Manhattan, The City of
        New York;

                (d) permit Holders to withdraw tendered Notes at any time prior
        to the close of business, New York City time, on the last business day
        on which the Registered Exchange Offer shall remain open; and

                (e) otherwise comply in all respects with all laws that are
        applicable to the Registered Exchange Offer.

                                       3
<PAGE>   4
        As soon as practicable after the close of the Registered Exchange Offer
and any Private Exchange, as the case may be, the Company shall:

                (a) accept for exchange all Notes tendered and not validly
        withdrawn pursuant to the Registered Exchange Offer and the Private
        Exchange;

                (b) deliver to the Trustee for cancellation all Notes so
        accepted for exchange; and

                (c) cause the Trustee promptly to authenticate and deliver to
        each Holder, Exchange Notes or Private Exchange Notes, as the case may
        be, equal in principal amount to the Notes of such Holder so accepted
        for exchange.

        The Company shall use its reasonable best efforts to keep the Exchange
Offer Registration Statement effective and to amend and supplement the
prospectus contained therein in order to permit such prospectus to be used by
all persons subject to the prospectus delivery requirements of the Securities
Act for such period of time as such persons must comply with such requirements
in order to resell the Exchange Notes; provided that (i) in the case where such
prospectus and any amendment or supplement thereto must be delivered by a
Participating Broker-Dealer, such period shall be the lesser of 180 calendar
days and the date on which all Participating Broker-Dealers have sold all
Exchange Notes held by them and (ii) the Company shall make such prospectus and
any amendment or supplement thereto available to any broker-dealer for use in
connection with any resale of any Exchange Notes for a period of not less than
90 calendar days after the consummation of the Registered Exchange Offer.

        The Indenture shall provide that the Notes, the Exchange Notes and the
Private Exchange Notes of a specified maturity shall vote and consent together
on all matters as one class where a class vote is required and that none of the
Notes, the Exchange Notes or the Private Exchange Notes of a specified maturity
will have the right to vote or consent as a separate class on any matter.

        Interest on each Exchange Note and Private Exchange Note issued pursuant
to the Registered Exchange Offer and in the Private Exchange will accrue from
the last interest payment date on which interest was paid on the Notes
surrendered in exchange therefor or, if no interest has been paid on the Notes,
from the date of original issuance of such Notes.

        Each Holder participating in the Registered Exchange Offer shall be
required to represent to the Company that at the time of the consummation of the
Registered Exchange Offer (i) any Exchange Notes received by such Holder will be
acquired in the ordinary course of business, (ii) such Holder will have no
arrangements or understanding with any person to participate in the distribution
of the Notes or the Exchange Notes within the meaning of the Securities Act and
(iii)

                                       4
<PAGE>   5

such Holder is not an affiliate of the Company or, if it is such an affiliate,
such Holder will comply with the registration and prospectus delivery
requirements of the Securities Act to the extent applicable.

        Notwithstanding any other provisions hereof, the Company will ensure
that (i) any Exchange Offer Registration Statement and any amendment thereto and
any prospectus forming part thereof and any supplement thereto complies in all
material respects with the Securities Act and the rules and regulations of the
Commission thereunder, (ii) any Exchange Offer Registration Statement and any
amendment thereto does not, when it becomes effective, contain an untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary to make the statements therein not misleading and
(iii) any prospectus forming part of any Exchange Offer Registration Statement,
and any supplement to such prospectus, does not, as of the consummation of the
Registered Exchange Offer, include an untrue statement of a material fact or
omit to state a material fact necessary in order to make the statements therein,
in the light of the circumstances under which they were made, not misleading.

        2. Shelf Registration. If (i) because of any change in law or applicable
interpretations thereof by the Commission's staff, the Company is not permitted
to effect the Registered Exchange Offer as contemplated by Section 1 hereof, or
(ii) the Registered Exchange Offer is not consummated within 210 calendar days
after the Closing Date, or (iii) within 90 days after the consummation of the
Registered Exchange Offer any Initial Purchaser so requests with respect to
Notes or Private Exchange Notes not eligible to be exchanged for Exchange Notes
in the Registered Exchange Offer and held by it following the consummation of
the Registered Exchange Offer, or (iv) any Holder that participates in the
Registered Exchange Offer does not receive freely transferable Exchange Notes in
exchange for tendered Notes (other than due solely to such Holder being an
affiliate of the Company or a Participating Broker-Dealer and not complying with
the prospectus delivery requirements of the second paragraph of Section 1
above), or (v) the Company so elects, then the following provisions shall apply:

        (b) The Company shall use its reasonable best efforts to file as
promptly as practicable (but in no event more than 45 calendar days after so
required or requested pursuant to this Section 2) with the Commission, and
thereafter shall use its reasonable best efforts to cause to be declared
effective, a shelf registration statement on an appropriate form under the
Securities Act relating to the offer and sale of the Transfer Restricted Notes
(as defined below) by the Holders thereof from time to time in accordance with
the methods of distribution set forth in such registration statement (hereafter,
a "SHELF REGISTRATION STATEMENT" and, together with any Exchange Offer
Registration Statement, a "REGISTRATION STATEMENT").

        (c) The Company shall use its reasonable best efforts to keep the Shelf
Registration Statement continuously effective in order to permit the prospectus
forming part thereof to be used by Holders of Transfer Restricted Notes for a

                                       5
<PAGE>   6

period ending on the earlier of (i) two years from the Closing Date or such
shorter period that will terminate when all the Transfer Restricted Notes
covered by the Shelf Registration Statement have been sold pursuant thereto and
(ii) the date on which the Notes become eligible for resale without volume
restrictions pursuant to Rule 144 under the Securities Act (in any such case,
such period being called the "SHELF REGISTRATION PERIOD"). The Company shall be
deemed not to have used its reasonable best efforts to keep the Shelf
Registration Statement effective during the requisite period if it voluntarily
takes any action that would result in Holders of Transfer Restricted Notes
covered thereby not being able to offer and sell such Transfer Restricted Notes
during that period, unless such action is required by applicable law.

        (d) Notwithstanding any other provisions hereof, the Company will ensure
that (i) any Shelf Registration Statement and any amendment thereto and any
prospectus forming part thereof and any supplement thereto complies in all
material respects with the Securities Act and the rules and regulations of the
Commission thereunder, (ii) any Shelf Registration Statement and any amendment
thereto (in either case, other than with respect to information included therein
in reliance upon or in conformity with written information furnished to the
Company by or on behalf of any Holder specifically for use therein (the
"HOLDERS' Information")) does not contain an untrue statement of a material fact
or omit to state a material fact required to be stated therein or necessary to
make the statements therein not misleading and (iii) any prospectus forming part
of any Shelf Registration Statement, and any supplement to such prospectus (in
either case, other than with respect to Holders' Information), does not include
an untrue statement of a material fact or omit to state a material fact
necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading.

        3. Liquidated Damages. (a) The parties hereto agree that the Holders of
Transfer Restricted Notes will suffer damages if the Company fails to fulfill
its obligations under Section 1 or Section 2, as applicable, and that it would
not be feasible to ascertain the extent of such damages. Accordingly, if (i) the
applicable Registration Statement is not filed with the Commission on or prior
to 90 calendar days after the Closing Date, (ii) the Exchange Offer Registration
Statement or the Shelf Registration Statement, as the case may be, is not
declared effective within 180 calendar days after the Closing Date (or in the
case of a Shelf Registration Statement required to be filed in response to a
change in law or the applicable interpretations of Commission's staff, if later,
within 90 calendar days after publication of the change in law or
interpretation), (iii) the Registered Exchange Offer is not consummated on or
prior to 210 calendar days after the Closing Date, or (iv) the Shelf
Registration Statement is filed and declared effective within 180 calendar days
after the Closing Date (or in the case of a Shelf Registration Statement
required to be filed in response to a change in law or the applicable
interpretations of Commission's staff, if later, within 90 calendar days after

                                       6
<PAGE>   7

publication of the change in law or interpretation) but shall thereafter cease
to be effective or useable for resales (at any time that the Company is
obligated to maintain the effectiveness thereof) without being succeeded within
45 calendar days by an additional Registration Statement filed and declared
effective (each such event referred to in clauses (i) through (iv), a
"REGISTRATION DEFAULT"), the Company will be obligated to pay a special interest
premium (the "SPECIAL INTEREST PREMIUM") as liquidated damages to each Holder of
Transfer Restricted Notes, during the period of one or more such Registration
Defaults, in an amount equal to 0.25% per annum on the principal amount of
Transfer Restricted Notes held by such Holder until (i) the applicable
Registration Statement is filed, (ii) the Exchange Offer Registration Statement
is declared effective and the Registered Exchange Offer is consummated, (iii)
the Shelf Registration Statement is declared effective or (iv) the Shelf
Registration Statement again becomes effective, as the case may be; provided,
however, that the aggregate amount of Special Interest Premium payable in
respect of any Note pursuant this Section 3(a) shall not exceed 0.25% per annum
and provided, further, that the accrual of Special Interest Premium on any Note
will cease immediately upon the cure of all Registration Defaults. As used
herein, the term "TRANSFER RESTRICTED NOTES" means (i) each Note until the date
on which such Note has been exchanged for a freely transferable Exchange Note in
the Registered Exchange Offer, (ii) each Note or Private Exchange Note until the
date on which it has been effectively registered under the Securities Act and
disposed of in accordance with the Shelf Registration Statement or (iii) each
Note or Private Exchange Note until the date on which it is distributed to the
public pursuant to Rule 144 under the Securities Act or is saleable pursuant to
Rule 144(k) under the Securities Act. Notwithstanding anything to the contrary
in this Section 3(a), the Company shall not be required to pay liquidated
damages to a Holder of Transfer Restricted Notes if such Holder failed to comply
with its obligations to make the representations set forth in the second to last
paragraph of Section 1 or failed to provide the information required to be
provided by it, if any, pursuant to Section 4(n).

        (b) The Company shall notify the Trustee and the Paying Agent under the
Indenture immediately upon the happening of each and every Registration Default.
The Company shall pay the liquidated damages due on the Transfer Restricted
Notes by depositing with the Paying Agent, in trust, for the benefit of the
Holders thereof, prior to 10:00 a.m., New York City time, on the next interest
payment date specified by the Indenture and the Notes, sums sufficient to pay
the liquidated damages then due. The liquidated damages due shall be payable on
each interest payment date specified by the Indenture and the Notes to the
record holder entitled to receive the interest payment to be made on such date.
Each obligation to pay liquidated damages shall be deemed to accrue from and
including the date of the applicable Registration Default.

                                       7
<PAGE>   8

        (c) The parties hereto agree that the liquidated damages provided for in
this Section 3 constitute a reasonable estimate of and are intended to
constitute the sole damages that will be suffered by Holders of Transfer
Restricted Notes by reason of the failure of (i) the Shelf Registration
Statement or the Exchange Offer Registration Statement to be filed, (ii) the
Shelf Registration Statement to remain effective or (iii) the Exchange Offer
Registration Statement to be declared effective and the Registered Exchange
Offer to be consummated, in each case to the extent required by this Agreement.

        4. Registration Procedures. In connection with any Registration
Statement, the following provisions shall apply:

        (a) The Company shall (i) furnish to each Initial Purchaser, prior to
the filing thereof with the Commission, a copy of the Registration Statement and
each amendment thereof and each supplement, if any, to the prospectus included
therein and shall use its reasonable best efforts to reflect in each such
document, when so filed with the Commission, such comments as any Initial
Purchaser may reasonably propose; (ii) include the information set forth in
Annex A hereto on the cover, in Annex B hereto in the "Exchange Offer
Procedures" section and the "Purpose of the Exchange Offer" section and in Annex
C hereto in the "Plan of Distribution" section of the prospectus forming a part
of the Exchange Offer Registration Statement, and include the information set
forth in Annex D hereto in the Letter of Transmittal delivered pursuant to the
Registered Exchange Offer; and (iii) if requested by any Initial Purchaser,
include the information required by Items 507 or 508 of Regulation S-K, as
applicable, in the prospectus forming a part of the Exchange Offer Registration
Statement.

        (b) The Company shall advise each Initial Purchaser, each Participating
Broker-Dealer and the Holders (if applicable) and, if requested by any such
person, confirm such advice in writing (which advice pursuant to clauses
(ii)-(v) hereof shall be accompanied by an instruction to suspend the use of the
prospectus until the requisite changes have been made):

                (i) when any Registration Statement and any amendment thereto
        has been filed with the Commission and when such Registration Statement
        or any post-effective amendment thereto has become effective;

                (ii) of any request by the Commission for amendments or
        supplements to any Registration Statement or the prospectus included
        therein or for additional information;

                (iii) of the issuance by the Commission of any stop order
        suspending the effectiveness of any Registration Statement or the
        initiation of any proceedings for that purpose;

                                       8
<PAGE>   9

                (iv) of the receipt by the Company of any notification with
        respect to the suspension of the qualification of the Notes, the
        Exchange Notes or the Private Exchange Notes for sale in any
        jurisdiction or the initiation or threatening of any proceeding for such
        purpose; and

                (v) of the happening of any event that requires the making of
        any changes in any Registration Statement or the prospectus included
        therein in order that the statements therein are not misleading and do
        not omit to state a material fact required to be stated therein or
        necessary to make the statements therein not misleading.

        (c) The Company will make every reasonable effort to obtain the
withdrawal at the earliest possible time of any order suspending the
effectiveness of any Registration Statement.

        (d) The Company will furnish to each Holder of Transfer Restricted Notes
included within the coverage of any Shelf Registration Statement, without
charge, at least one conformed copy of such Shelf Registration Statement and any
post-effective amendment thereto, including financial statements and schedules
and, if any such Holder so requests in writing, all exhibits thereto (including
those, if any, incorporated by reference).

        (e) The Company will, during the Shelf Registration Period, promptly
deliver to each Holder of Transfer Restricted Notes included within the coverage
of any Shelf Registration Statement, without charge, as many copies of the
prospectus (including each preliminary prospectus) included in such Shelf
Registration Statement and any amendment or supplement thereto as such Holder
may reasonably request; and the Company consents to the use of such prospectus
or any amendment or supplement thereto by each of the selling Holders of
Transfer Restricted Notes in connection with the offer and sale of the Transfer
Restricted Notes covered by such prospectus or any amendment or supplement
thereto.

        (f) The Company will furnish to each Initial Purchaser and each
Participating Broker-Dealer, and to any other Holder who so requests, without
charge, at least one conformed copy of the Exchange Offer Registration Statement
and any post-effective amendment thereto, including financial statements and
schedules and, if any Initial Purchaser or Participating Broker-Dealer or any
such Holder so requests in writing, all exhibits thereto (including those, if
any, incorporated by reference).

        (g) The Company will, during the Exchange Offer Registration Period or
the Shelf Registration Period, as applicable, promptly deliver to each Initial
Purchaser, each Participating Broker-Dealer and such other persons that are
required to deliver a prospectus following the Registered Exchange Offer,
without charge, as many copies of the final prospectus included in the Exchange
Offer

                                       9
<PAGE>   10

Registration Statement or the Shelf Registration Statement and any amendment or
supplement thereto as such Initial Purchaser, Participating Broker-Dealer or
other persons may reasonably request; and the Company consents to the use of
such prospectus or any amendment or supplement thereto by any such Initial
Purchaser, Participating Broker-Dealer or other persons, as applicable, as
aforesaid.

        (h) Prior to the effective date of any Registration Statement, the
Company will use its reasonable best efforts to register or qualify, or
cooperate with the Holders of Notes, Exchange Notes or Private Exchange Notes
included therein and their respective counsel in connection with the
registration or qualification of, such Notes, Exchange Notes or Private Exchange
Notes for offer and sale under the Notes or blue sky laws of such jurisdictions
as any such Holder reasonably requests in writing and do any and all other acts
or things necessary or advisable to enable the offer and sale in such
jurisdictions of the Notes, Exchange Notes or Private Exchange Notes covered by
such Registration Statement; provided that the Company will not be required to
qualify generally to do business in any jurisdiction where it is not then so
qualified or to take any action which would subject it to general service of
process or to taxation in any such jurisdiction where it is not then so subject.

        (i) The Company will cooperate with the Holders of Notes, Exchange Notes
or Private Exchange Notes to facilitate the timely preparation and delivery of
certificates representing Notes, Exchange Notes or Private Exchange Notes to be
sold pursuant to any Registration Statement free of any restrictive legends and
in such denominations and registered in such names as the Holders thereof may
request in writing prior to sales of Notes, Exchange Notes or Private Exchange
Notes pursuant to such Registration Statement.

        (j) If any event contemplated by Section 4(b)(ii) through (v) occurs
during the period for which the Company is required to maintain an effective
Registration Statement, the Company will promptly prepare and file with the
Commission a post-effective amendment to the Registration Statement or a
supplement to the related prospectus or file any other required document so
that, as thereafter delivered to purchasers of the Notes, Exchange Notes or
Private Exchange Notes from a Holder, the prospectus will not include an untrue
statement of a material fact or omit to state a material fact necessary in order
to make the statements therein, in the light of the circumstances under which
they were made, not misleading.

        (k) Not later than the effective date of the applicable Registration
Statement, the Company will provide CUSIP numbers for the Notes, the Exchange
Notes and the Private Exchange Notes, as the case may be, and provide the
Trustee with printed certificates for the Notes, the Exchange Notes or the
Private Exchange Notes, as the case may be, in a form eligible for deposit with
The Depository Trust Company.

                                       10
<PAGE>   11

        (l) The Company will comply with all applicable rules and regulations of
the Commission and will make generally available to its security holders as soon
as practicable after the effective date of the applicable Registration Statement
an earning statement satisfying the provisions of Section 11(a) of the
Securities Act; provided that in no event shall such earning statement be
delivered later than 45 calendar days after the end of a 12-month period (or 90
calendar days, if such period is a fiscal year) beginning with the first month
of the Company's first fiscal quarter commencing after the effective date of the
applicable Registration Statement, which statement shall cover such 12-month
period.

        (m) The Company will cause the Indenture to be qualified under the Trust
Indenture Act as required by applicable law in a timely manner.

        (n) The Company may require each Holder of Transfer Restricted Notes to
be registered pursuant to any Shelf Registration Statement to furnish to the
Company such information concerning the Holder and the distribution of such
Transfer Restricted Notes as the Company may from time to time reasonably
require for inclusion in such Shelf Registration Statement, and the Company may
exclude from such registration the Transfer Restricted Notes of any Holder that
fails to furnish such information within a reasonable time after receiving such
request.

        (o) In the case of a Shelf Registration Statement, each Holder of
Transfer Restricted Notes to be registered pursuant thereto agrees by
acquisition of such Transfer Restricted Notes that, upon receipt of any notice
from the Company pursuant to Section 4(b)(ii) through (v), such Holder will
discontinue disposition of such Transfer Restricted Notes until such Holder's
receipt of copies of the supplemental or amended prospectus contemplated by
Section 4(j) or until advised in writing (the "ADVICE") by the Company that the
use of the applicable prospectus may be resumed. If the Company shall give any
notice under Section 4(b)(ii) through (v) during the period that the Company is
required to maintain an effective Registration Statement (the "EFFECTIVENESS
PERIOD"), such Effectiveness Period shall be extended by the number of days
during such period from and including the date of the giving of such notice to
and including the date when each seller of Transfer Restricted Notes covered by
such Registration Statement shall have received (x) the copies of the
supplemental or amended prospectus contemplated by Section 4(j) (if an amended
or supplemental prospectus is required) or (y) the Advice (if no amended or
supplemental prospectus is required).

        (p) In the case of a Shelf Registration Statement, the Company shall
enter into such customary agreements (including, if requested, an underwriting
agreement in customary form) and take all such other action, if any, as Holders
of a majority in aggregate principal amount of the Notes, Exchange Notes and
Private Exchange Notes being sold or the managing underwriters (if any) shall

                                       11
<PAGE>   12

reasonably request in order to facilitate any disposition of Notes, Exchange
Notes or Private Exchange Notes pursuant to such Shelf Registration Statement.

        (q) In the case of a Shelf Registration Statement, the Company shall (i)
make reasonably available for inspection by a representative of, and Special
Counsel (as defined below) acting for, Holders of a majority in aggregate
principal amount of the Notes, Exchange Notes and Private Exchange Notes being
sold and any underwriter participating in any disposition of Notes, Exchange
Notes or Private Exchange Notes pursuant to such Shelf Registration Statement,
all relevant financial and other records, pertinent corporate documents and
properties of the Company and its subsidiaries and (ii) use its reasonable best
efforts to have its officers, directors, employees, accountants and counsel
supply all relevant information reasonably requested by such representative,
Special Counsel or any such underwriter (an "INSPECTOR") in connection with such
Shelf Registration Statement.

        (r) In the case of a Shelf Registration Statement, the Company shall, if
requested by Holders of a majority in aggregate principal amount of the Notes,
Exchange Notes and Private Exchange Notes being sold, their Special Counsel or
the managing underwriters (if any) in connection with such Shelf Registration
Statement, use its reasonable best efforts to cause (i) its counsel to deliver
an opinion relating to the Shelf Registration Statement and the Notes, Exchange
Notes or Private Exchange Notes, as applicable, in customary form, (ii) its
officers to execute and deliver all customary documents and certificates
requested by Holders of a majority in aggregate principal amount of the Notes,
Exchange Notes and Private Exchange Notes being sold, their Special Counsel or
the managing underwriters (if any) and (iii) its independent public accountants
to provide a comfort letter or letters in customary form, subject to receipt of
appropriate documentation as contemplated, and only if permitted, by Statement
of Auditing Standards No. 72.

        5. Registration Expenses. The Company will bear all expenses incurred in
connection with the performance of its obligations under Sections 1, 2, 3 and 4
and the Company will reimburse the Initial Purchasers and the Holders for the
reasonable fees and disbursements of one firm of attorneys (in addition to any
local counsel) chosen by the Holders of a majority in aggregate principal amount
of the Notes, the Exchange Notes and the Private Exchange Notes to be sold
pursuant to each Registration Statement (the "SPECIAL COUNSEL") acting for the
Initial Purchasers or Holders in connection therewith.

        6. Indemnification and Contribution. In the event of a Shelf
Registration Statement or in connection with any prospectus delivery pursuant to
an Exchange Offer Registration Statement by an Initial Purchaser or
Participating Broker-Dealer, as applicable, the Company shall indemnify and hold
harmless each Holder (including, without limitation, any such Initial Purchaser
or Participating Broker-Dealer) and each person, if any, who controls such
Holder within the

                                       12
<PAGE>   13

meaning of the Securities Act or the Exchange Act (collectively referred to for
purposes of this Section 6 as a Holder) from and against any and all losses,
claims, damages and liabilities (including, without limitation, any loss, claim,
damage or liability relating to purchases and sales of Notes, Exchange Notes or
Private Exchange Notes) caused by (i) any untrue statement or alleged untrue
statement of a material fact contained in any such Registration Statement or any
prospectus forming part thereof or in any amendment or supplement thereto or
(ii) the omission or alleged omission to state therein a material fact required
to be stated therein or necessary in order to make the statements therein, in
the light of the circumstances under which they were made, not misleading;
provided, however, that the Company shall not be liable in any such case to the
extent that any such loss, claim, damage, liability or action arises out of, or
is based upon, an untrue statement or alleged untrue statement in or omission or
alleged omission from any of such documents in reliance upon and in conformity
with any Holders' Information; and provided, further, that with respect to any
such untrue statement in or omission from any related preliminary prospectus,
the indemnity agreement contained in this Section 6 shall not inure to the
benefit of any Holder from whom the person asserting any such loss, claim,
damage, liability or action received Notes, Exchange Notes or Private Exchange
Notes to the extent that such loss, claim, damage, liability or action of or
with respect to such Holder results from the fact that both (A) a copy of the
final prospectus was not sent or given to such person at or prior to the written
confirmation of the sale of such Notes, Exchange Notes or Private Exchange Notes
to such person and (B) the untrue statement in or omission from the related
preliminary prospectus was corrected in the final prospectus unless, in either
case, such failure to deliver the final prospectus was a result of
non-compliance by the Company with Section 4(d), 4(e), 4(f) or 4(g).

        In the event of a Shelf Registration statement, each Holder agrees,
severally and not jointly, to indemnify and hold harmless the Company, its
directors, its officers who sign the Registration Statement thereto and each
person, if any, who controls the Company within the meaning of either the
Securities Act or the Exchange Act to the same extent as the foregoing indemnity
from the Company to such Holder, but only with reference to information relating
to such Holder furnished to the Company by such Holder in writing expressly for
use in any such Registration Statement and any prospectus or any amendments or
supplements thereto.

        In case any proceeding (including any governmental investigation) shall
be instituted involving any person in respect of which indemnity may be sought
pursuant to either of the two preceding paragraphs, such person (the
"INDEMNIFIED PARTY") shall promptly notify the person against whom such
indemnity may be sought (the "INDEMNIFYING PARTY") in writing and the
indemnifying party, upon request of the indemnified party, shall retain counsel
reasonably satisfactory to the indemnified party to represent the indemnified
party and any others the indemnifying party may designate in such proceeding and
shall pay the fees and disbursements of such counsel related to such proceeding.
In any such

                                       13
<PAGE>   14

proceeding, any indemnified party shall have the right to retain its own
counsel, but the fees and expenses of such counsel shall be at the expense of
such indemnified party unless (i) the indemnifying party and the indemnified
party shall have mutually agreed to the retention of such counsel or (ii) the
named parties to any such proceeding (including any impleaded parties) include
both the indemnifying party and the indemnified party and representation of both
parties by the same counsel would be inappropriate due to actual or potential
conflicting interests between them. It is understood that the indemnifying party
shall not, in respect of the legal expenses of any indemnified party in
connection with any proceeding or related proceedings in the same jurisdiction,
be liable for the fees and expenses of more than one separate firm (in addition
to any local counsel) for all such indemnified parties and that all such fees
and expenses shall be reimbursed as they are incurred. Such firm shall be
designated in writing by the indemnified parties, in the case of parties
indemnified pursuant to the second preceding paragraph, and by the Company, in
the case of parties indemnified pursuant to the first preceding paragraph. The
indemnifying party shall not be liable for any settlement of any proceeding
effected without its written consent, but if settled with such consent or if
there be a final judgment for the plaintiff, the indemnifying party agrees to
indemnify the indemnified party from and against any loss or liability by reason
of such settlement or judgment. No indemnifying party shall, without the prior
written consent of the indemnified party, effect any settlement of any pending
or threatened proceeding in respect of which any indemnified party is or could
have been a party and indemnity could have been sought hereunder by such
indemnified party, unless such settlement includes an unconditional release of
such indemnified party from all liability on claims that are the subject matter
of such proceeding.

        If the indemnification provided for in this Section 6 is unavailable or
insufficient to hold harmless an indemnified party in respect of any losses,
claims, damages or liabilities referred to therein, then each indemnifying party
shall, in lieu of indemnifying such indemnified party, contribute to the amount
paid or payable by such indemnified party as a result of such loss, claim,
damage or liability (i) in such proportion as shall be appropriate to reflect
the relative benefits received by the Company from the offering and sale of the
Notes, on the one hand, and a Holder with respect to the sale by such Holder of
Notes, Exchange Notes or Private Exchange Notes, on the other, or (ii) if the
allocation provided by clause (i) above is not permitted by applicable law, in
such proportion as is appropriate to reflect not only the relative benefits
referred to in clause (i) above but also the relative fault of the Company on
the one hand and such Holder on the other with respect to the statements or
omissions that resulted in such loss, claim, damage or liability, as well as any
other relevant equitable considerations. The relative benefits received by the
Company on the one hand and a Holder on the other with respect to such offering
and such sale shall be deemed to be in the same proportion as the total net
proceeds from the offering of the Notes (before deducting expenses) received by
or on behalf of the Company as set forth in Section 1 of the Purchase Agreement,
on the one hand, bear to the

                                       14
<PAGE>   15

total proceeds received by such Holder with respect to its sale of Notes,
Exchange Notes or Private Exchange Notes, on the other. The relative fault shall
be determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to state
a material fact relates to the Company or information supplied by the Company on
the one hand or to any Holders' Information supplied by such Holder on the
other, the intent of the parties and their relative knowledge, access to
information and opportunity to correct or prevent such untrue statement or
omission. The parties hereto agree that it would not be just and equitable if
contributions pursuant to this Section 6 were to be determined by pro rata
allocation or by any other method of allocation that does not take into account
the equitable considerations referred to herein. The amount paid or payable by
an indemnified party as a result of the loss, claim, damage or liability in
respect thereof, referred to above in this Section 6 shall be deemed to include,
for purposes of this Section 6, any legal or other expenses reasonably incurred
by such indemnified party in connection with investigating or defending or
preparing to defend any such action or claim. Notwithstanding the provisions of
this Section 6, an indemnifying party that is a Holder of Notes, Exchange Notes
or Private Exchange Notes shall not be required to contribute any amount in
excess of the amount by which the total price at which the Notes, Exchange Notes
or Private Exchange Notes sold by such indemnifying party to any purchaser
exceeds the amount of any damages which such indemnifying party has otherwise
paid or become liable to pay by reason of any untrue or alleged untrue statement
or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation.

        The indemnity and contribution provisions contained in this Section 6
and the representations and warranties of the Company contained herein shall
remain operative and in full force and effect regardless of (i) any termination
of this Agreement, (ii) any investigation made by or on behalf of any Holder or
any person controlling any Holder or by or on behalf of the Company, its
directors or officers or any person controlling the Company and (iii) acceptance
of and payment for any of the Notes, Exchange Notes or Private Exchange Notes.

        7. Rules 144 and 144A. The Company shall use its reasonable best efforts
to file the reports required to be filed by it under the Securities Act and the
Exchange Act in a timely manner and, if at any time the Company is not required
to file such reports, it will, upon the written request of any Holder of
Transfer Restricted Notes, make publicly available other information so long as
necessary to permit sales of such Holder's securities pursuant to Rules 144 and
144A. The Company covenants that it will take such further action as any Holder
of Transfer Restricted Notes may reasonably request, all to the extent required
from time to time to enable such Holder to sell Transfer Restricted Notes
without registration under the Securities Act within the limitation of the
exemptions provided by Rules 144 and 144A (including, without limitation, the
requirements of Rule

                                       15
<PAGE>   16

144A(d)(4)). Upon the written request of any Holder of Transfer Restricted
Notes, the Company shall deliver to such Holder a written statement as to
whether it has complied with such requirements. Notwithstanding the foregoing,
nothing in this Section 7 shall be deemed to require the Company to register any
of its securities pursuant to the Exchange Act.

        8. Underwritten Registrations. If any of the Transfer Restricted Notes
covered by any Shelf Registration Statement are to be sold in an underwritten
offering, the investment banker or investment bankers and manager or managers
that will administer the offering will be selected by the Holders of a majority
in aggregate principal amount of such Transfer Restricted Notes included in such
offering, subject to the consent of the Company (which shall not be unreasonably
withheld or delayed), and such Holders shall be responsible for all underwriting
commissions and discounts in connection therewith.

        No person may participate in any underwritten registration hereunder
unless such person (i) agrees to sell such person's Transfer Restricted Notes on
the basis reasonably provided in any underwriting arrangements approved by the
persons entitled hereunder to approve such arrangements and (ii) completes and
executes all questionnaires, powers of attorney, indemnities, underwriting
agreements and other documents reasonably required under the terms of such
underwriting arrangements.

        9. Miscellaneous. (a) Amendments and Waivers. The provisions of this
Agreement may not be amended, modified or supplemented, and waivers or consents
to departures from the provisions hereof may not be given, unless the Company
has obtained the written consent of Holders of a majority in aggregate principal
amount of the Notes, the Exchange Notes and the Private Exchange Notes, taken as
a single class. Notwithstanding the foregoing, a waiver or consent to depart
from the provisions hereof with respect to a matter that relates exclusively to
the rights of Holders whose Notes, Exchange Notes or Private Exchange Notes are
being sold pursuant to a Registration Statement and that does not directly or
indirectly affect the rights of other Holders may be given by Holders of a
majority in aggregate principal amount of the Notes, the Exchange Notes and the
Private Exchange Notes being sold by such Holders pursuant to such Registration
Statement.

        (b) Notices. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand-delivery, first-class mail,
telecopier or air courier guaranteeing next-day delivery:

                        (i) if to a Holder, at the most current address given by
                such Holder to the Company in accordance with the provisions of
                this Section 9(b), which address initially is, with respect to
                each Holder, the address of such Holder maintained by the
                Registrar

                                       16
<PAGE>   17

                under the Indenture, with a copy in like manner to Chase
                Securities Inc. and Salomon Smith Barney Inc.

                        (ii) if to an Initial Purchaser, initially at its
                address set forth in the Purchase Agreement; and

                        (iii) if to the Company, initially at the address of the
                Company set forth in the Purchase Agreement.

        All such notices and communications shall be deemed to have been duly
given: when delivered by hand, if personally delivered; one business day after
being delivered to a next-day air courier; five business days after being
deposited in the mail; and when receipt is acknowledged by the recipient's
telecopier machine, if sent by telecopier.

        (c) Successors And Assigns. This Agreement shall be binding upon the
Company and its successors and assigns.

        (d) Counterparts. This Agreement may be executed in any number of
counterparts (which may be delivered in original form or by telecopier) and by
the parties hereto in separate counterparts, each of which when so executed
shall be deemed to be an original and all of which taken together shall
constitute one and the same agreement.

        (e) Definition of Terms. For purposes of this Agreement, (a) the term
"BUSINESS DAY" means any day on which the New York Stock Exchange, Inc. is open
for trading, (b) the term "SUBSIDIARY" has the meaning set forth in Rule 405
under the Securities Act and (c) except where otherwise expressly provided, the
term "AFFILIATE" has the meaning set forth in Rule 405 under the Securities Act.

        (f) Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

        (g) Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of New York.

        (h) Remedies. In the event of a breach by the Company or by any Holder
of any of their obligations under this Agreement, each Holder or the Company, as
the case may be, in addition to being entitled to exercise all rights granted by
law, including recovery of damages (other than the recovery of damages for a
breach by the Company of its obligations under Sections 1 or 2 hereof for which
liquidated damages have been paid pursuant to Section 3 hereof), will be
entitled to specific performance of its rights under this Agreement. The Company
and each Holder agree that monetary damages would not be adequate compensation
for any loss incurred by reason of a breach by it of any of the provisions of
this Agreement and hereby further agree that, in the event of any action for
specific

                                       17
<PAGE>   18

performance in respect of such breach, it shall waive the defense that a remedy
at law would be adequate.

        (i) No Inconsistent Agreements. The Company represents, warrants and
agrees that (i) it has not entered into, shall not, on or after the date of this
Agreement, enter into any agreement that is inconsistent with the rights granted
to the Holders in this Agreement or otherwise conflicts with the provisions
hereof, (ii) it has not previously entered into any agreement which remains in
effect granting any registration rights with respect to any of its debt
securities to any person and (iii) without limiting the generality of the
foregoing, without the written consent of the Holders of a majority in aggregate
principal amount of the then outstanding Transfer Restricted Notes, it shall not
grant to any person the right to request the Company to register any debt
securities of the Company under the Securities Act unless the rights so granted
are not in conflict or inconsistent with the provisions of this Agreement.

        (j) No Piggyback on Registrations. Neither the Company nor any of its
security holders (other than the Holders of Transfer Restricted Notes in such
capacity) shall have the right to include any securities of the Company in any
Shelf Registration or Registered Exchange Offer other than Transfer Restricted
Notes.

        (k) Severability. The remedies provided herein are cumulative and not
exclusive of any remedies provided by law. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction to be
invalid, illegal, void or unenforceable, the remainder of the terms, provisions,
covenants and restrictions set forth herein shall remain in full force and
effect and shall in no way be affected, impaired or invalidated, and the parties
hereto shall use their reasonable best efforts to find and employ an alternative
means to achieve the same or substantially the same result as that contemplated
by such term, provision, covenant or restriction. It is hereby stipulated and
declared to be the intention of the parties that they would have executed the
remaining terms, provisions, covenants and restrictions without including any of
such that may be hereafter declared invalid, illegal, void or unenforceable.

                                       18
<PAGE>   19

        Please confirm that the foregoing correctly sets forth the agreement
among the Company and the Initial Purchasers.

                                            Very truly yours,

                                            AMERICAN HOME PRODUCTS
                                                   CORPORATION

                                            By: /s/ Jack M. O'Connor
                                                ----------------------------
                                            Name: Jack M. O'Connor
                                            Title: Vice President & Treasurer

Accepted:

Chase Securities Inc.
Salomon Smith Barney Inc.

Acting severally on behalf of
   themselves and the several Initial Purchasers listed in Schedule 1 to the
   Purchase Agreement.

By:   Chase Securities Inc.

      By:/s/ Maria Sramek
         --------------------
      Name: Maria Sramek
      Title: Vice President

                                       19
<PAGE>   20

                                                                         ANNEX A

        Each broker-dealer that receives Exchange Notes for its own account
pursuant to the Registered Exchange Offer must acknowledge that it will deliver
a prospectus in connection with any resale of such Exchange Notes. The Letter of
Transmittal states that by so acknowledging and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act. This Prospectus, as it may be amended or
supplemented from time to time, may be used by a broker-dealer in connection
with resales of Exchange Notes received in exchange for Notes where such Notes
were acquired by such broker-dealer as a result of market-making activities or
other trading activities. The Company has agreed that, for a period of 180 days
after the Expiration Date (as defined herein), it will make this Prospectus
available to any broker-dealer for use in connection with any such resale. See
"Plan of Distribution".

<PAGE>   21

                                                                         ANNEX B

        Each broker-dealer that receives Exchange Notes for its own account in
exchange for Notes, where such Notes were acquired by such broker-dealer as a
result of market-making activities or other trading activities, must acknowledge
that it will deliver a prospectus in connection with any resale of such Exchange
Notes. See "Plan of Distribution".

<PAGE>   22

                                                                         ANNEX C

                              PLAN OF DISTRIBUTION

        Each broker-dealer that receives Exchange Notes for its own account
pursuant to the Registered Exchange Offer must acknowledge that it will deliver
a prospectus in connection with any resale of such Exchange Notes. This
Prospectus, as it may be amended or supplemented from time to time, may be used
by a broker-dealer in connection with resales of Exchange Notes received in
exchange for Notes where such Notes were acquired as a result of market-making
activities or other trading activities. The Company has agreed that, for a
period of 180 days after the Expiration Date, it will make this prospectus, as
amended or supplemented, available to any broker-dealer for use in connection
with any such resale. In addition, until _______________, 200_, all dealers
effecting transactions in the Exchange Notes may be required to deliver a
prospectus.

        The Company will not receive any proceeds from any sale of Exchange
Notes by broker-dealers. Exchange Notes received by broker-dealers for their own
account pursuant to the Registered Exchange Offer may be sold from time to time
in one or more transactions in the over-the-counter market, in negotiated
transactions, through the writing of options on the Exchange Notes or a
combination of such methods of resale, at market prices prevailing at the time
of resale, at prices related to such prevailing market prices or at negotiated
prices. Any such resale may be made directly to purchasers or to or through
brokers or dealers who may receive compensation in the form of commissions or
concessions from any such broker-dealer or the purchasers of any such Exchange
Notes. Any broker-dealer that resells Exchange Notes that were received by it
for its own account pursuant to the Registered Exchange Offer and any broker or
dealer that participates in a distribution of such Exchange Notes may be deemed
to be an "underwriter" within the meaning of the Securities Act and any profit
on any such resale of Exchange Notes and any commission or concessions received
by any such persons may be deemed to be underwriting compensation under the
Securities Act. The Letter of Transmittal states that, by acknowledging that it
will deliver and by delivering a prospectus, a broker-dealer will not be deemed
to admit that it is an "underwriter" within the meaning of the Securities Act.

        For a period of 180 days after the Expiration Date the Company will
promptly send additional copies of this Prospectus and any amendment or
supplement to this Prospectus to any broker-dealer that requests such documents
in the Letter of Transmittal. The Company has agreed to pay all expenses
incident to the Registered Exchange Offer (including the expenses of one counsel
for the Holders of the Notes) other than commissions or concessions of any
broker-dealers and will indemnify the Holders of the Notes (including any
broker-dealers) against certain liabilities, including liabilities under the
Securities Act.

<PAGE>   23

                                                                         ANNEX D

        [ ]    CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10
               ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY
               AMENDMENTS OR SUPPLEMENTS THERETO.

               Name:
               Address:

If the undersigned is not a broker-dealer, the undersigned represents that it is
not engaged in, and does not intend to engage in, a distribution of Exchange
Notes. If the undersigned is a broker-dealer that will receive Exchange Notes
for its own account in exchange for Notes that were acquired as a result of
market-making activities or other trading activities, it acknowledges that it
will deliver a prospectus in connection with any resale of such Exchange Notes;
however, by so acknowledging and by delivering a prospectus, the undersigned
will not be deemed to admit that it is an "underwriter" within the meaning of
the Securities Act.<PAGE>   1

                                                                     EXHIBIT 4.1

                         YORK INTERNATIONAL CORPORATION

                         [TITLE OF SERIES OF SECURITIES]

NO. [   ]                                                           $[       ]

         [UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN
         DEFINITIVE FORM, THIS REGISTERED GLOBAL SECURITY MAY NOT BE TRANSFERRED
         EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR
         BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF
         THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR
         DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.]

                  YORK INTERNATIONAL CORPORATION, a Delaware corporation (such
corporation, and its successors and assigns under the Indenture hereinafter
referred to, being herein called the "Company"), for value received, hereby
promises to pay to [         ], or registered assigns, the principal sum of
[          ] at the office or agency of the Company referred to below, on
[      ], and to pay interest, semi-annually on [      ] and [      ] of
each year, on said principal sum at said office or agency, at the rate of[   ]%
per annum, from the [      ] or [       ], as the case may be, next
preceding the date of this Security to which interest has been paid, unless the
date hereof is the date to which interest has been paid, in which case from the
date of this Security, or unless no interest has been paid on the Securities, in
which case from [       ], until payment of said principal sum has been
made or duly provided for. Notwithstanding the foregoing, if the date hereof is
after the [     ] day of the calendar month preceding any [       ] or
[      ], as the case may be, and prior to such [      ] or
[       ], this Security shall bear interest; PROVIDED, HOWEVER, that if and
to the extent that the Company shall default in the payment of interest due on
such [      ] or[     ], then this Security shall bear interest from
the next preceding [       ] or[       ] to which interest has been
paid, or, if no interest has been paid on the Securities, from [      ].
The interest so payable on any [       ] or[      ] will, subject to
certain exceptions provided in the Indenture referred to on the reverse hereof,
be paid to the person in whose name this Security is registered at the close of
business on the [     ] day of the calendar month preceding such [       ] or
[       ].
                  Reference is made to the further provisions of this Security
set forth on the reverse hereof. Such further provisions shall for all purposes
have the same effect as though fully set forth at this place.
                  The Security shall not be valid or become obligatory for any
purpose until the certificate of authentication hereon shall have been signed by
the Trustee under the Indenture referred to on the reverse hereof.
                  IN WITNESS WHEREOF, York International Corporation has caused
this instrument to be executed in its name and on its behalf by the signature of
its [     ] and by signature of its [      ] and has caused
its corporate seal to be affixed hereunto or imprinted hereon.

Dated:[       ]

TRUSTEE'S CERTIFICATE OF AUTHENTICATION [SEAL] YORK INTERNATIONAL CORPORATION
This is one of the Securities of the series designated herein referred to in the
within mentioned Indenture.

THE BANK OF NEW YORK, as Trustee        By:[          ]

By:____________________________________ By:[          ]
                Authorized Officer

<PAGE>   2

                         YORK INTERNATIONAL CORPORATION

                         [TITLE OF SERIES OF SECURITIES]

                  This Security is one of a duly authorized issue of Securities
of the Company, designated as its [        ] (herein called the
"Securities"), limited (except as otherwise provided in the Indenture referred
to below) to the aggregate principal amount of $[       ], all issued or to
be issued under and pursuant to a [Senior] [Senior Subordinated] [Subordinated]
Indenture, dated as of [        ] (herein called the "Indenture"), duly
executed and delivered by the Company and The Bank of New York, as Trustee
(herein called the "Trustee"), to which Indenture and all indentures
supplemental thereto reference is hereby made for a statement of the respective
rights, limitations of rights, duties, obligations and immunities thereunder of
the Company, the Trustee and the holders of the Securities, and of the terms
upon which the Securities are, and are to be, authenticated and delivered. The
Securities are issuable in registered form only, without coupons, in
denominations of $[     ] and integral multiples thereof.
                  In case an Event of Default, as defined in the Indenture,
shall have occurred and be continuing, the principal hereof and interest hereon
may be declared, and upon such declaration shall become, due and payable, in the
manner, with the effect and subject to the conditions provided in the Indenture.
                  The Indenture permits, with certain exceptions as therein
provided, the amendment thereof and the modification of the rights and
obligations of the Company and the rights of the holders of the Securities at
any time by the Company and the Trustee with the consent of the holders of a
majority in aggregate principal amount of the outstanding Securities. The
Indenture also contains provisions permitting the holders of a majority in
aggregate principal amount of the outstanding Securities, on behalf of the
holders of all the Securities, to waive compliance by the Company with certain
provisions of the Indenture and certain past defaults under the Indenture and
their consequences. Any such consent or waiver by or on behalf of the holder of
this Security shall be conclusive and binding upon such holder and upon all
future holders of this Security and of any Security issued upon the registration
of transfer hereof or in exchange hereof or in lieu hereof whether or not
notation of such consent or waiver is made upon this Security.
                  Subject to the terms of the Indenture, the Company may elect
[either (i)] to defease and be discharged from any and all obligations with
respect to the Securities [or (ii) to be released from its obligations with
respect to certain covenants applicable to the Securities], upon compliance by
the Company with certain conditions set forth therein, which provisions apply to
this Security.
                  [Discussion of provisions relating to redemption, if
                  applicable.] [Discussion of provisions relating to
                  subordination, if applicable.]
                  No reference herein to the Indenture and no provision of this
Security or of the Indenture shall alter or impair the obligations of the
Company, which is absolute and unconditional, to pay the principal of and
interest on this Security at the place, at the respective times, at the rate and
in the coin or currency prescribed herein.
                  Upon the presentment for registration of transfer of this
Security at the office or agency of the Company at [       ], a new
Security or Securities of authorized denominations for an equal aggregate
principal amount will be issued to the transferee in exchange therefor, subject
to the limitations provided in the Indenture, without charge except for any tax
or other governmental charge imposed in connection therewith.
                  Prior to due presentment for registration of transfer of this
Security, the Company, the Trustee or any Security registrar, co-registrar,
paying agent or authenticating agent, may deem and treat the registered holder
hereof as the absolute owner of this Security, for the purpose of receiving
payment hereof, or on account hereof, and for all other purposes, and the
Company or the Trustee or any Security registrar, co-registrar, paying agent or
authenticating agent shall not be affected by any notice to the contrary.

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00024-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00024-of-00352.parquet"}]]