Document:

Exhibit 10.02
CNEX LETTER OF INTENT

Comes Now, Emergency Filtration Productions, Inc. a Nevada Corporation
("EMFP") and Centrex Inc., an Oklahoma Corporation ("CNEX") and for their
letter of intent set forth as follows:

 That EMFP is traded on the OTCBB.

 That CNEX is traded on the OTCBB.

 That EMFP currently holds military national stocking number for the RespAide
CPR isolation mask and replacement filters and for Superstat.  EMFP has
received and fulfilled orders from the U.S. Navy and the Defense Supply
Center.

 That CNEX is a development-stage company that owns an exclusive worldwide
license to Single Molecule Detection, a technology that was developed at Los
Alamos National Laboratory.  The technology can detect bacteria or virus by
matching the DNA of the organism.  The Company entered into a research
agreement with the University of California (the "University") in early 1999
to develop a prototype system to detect the deadly form of E.coli bacteria.
The University's research and development activities are conducted at Los
Alamos National Laboratory ("Los Alamos".)

 That CNEX and EMFP marketing efforts will overlap and the parties believe a
relationship between the parties will be mutually beneficial.

 That the parties wish to explore the possibility of joint marketing, a joint
venture, a merger and/or acquisition.

 That in order to facilitate any of the transactions listed above EMFP and
CNEX will exchange shares of their Common Stock as set forth below:

 EMFP will transfer four hundred fifty thousand shares of its Common Stock to
CNEX.  These shares will have piggy-back registration rights and will be
included in EMFP's next SB-2 registration statement.

 CNEX will transfer three hundred thousand shares of its Common Stock to EMFP.
These shares will have demand registration rights and be included in CNEX's
SB-2, which will be filed on December 30, 2002 under Rule 462(B) and will be
effective upon filing.

 The parties both acknowledge that they have been represented by Kaufman &
Associates, PLLC of Tulsa, OK.  The parties by execution of this letter of
intent hereby acknowledge this representation and the conflict of interest.
The parties further waive any conflict of interest, whether real, perceived or
otherwise and release Kaufman & Associates, PLLC from any and all liabilities
which directly or indirectly relate to this letter of intent or any potential
joint marketing, a joint venture, a merger and/or acquisition.

 The parties further acknowledge that Kaufman & Associates has advised both
EMFP and CNEX to seek independent counsel.

 Parties Representations and Warranties.  The Parties hereby represents and
warrants to and agrees that:

 (a) Information on CNEX and EMFP.  The Parties have been furnished or have
obtained from the EDGAR Website of the Securities and Exchange Commission (the
"Commission) the each other's Form 10-KSB for the year ended December 31, 2001
as filed with the Commission on April 1, 2002, together with all subsequently
filed Forms 10-Q, 8-K, and filings made with the Commission available at the
EDGAR website (hereinafter referred to collectively as the "Reports").  In
addition, the parties have received from each other such other information
concerning their operations, financial condition and other matters as they
have requested in writing (such information in writing is collectively, the "
Other Written Information"), and considered all factors the parties deem
material in deciding on the advisability of investing in the Securities.

 (b) Information on the Parties.  The Parties are an "accredited investor", as
such term is defined in Regulation D promulgated by the Commission under the
Securities Act of 1933, as amended (the "1933 Act"), are experienced in
investments and business matters, have made investments of a speculative
nature and have purchased securities of United States publicly-owned companies
in private placements in the past and, with their representatives, have such
knowledge and experience in financial, tax and other business matters as to
enable the Parties to utilize the information made available by the Company to
evaluate the merits and risks of and to make an informed investment decision
with respect to the proposed purchase, which represents a speculative
investment.  The Parties have the authority and are duly and legally qualified
to purchase and own the Securities.  The Parties are able to bear the risk of
such investment for an indefinite period and to afford a complete loss
thereof.

 The EMFP shares shall bear the following restrictive legend:

 "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED.  THESE SHARES MAY NOT BE SOLD, OFFERED
FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
STATEMENT UNDER SUCH SECURITIES ACT OR ANY APPLICABLE STATE SECURITIES LAW OR
AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO CENTREX INC. THAT SUCH
REGISTRATION IS NOT REQUIRED.

 This letter of intent is only to explore the possibility of any joint
marketing, joint venture, merger and/or acquisition and does not bind either
party to any further action whatsoever.

 In witness hereof this 30th day of December 2002.

\S\ Douglas Beplate                            \S\ Thomas Coughlin
    Douglas Beplate                                Dr. Thomas Coughlin
    President EMFP                                 CEO CNEXPATCH ENERGY INC

PATCH ENERGY INC.

Suite 600

595 Hornby Street

Vancouver, B.C.   V6C 1A4

 

February 11, 2002

 

Stadnyk Corporate Group Ltd.

Attention:  David Stadnyk

Dear Mr. Stadnyk:

Re:Management Services

The following are the terms and conditions upon which Patch Energy Inc. (the "Company") is prepared to contract with you to provide the services of David Stadnyk to the Company.  By signing this letter agreement you accept the following terms and conditions:

1.Work Duties

1.1The services of Mr. Stadnyk will be provided to carry out such duties and responsibilities as the board of directors may from time to time determine.

2.Term of Employment

2.1The contract shall be for a three year period, starting February 11, 2002 and ending February 11, 2005 provided that this Agreement shall be automatically renewed for successive terms on a year to year basis unless notice of non-renewal is effected by either party with written notice of non-renewal at least 90 days prior to the expiry of the then applicable term of this Agreement, in which case this Agreement will expire on the last day of such term.

3.Consideration

3.1Subject to the other terms and conditions of this Agreement, the Company agrees to pay consideration of US$60,000 per annum for the services provided hereunder, subject to such annual increases as the board of directors shall determine.

3.2Mr. Stadnyk shall also be eligible for incentive compensation in the form of stock options in the Company, in accordance with the policy formulated by the Company from time to time.  Eligibility for stock options shall be determined by the Company's compensation committee.

4.Expenses

4.1In accordance with policies formulated by the Company from time to time, you will be reimbursed for all reasonable travelling and other expenses actually and properly incurred by you in connection with the performance of your duties and functions.  For all such expenses, you will be required to keep proper accounts and to furnish statements and vouchers to the Company within 30 days after the date the expenses are incurred.

5.Service to the Company

5.1During the term of this Agreement, Mr. Stadnyk shall devote such amount of time as shall be reasonably necessary to performing the services hereunder provided that it is acknowledged that it is not intended that Mr. Stadnyk devote the whole of his working time to providing the services hereunder.

6.Confidentiality

6.1All business and trade secrets and confidential information and knowledge which may be acquired during the terms of this Agreement related to the business and affairs of the Company (collectively the "Confidential Information"), will for all purposes and at all times, both during the term of this Agreement and at all times thereafter, be held by you in trust for the exclusive benefit of the Company.  Neither during the term of this Agreement nor at any time thereafter shall such Confidential Information be disclosed to any corporation or person other than the Company, nor will it be used for any purposes other than those expressly authorized by the Company.  This paragraph does not apply to any information which would be found in the public domain.

7.Termination

7.1The following termination and resignation provisions apply to this Agreement:

(a)it may be terminated by you on 30 days' prior written notice to the Company; and

(b)on receipt of such notice, the Company may elect to pay a pro rata portion of the annual compensation provided for hereunder for such 30 days, in which case the Agreement will terminate immediately upon receipt of such payment.

8.Independent Contractor

8.1In performing the services hereunder, it is acknowledged that Mr. Stadnyk is acting as an independent contractor and not as an employee of the Company.

9.Law of the Contract

9.1Any dispute relating to the terms of this Agreement will be resolved pursuant to the laws of the Province of British Columbia.

If you are prepared to accept employment with the Company on the foregoing terms, kindly confirm your acceptance and agreement by signing the enclosed duplicate copy of this letter where indicated and return one copy to us.

We ask you to fully consider all of the above terms and to obtain any advice you feel is necessary, including legal advice, before you execute this Agreement.

Yours very truly,

PATCH ENERGY INC.

/s/ David Stadnyk

Per:_________________________________

Authorized Signatory

 

Accepted and agreed to this 11th day of February, 2002.  I have read and understand the terms and conditions set out in this Letter Agreement.  I have been given full opportunity to consult legal advisors of my choosing.

STADNYK CORPORATE GROUP LTD.

/s/ David Stadnyk

Per:_________________________________

Authorized Signatory

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