Document:

Exhibit 10.22  

June 11,
2002 

William
J. Elliott

2600 Cole Avenue, #302

Dallas, TX 75204 

Dear
Bill: 

        We
are pleased to extend the following offer of employment and agreement to you: 

	Title:	 	Executive Vice President, Global Commercial and Business Development
	

Reporting to:	
 	

S. Wayne Kay, President and CEO
	

Compensation:	
 	

$275,000 annually
	

Employment Bonus:	
 	

Upon commencing employment with QUIDEL Corporation, you will receive a one-time lump sum bonus of $50,000 (not grossed up), to be paid within the first week of employment.
	

Management Bonus:	
 	

You will be eligible to participate in the Quidel Management Bonus program with a target bonus of 30%. A copy of the bonus program for 2002 is included as Attachment A.
	

Stock Options:	
 	

You will receive an option to purchase 300,000 shares of common QUIDEL stock. The vesting schedule for this option will be 25% on the first year anniversary of the Option Grant Date and the remaining 75% will vest quarterly over the next three years.
The purchase price will be the closing NASDAQ market price of QUIDEL's stock on your actual start date. These options are subject to approval of the Board of Directors.
	

Relocation Assistance:	
 	

You will receive relocation assistance as outlined in the attached policy with all relocation expenses not to exceed $30,000. The Relocation Policy is outlined in Attachment B.
	

Severance:	
 	

You will be eligible for up to six months severance as outlined in Attachment C, Severance Payments.
	

Start Date:	
 	

June 17, 2002

        In
addition to the above, as a QUIDEL employee, you will be eligible to participate in our benefits programs which will take effect on your first day of employment. A summary of 

        these
benefits is enclosed. Details of these benefit plans will be provided to you upon your employment. 

        As
a condition of employment with QUIDEL Corporation, you will be required to: (1) read, sign and return one copy of the enclosed Invention and Confidential Information Agreement;
(2) within the first three days of employment, you must provide documents from the enclosed List Of Acceptable Documents (I-9) which prove your identity and right to work in the
United States; and (3) read, sign and return one copy of page 5 of the enclosed Employee Code of Conduct. 

        QUIDEL
Corporation is an at-will employer. This means that you have the right to terminate your employment with QUIDEL at any time, for any reason, with or without notice.
Similarly, QUIDEL has the right to terminate the employment relationship at any time, for any reason, with or without notice. 

Any contrary representations, which may have been made to you, are superseded by this offer. Any modifications to this "at-will" term of your employment must be in writing and signed by
you and QUIDEL's President. 

        If
you should voluntarily leave the company within one year of beginning work, you will be required to repay a prorated portion of your signing bonus. You must make this repayment within
30 days of providing notice of your resignation. 

        If
you should voluntarily leave the company within one year of beginning work, or one year of receiving relocation assistance, whichever is later, you will be required to repay a
prorated portion of all relocation expenses covered by QUIDEL. You must make this repayment within 30 days of providing notice of your resignation. 

        Please
indicate your acceptance of our offer by signing below and returning a copy of this letter to Human Resources. 

        Bill,
on behalf of Wayne Kay and the QUIDEL Leadership Team, we are looking forward to having you join us as we work together to provide quality products to the medical community and to
create value for the employees and shareholders of QUIDEL Corporation. 

Sincerely, 

/s/  JULIE DEMEULES    

Julie DeMeules

Vice President, Human Resources 

	cc:
	S.
Wayne Kay

Human Resources 

Enclosures

        I
have read, understand and accept these terms and conditions of employment. I further understand that while my salary, benefits, job title and job duties may change from time to time
without a written modification of this agreement, the at-will term of my employment is a term of employment which cannot be altered or modified except in writing, signed by me and
QUIDEL's President. 

	/s/  WILLIAM J. ELLIOTT      
 Signature	 	June 11, 2002
 Date<Page>

                                                                     EXHIBIT 4.1

                            NATIONAL COOPERATIVE BANK
                         RULES FOR ELECTION OF DIRECTORS

SECTION 1: PURPOSE, DISTRIBUTION. These election rules have been adopted by the
National Cooperative Bank's ("NCB") Board of Directors (the "Board") to
establish procedures for the conduct of an election to fill vacant stockholder
directorships on the Board, in accordance with the National Consumer Cooperative
Bank Act and the bylaws of NCB. The results of the election will be announced at
the next annual meeting of the Corporation.

The Corporate Secretary shall distribute a copy of these rules to all
stockholders of record. Each stockholder of record shall make these rules
available to its members if so requested.

SECTION 2: ELECTION OFFICER. The Corporate Secretary shall be NCB's election
officer responsible for the conduct of the election and the interpretation of
these rules. Subject to final Board review, the Corporate Secretary may
designate other NCB officials to assist in the conduct of the election and the
Corporate Secretary shall appoint persons outside of NCB to act as independent
election tellers or to provide other assistance as will enhance and protect the
integrity of the election. All questions regarding these rules and all required
correspondence and submissions should be directed to:

                        Louise M. Grant
                        Corporate Secretary
                        National Cooperative Bank
                        1725 Eye Street, N.W., Suite 600
                        Washington, DC 20006

SECTION 3: RECORD DATE, STOCKHOLDER LIST. December 31, of the year prior to the
date of any election or special election shall be the record date for
determining stockholders of record entitled to vote. The record date for any
run-off election shall be the same record date established under this section
for the original election. Upon written request, the Corporate Secretary shall
promptly make available a voting list containing the names and addresses of all
stockholders of record.

SECTION 4: NOTICE OF ELECTION.

4.1 NOTICE. The Corporate Secretary shall give notice of any election to all
stockholders of record at least sixty days preceding an election, special
election or run-off election. Notice shall be mailed to stockholders of record
at the address appearing on the Corporate Secretary's records. An official
ballot, which shall describe the qualifications of nominees and their positions
on issues, the date when ballots must be received by NCB, and all other
information necessary for participation in the election shall be mailed to
stockholders of record no later than thirty days preceding an election.

                                        1
<Page>

      (a)   Any stockholder who has failed to provide NCB with a current address
for three consecutive years will be considered an inactive member and shall not
be considered an eligible participant in the election process.

4.2 WAIVER OF NOTICE. Participation by any stockholder in the election shall
constitute a waiver by that stockholder of notice of such election, except where
the participation is for the express purpose of objecting to the transaction of
any business because the election or meeting was not properly called. A written
waiver of notice of any election signed by an authorized officer or a
stockholder shall be deemed equivalent to giving proper notice to such
stockholder.

SECTION 5: VOTING PROCEDURE.

5.1 PROXIES, MAIL VOTING, AND CUMULATIVE VOTING. Voting by proxy shall not be
permitted. Cumulative voting shall not be permitted. Election ballots will only
be accepted by mail.

5.2 OFFICIAL BALLOT. The Corporate Secretary shall prepare the official ballot
for the election and such ballot shall be distributed to all stockholders of
record. The official ballot shall include an appropriate form by which
stockholders of record may cast their votes for nominees for election.
Additional information to describe the qualifications of nominees also will be
distributed with the ballot. All votes must be cast on the official ballot in
order to be counted. The Corporate Secretary or other officer of the stockholder
of record, who is authorized to certify its corporate documents, must certify
that votes cast have been duly authorized on behalf of the stockholder of record
under its governing rules.

To be counted by the election date, all ballots must be mailed and be received
by the Election Teller at a designated address no later than the close of
business on April 11, 2003.

5.3 VOTE FINAL, CONFIDENTIALITY. When the Election Teller receives a ballot, the
votes cast by the stockholder shall be final. A ballot cannot be withdrawn or
changed if a nominee withdraws or for any other reason. Upon receipt of a duly
authorized request from a stockholder of record (certified by its Secretary or
other appropriate officer) the Corporate Secretary will provide another official
ballot to replace one that has been lost or destroyed.

5.4 SECRET BALLOT. NCB will conduct the election by a secret ballot process and
votes by particular stockholders of record will be kept confidential at all
times.

                                        2
<Page>

5.5 BALLOT DISQUALIFICATION.

      Ballot disqualification occurs if:

          (a)  Postmarked after midnight of due date;
          (b)  Hand-delivered to Election Teller;
          (c)  Not properly certified; and
          (d)  Stockholders vote for more than four (4) candidates.

SECTION 6.1: VACANCIES. The Board and the stockholders of record will nominate
persons to fill vacant stockholder directorships that have been created by the
expiration of the term of a director, by resignation or otherwise, under the
Bank Act and the bylaws. Nominations may be made of persons from the following
classes of cooperatives: (a) housing, (b) consumer goods, (c) low-income
cooperatives, (d) consumer services, and (e) all other eligible cooperatives.
All nominees shall be selected by the Board and/or the stockholders as described
in subsection 6.2 and 6.3 respectively, and nominees must meet the
qualifications set forth in subsection 6.4. Nominations and the election shall
be conducted in a manner that will ensure, at all times, that there shall be at
least one but no more than three directors representing each of the following
classes of cooperatives: housing, consumer goods, low-income cooperatives,
consumer services, and all other eligible cooperatives.

6.2 BOARD NOMINATIONS. The Board shall, upon recommendation of the chairman,
elect a Nominating Committee, which shall by a majority vote, nominate persons
for election to fill vacant stockholder directorships. No person other than an
NCB director shall serve on the Nominating Committee. The Nominating Committee
shall solicit advice and recommendations from stockholders of record, the
cooperative community, and other sources in its consideration of potential
nominees. The Nominating Committee shall by a majority vote select at least two
(2) nominees for each vacant stockholder directorship. Nominees may present a
statement of qualifications and issues to be distributed with the official
ballot. Such nominees shall be listed on the official ballot, but shall not
receive any preferential treatment or special use of the Bank's resources.
Statements of qualifications and issues and other materials distributed by a
nominee may not use the NCB logo or confusingly similar logo and may not state
or imply that NCB supports or endorses such nominee. Any elected director who
has served two consecutive three-year terms shall not be eligible for
renomination by the Nominating Committee for two years after completion of the
consecutive terms and shall not begin service for the new term for three years
after completion of the original consecutive terms. The list of persons
nominated by the Board shall be mailed to all stockholders of record with the
official notice of the election.

6.3 STOCKHOLDER NOMINATIONS. In addition to the nominees selected by the
Nominating Committee under subsection 6.2, other persons may be nominated to
fill vacant stockholder's directorships and may be listed on the official ballot
under this subsection. To qualify for the official ballot, such persons must
receive support for their nomination from at least fifteen percent (15%) of the
stockholders of record. Stockholder nominees must obtain resolutions of support
(on a form to be provided by NCB) from the required number of stockholders. Such
resolutions must be compiled by potential nominees and received by NCB no later
than 45 days prior to the election date. The Corporate Secretary will

                                        3
<Page>

promptly verify the qualifications of persons receiving the required support and
will promptly notify all persons seeking nomination under this subsection,
whether or not their efforts were successful.

Stockholder nominees also may submit a statement of qualifications and issues to
be distributed with the official ballot. Statements of qualifications and issues
and other materials distributed by a nominee may not use the NCB logo or
confusingly similar logo and may not state or imply that NCB supports or
endorses such nominee.

6.4 QUALIFICATIONS.

6.4.1 Each nominee for a shareholder directorship of a particular class shall
have at least three years experience as a director or senior officer in the
class of cooperatives to be represented. Each nominee shall currently be
associated with a voting stockholder of NCB. Each nominee shall be required to
designate the particular class of cooperative, which he or she is qualified to
represent. No nominee shall be allowed to run to fill vacancies in more than one
class of cooperative. Further requirements are as follows:

      (a)   Loans outstanding from NCB must be in good standing.

      (b)   A nominee who qualified through a management position must also have
demonstrated experience as a Board director.

      (c)   A nominee shall have business experience in at least one of the
following fields: finance, marketing, operations, or economic development.

      (d)   Except for requirements in the Bank Act, the Nominating Committee
may make exceptions to these qualifications at its discretion.

6.4.2 All nominees shall submit (on a form provided by NCB) such information as
NCB deems necessary to verify that the nominee has the required experience.

6.4.3 No NCB employee shall be qualified for nomination until three (3) years
after the date such employee's employment with NCB was terminated. If NCB
determines that any nominee does not meet these qualifications, the Corporate
Secretary shall report the reasons for such failure to the Board.

6.4.4 Each nominee will be required to file with the Ethics Official of NCB (on
a form to be provided) and make public, a statement of the nominee's financial
interests and positions, if any, in any corporation, trust, partnership, or
cooperative organization in which such nominee holds a substantial financial
interest or holds a position as a Board member or senior officer, the activity
of which organization might be relevant to, be competitive with, or be
inconsistent with the objectives of NCB.

6.4.5 Subject to review by the Nominating Committee, the Corporate Secretary
shall determine the validity of documentary evidence submitted in support of a
nomination as outlined in Section 6.4.2. Nominations to fill vacancies on the
Board of Directors will not be accepted from the floor at any annual or special
meeting of stockholders.

                                        4
<Page>

SECTION 7: ELECTION OF DIRECTORS.

7.1 ELECTION ORDER. The election shall be decided based on a plurality of votes
cast by the stockholders of record who participate in the election. Directors
shall be elected to fill available vacancies in the particular class for which
the director is nominated and to the extent vacancies exist (see section 6.1).
In the event two nominees are seeking election to a single board seat within a
particular class, the nominee receiving the greatest number of votes will be
elected. The unsuccessful nominee will not be considered for a seat on the
Board.

7.2 VOTING POWER. For each election or run-off election, only stockholders of
record shall be entitled to vote, but only as provided in this section. Each
stockholder of record shall be entitled to cast votes for the number of nominees
equal to the number of vacancies to be filled in the election or run-off
election. A stockholder of record shall not be required to vote for each vacancy
but may only vote once for each nominee.

7.3 DEFINITIONS. For purposes of these rules, the following definitions shall
apply:

      (a)   "borrowing-stockholder" shall mean any stockholder of record who has
a loan outstanding from NCB at any time during the patronage period;

      (b)   "non-borrower-stockholder" shall mean a stockholder of record who
holds Class C stock not connected with a loan and/or any former borrower, who
fully paid off loans in the calendar year preceding the patronage period;

      (c)   For the purpose of voting, "patronage" shall mean the amount of
interest paid to NCB, including interest paid on loans originally made by NCB
which have been sold and which NCB is now servicing, and loan fees, including
commitment, origination, line and letter of credit fees, paid by a current
borrower during a given year;

      (d)   "patronage period" shall mean the calendar year preceding the
election year; and

      (e)   "developing cooperative" shall mean a borrower-stockholder that is
chartered on a cooperative basis and determined to be an eligible cooperative
while at a developmental stage of operation and does not presently have members
who are identified as ultimate consumers (or primary producers) of the goods,
services and facilities provided but that, at some definite time in the future,
will be controlled by and provide services to ultimate consumers (or primary
producers).

7.4 ALLOCATIONS. Except as otherwise limited in this section:

      (a)   Each borrower-stockholder of record shall be entitled to at least
five (5) votes,

                                        5
<Page>

except as provided under Section 7.4(e);

      (b)   Each borrower-stockholder of record shall be entitled to additional
votes which shall be allocated based on the proportion a particular
borrower-stockholder's patronage bears to patronage in that stockholder's
portfolio category, calculated during the patronage period which, for example,
results in the following allocation:

<Table>
<Caption>
          Percent of interest income
      and fees attributable to patronage          Votes
      ----------------------------------          -----
                           <S>                      <C>
                               .1% - .5%              5
                               .6 - 1.0%             10
                             1.1% - 1.5%             15
                             1.6% - 2.0%             20
                             2.1% - 2.5%             25
                             2.6% - 3.0%             30
                             3.1% - 3.5%             35
                             3.6% - 4.0%             40
                             4.1% - 4.5%             45
                             4.6% - 5.0%             50
                             5.1% - 5.5%             55
                             5.6% - 6.0%             60
                             6.1% - 6.5%             65
                             6.6% - 7.0%             70
                             7.1% - 7.5%             75
                             7.6% - 8.0%             80
                             8.1% - 8.5%             85
                             8.6% - 9.0%             90
                             9.1% - 9.5%             95
                            9.6% - 10.0%            100
                           10.1% - 10.5%            105
                           10.6% - 11.0%            110
                           11.1% - 11.5%            115
                                   11.6%            120
</Table>

                                        6
<Page>

      (c)   Each non-borrower stockholder shall be entitled to at least one vote
and the non-borrower stockholder voting class shall receive a minimum of 10% of
the outstanding votes allocated;

      (d)   Notwithstanding any of the foregoing additional allocations of votes
that would otherwise be applied to the vote of a stockholder of record, no
stockholder of record shall be entitled to more than five percent (5%) of the
total votes allocated to all voting stockholders of record; no stockholder of
record that is a developing cooperative shall receive more than five (5) votes;
and the total votes allocated to any one portfolio class of stockholders shall
not exceed forty-five percent (45%) of the total number of votes allocated; and

      (e)   The Board reserves the right to adjust the allocations of votes
described in this section in order to preserve the voting balance among NCB's
stockholders of record required by the Bank Act.

7.5 LIMITED VOTING POWER--DELINQUENT BORROWERS. NCB shall refuse to allocated
additional votes to any borrower-stockholder which as of the record date is more
than ninety (90) days past due in the payment of principal or interest due to
NCB under a loan. However, such delinquent borrower-stockholder may cast one (1)
vote regardless of any allocations of votes such borrower-stockholder would
otherwise receive under this section.

SECTION 8. RUN-OFF ELECTION. If there is a tie vote and, as a result, vacancies
remain in stockholder directorships after the procedures described in this
section are followed, the Board shall fix a date for a run-off election. Such
election shall be held not later than sixty (60) days from the original election
date. The Corporate Secretary shall issue notice of the run-off election and an
official ballot for the election in accordance with Section 4 and Section 5 of
these rules, respectively. The official ballot for the run-off election shall
include only the names of those nominees who tied on the original ballot and are
qualified to fill remaining vacancies. In a run-off election, the qualified
nominee receiving the highest number of votes cast for each vacancy in a
particular class shall be elected.

SECTION 9. NCB EMPLOYEE PARTICIPATION. NCB employees shall not solicit votes,
campaign for nominees, or use employment with NCB in any other manner to
influence the outcome of any nomination or election under these rules. Violation
of this section may lead to disciplinary action or termination of employment
under NCB's Code of Conduct. Nothing in this section shall be construed to
prevent NCB employees from having legitimate communications with nominees,
stockholders or directors as a result of their official job responsibilities.

                                        7

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