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Exhibit 10.40    
    

[IMMUNICON
LOGO] 

April 15,
2003 

Leon
WMM Terstappen, MD, Ph.D.

1354 Old Ford Road

Huntingdon Valley, PA 19006 

Dear
Leon: 

        This
letter agreement will serve as an amendment and modification of the terms and conditions of your employment, including your employment letter of September 27, 1994, by
Immunicon Corporation ("Immunicon"), and is effective March 20, 2003. 

        1.     In
consideration of your agreement to continue to be employed as Senior Vice President of Research and Development and Chief Scientific Officer, of Immunicon, the Board
of Directors of Immunicon wishes to provide you with salary continuation and certain other benefits, as set forth herein, in the event of a Change of Control of Immunicon (as defined herein), or in
the event you terminate your employment with Immunicon for Good Reason (as defined herein), or other circumstance whereby your employment is terminated by Immunicon for reasons other than cause (as
defined herein). For the purpose of this letter agreement, a "Change of Control" shall mean: (a) the acquisition, directly or indirectly, other than from Immunicon, by any person, entity or
"group" (within the meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), excluding, for this purpose, Immunicon, its subsidiaries,
and any employee benefit plan of Immunicon or its subsidiaries which acquires beneficial ownership of voting securities of Immunicon) (a "Third Party") of beneficial ownership (within the meaning of
Rule 13d-3 promulgated under the Exchange Act) of more than 50% of the combined voting power of Immunicon's then outstanding voting securities entitled to vote generally in the
election of directors; or (b) individuals who, as of March 19, 2003, constitute the Board of Directors of Immunicon (the "Incumbent Directors") cease for any reason to constitute at
least a majority of the Board; provided, that any person becoming a director subsequent to such date whose election, or nomination for election by Immunicon's shareholders, was approved by a vote of
at least a majority of the Incumbent Directors who are directors at the time of such vote shall be, for purposes of this letter agreement, an Incumbent Director; or (c) consummation of
(i) a reorganization, merger or consolidation of Immunicon, or (ii) a liquidation or dissolution of Immunicon or the sale of all or substantially all of the assets of Immunicon (whether
such assets are held directly or indirectly) to a Third Party; except that any event or transaction which would be a "Change of Control" under (a) or (c)(i) of this definition shall not
be a "Change of Control" if persons who were the shareholders of Immunicon immediately prior to such event or transaction (other than the acquiror in the case of a reorganization, merger or
consolidation), immediately thereafter, beneficially own more than 50% of the combined voting power of Immunicon's or the reorganized, merged or consolidated company's then outstanding voting
securities entitled to vote generally in the election of directors. For purposes of this letter agreement you shall be entitled to terminate your employment for "Good Reason" if: (i) Immunicon
or any acquiror or successor assigns to you any duties inconsistent in any material respect with your current position as Senior Vice President of Research and Development and Chief Scientific Officer
(including status, offices, titles and reporting requirements), authority, duties or responsibilities or takes any other action which results in a material diminution in such position as Senior Vice
President of Research and Development and Chief Scientific Officer, authority, duties or responsibilities; or (ii) Immunicon or any acquiror or successor requires you to be based at any office
or location other than the current office or location with Immunicon or a location within a 35 mile radius of such office or location; provided that within fifteen (15) days after the
occurrence of any of the events listed in clauses (i) or (ii), you deliver written notice to Immunicon of your intention to terminate for Good Reason specifying in reasonable detail the facts
and circumstances claimed to give rise to your right to terminate your employment for Good Reason and Immunicon shall not have cured such facts and circumstances within thirty (30) days after
delivery 

 

of
such notice by you to Immunicon (unless Immunicon shall have waived its right to cure by written notice to you). For purposes of this letter agreement, any good faith determination of "Good Reason"
in connection with a Change in Control made by you shall be conclusive. For purposes of this letter agreement, termination of your employment for cause is a termination of your employment by
Immunicon, or any successor thereto or acquiror thereof, as determined in good faith by the Board of Directors, which is due to willful malfeasance or gross negligence in the carrying out of your
duties and responsibilities in the position of Senior Vice President of Research and Development and Chief Scientific Officer of Immunicon, breach of your fiduciary duty to Immunicon, or conviction of
a felony involving a recognized act of moral turpitude under applicable law or a securities or corporate governance law violation. 

        2.     Notwithstanding
the terms and conditions of any stock option agreement or other agreement between you and Immunicon, all restrictions on sale or transfer by you of shares
of Immunicon stock will be removed (except those conditions imposed by law or regulation, such as the Securities Act of 1933, as amended, and the Exchange Act), and all unvested stock options granted
to you under any stock option agreement or otherwise will immediately vest, upon the effective date of a Change of Control of Immunicon, the date of termination of your employment for Good Reason or
the date of notice of termination of your employment by Immunicon for reasons other than termination of your employment for cause, disability or death. 

        3.     Should
you decide to sell any shares of Immunicon stock which are vested as provided in paragraph 2 above, you will notify the Immunicon Board of Directors of such
decision in writing and Immunicon will have the option to purchase such shares from you at the prevailing market price. If the Immunicon common stock is then listed for trading on a national
securities exchange or quoted on an interdealer quotation system, such market price shall be the average of the closing price of the Immunicon common stock on such exchange or system for the five
trading days immediately preceding the date the Board exercises its option, and, otherwise, shall be the market price as established by the Immunicon Board of Directors, within forty-eight
(48) hours after receipt by the Immunicon Board of Directors of such written notice of your intention to sell the shares. In the event the provisions of paragraph 2 above do not apply,
including without limitation in the event you terminate your employment voluntarily, any vested shares or options will be treated in accordance with the applicable stock or option agreement governing
their issuance and any unvested shares or options will be forfeited in the event your employment ceases prior to any vesting date. 

        4.     It
is understood and agreed that an employment-at-will relationship continues to exist between you and Immunicon, and that both you and Immunicon
have the right to terminate the employment relationship at any time for any reason. However, should you be terminated by Immunicon or any acquiror of or successor to Immunicon as a result of a Change
of Control or for reasons other than termination of your employment for cause, or, if you terminate your employment with Immunicon for Good Reason, in addition to the applicability of the foregoing
provisions of this letter agreement you will receive a severance package consisting of a payment equal to twelve (12) months of your base salary at the time of your termination, from the date
notice of termination is given, and such benefits as may be continued for the twelve (12) month period from such termination under the benefit plans of Immunicon or a successor to Immunicon
existing and applicable to you at the time of your termination. Payments not in connection with a Change in Control shall be made in twelve (12) monthly installments; payment in connection with
a Change in Control shall be made in a lump sum. Notwithstanding the foregoing, in the event that during such twelve (12) month period you are employed, or are engaged in the capacity of an
independent contractor or agent, by an entity that reasonably may be considered a competitor of Immunicon, or you otherwise materially breach your non-competition,
non-solicitation or confidentiality obligations to the Company, as determined in good faith by the Immunicon Board of Directors, such benefits will immediately cease as of the date of such 

2

 

employment
or engagement and you shall be required to reimburse Immunicon for the applicable portion of your salary severance payment. 

        5.     Anything
in this letter agreement to the contrary notwithstanding, in the event it shall be determined that any payment or distribution by Immunicon to or for your
benefit (whether paid or payable or distributed or distributable pursuant to the terms of this letter agreement) (a "Payment") would be subject to the excise tax imposed by Section 4999 of the
Internal Revenue Code of 1986, as amended (the "Code"), or any interest or penalties with respect to such excise tax (such excise tax, together with any such interest and penalties, are hereinafter
collectively referred to as the "Excise Tax"), then you shall be entitled to receive an additional payment (a "Gross-Up Payment") in an amount equal to the Excise Tax imposed upon the
Payment. 

        Subject
to the provisions of the next paragraph, all determinations required to be made under this paragraph 5, including whether a Gross-Up Payment is required and
the amount of such Gross-Up Payment, shall be made by an independent accounting firm selected by the Audit Committee of the Board of Directors which may, if in compliance with applicable
law, be the then-current independent auditor of Immunicon (the "Accounting Firm") which shall provide detailed supporting calculations both to Immunicon and you within 15 business days
after the date of termination or such earlier time as is requested by Immunicon. The Gross-Up Payment, if any, shall be paid to you within five days of the receipt of the Accounting Firm's
determination. If the Accounting Firm determines that no Excise Tax is payable by you, it shall furnish you with an opinion that you have substantial authority not to report any Excise Tax on your
federal income tax return. Any determination by the Accounting Firm shall be binding upon Immunicon and you. As a result of the uncertainty in the application of Section 4999 of the Code at the
time of the initial determination by the Accounting Firm hereunder, it is possible that a Gross-Up Payment which will not have been made by Immunicon should have been made
("Underpayment"), consistent with the calculations required to be made hereunder. In the event that Immunicon exhausts
its remedies pursuant to the next paragraph and you thereafter are required to make a payment of any Excise Tax, the Accounting Firm shall determine the amount of the Underpayment that has occurred
and any such Underpayment shall be promptly paid by Immunicon to or for your benefit. 

        You
shall notify Immunicon in writing of any claim by the Internal Revenue Service that, if successful, would require the payment by Immunicon of the Gross-Up Payment. Such
notification shall be given as soon as practicable but no later than ten business days after you know of such claim and shall apprise Immunicon of the nature of such claim and the date on which such
claim is requested to be paid. You shall not pay such claim prior to the expiration of the thirty-day period following the date on which you give such notice to Immunicon (or such shorter
period ending on the date that any payment of taxes with respect to such claim is due). If Immunicon notifies you in writing prior to the expiration of such period that it desires to contest such
claim, you shall: (i) give Immunicon any information reasonably requested by Immunicon relating to such claim; (ii) take such action in connection with contesting such claim as Immunicon
shall reasonably request in writing from time to time, including, without limitation, accepting legal representation with respect to such claim by an attorney reasonably selected by Immunicon;
(iii) cooperate with Immunicon in good faith in order effectively to contest such claim; and (iv) permit Immunicon to participate in any proceedings relating to such claim; provided,
however, that Immunicon shall bear and pay directly all costs and expenses (including additional interest and penalties) incurred in connection with such contest and shall indemnify and hold you
harmless, on an after-tax basis, for any Excise Tax or income tax, including interest and penalties with respect thereto, imposed as a result of such representation and payment of costs
and expenses. Without limitation on the foregoing provisions of this paragraph 5, Immunicon shall control all proceedings taken in connection with such contest and, at its sole option, may
pursue or forgo any and all administrative appeals, proceedings, hearings and conferences with the taxing authority in respect of such claim and may, at its sole option, either direct you to pay the
tax claimed 

3

 

and
sue for a refund or contest the claim in any permissible manner, and you agree to prosecute such contest to a determination before any administrative tribunal, in a court of initial jurisdiction
and in one or more appellate courts, as Immunicon shall determine; provided, however, that if Immunicon directs you to pay such claim and sue for a refund, Immunicon shall advance a portion of such
payment equal to the Gross-Up Payment to you, on an interest-free basis, and shall indemnify and hold you harmless, on an after-tax basis, from any Excise Tax on
the Payment or income tax, including interest or penalties with respect thereto; and further provided that any extension of the statute of limitations relating to payment of taxes for your taxable
year with respect to which such contested amount is claimed to be due is limited solely to such contested amount. Immunicon shall not exercise the foregoing right if such loan would violate applicable
securities laws. Furthermore, Immunicon's control of the contest shall be limited to issues with respect to which a Gross-Up Payment would be payable hereunder and you shall be entitled to
settle or contest, as the case may be, any other issue raised by the Internal Revenue Service or any other taxing authority. 

        If,
after the receipt by you of an amount advanced by Immunicon pursuant to the preceding paragraph, you become entitled to receive any refund with respect to such claim, you shall
(subject to Immunicon's complying with the requirements of the preceding paragraph) promptly pay to Immunicon the amount of such refund (together with any interest paid or credited thereon after taxes
applicable thereto). If,
after the receipt by you of an amount advanced by Immunicon pursuant to the preceding paragraph, a determination is made that you shall not be entitled to any refund with respect to such claim and
Immunicon does not notify you in writing of its intent to contest such denial of refund prior to the expiration of thirty days after such determination, then such advance shall be forgiven and shall
not be required to be repaid and the amount of such advance shall offset, to the extent thereof, the amount of Gross-Up Payment required to be paid. 

        6.     Nothing
in this letter agreement shall prevent or limit your continuing or future participation in any benefit, bonus, incentive or other plans, programs, policies or
practices provided by Immunicon or its subsidiaries and for which you may qualify, nor shall anything herein limit or otherwise affect such rights as you may have under any stock option or other
agreements with Immunicon or any of its subsidiaries. 

        7.     The
terms and conditions set forth in this letter agreement shall supercede, amend and take precedence over the terms and conditions set forth in the employment offer
letter to you dated September 27, 1994, as well as the terms and conditions of any Employee Non-Disclosure Agreement, Non-Compete Agreement and any other agreement
previously entered into by you and Immunicon, to the extent any of the terms and conditions of such offer letter and such other agreements may be inconsistent or in conflict with the terms and
conditions set forth herein. 

        If
you are in agreement with the terms and conditions of this letter agreement, please so indicate by signing and dating this letter agreement as provided below. 

	Sincerely,	 	 
	IMMUNICON CORPORATION	 	 
	

By	
 	

/s/  ZOLA P. HOROVITZ      
	
 	

 
	Zola P. Horovitz, Ph.D.
 Director, Chairman of Compensation Committee	 	 

	Agreed and Accepted:	 	 
	

/s/  LEON WMM TERSTAPPEN, M.D., PH.D.      
 Leon WMM Terstappen, M.D., Ph.D.	
 	

 
	

Date of Signature:	
 	

5-21-03	
 	

 

4

[IMMUNICON
LOGO] 

April 15,
2003 

Leon
WMM Terstappen, MD, Ph.D.

1354 Old Ford Road

Huntingdon Valley, PA 19006 

Dear
Leon: 

        This
letter confirms our recent discussions with respect to the recently-executed severance agreement (the "Agreement") between Immunicon Corporation (the "Company") and you. 

        As
you know, the Agreement calls for certain benefits and cash payments in the event of your separation from the service of the Company in connection with a "change in control" of the
Company (as defined in the Agreement) or if you terminate your employment for "good reason" (as defined in the Agreement). The Agreement also calls for the Company to pay certain taxes otherwise
payable by you with respect to benefits and cash compensation made available to you in connection with a termination event under the Agreement. This "gross up" commitment is intended to make you whole
for taxes imposed on "golden parachute" payments under Sections 280G and 4999 of the Internal Revenue Code of 1986, as amended (the "Code"). 

        As
we have also discussed, however, the Company's payment of your taxes may become expensive to the Company because such payment itself generates additional "gross up" obligations. As a
result, we are writing to memorialize our understanding that it is the parties' intention to take steps that will avoid applicability of the "golden parachute" taxes in the first instance. To that
end, the Company is offering assurance that securing shareholder approval of the payments (using process discussed in §280G(b)(5)(II) of the Code) will be given every reasonable
effort by the Company and that the Company understands that both parties will make all reasonable efforts to avoid applicability of such taxes, in the event of a contemplated transaction. 

        Accordingly,
this letter reflects the understandings and intentions of the parties that the parties will make mutual efforts to attempt to avoid such additional costs to the Company if
it is reasonably possible to do so. 

        Thank
you for your consideration and best wishes for your continued success. 

	 	 	Sincerely yours,
	

 	
 	

IMMUNICON CORPORATION
	

 	
 	

By:	
 	

/s/  ZOLA P. HOROVITZ      

	 	 	Zola P. Horovitz, Ph.D.
 Director, Chairman of Compensation Committee
	

Agreed and acknowledged:	
 	

 	
 	

 
	

/s/  LEON WMM TERSTAPPEN      
	
 	

 	
 	

 

[IMMUNICON® LOGO] 

September 27,
1994 

Leon
WWM Terstappen, MD, Ph.D.

1048 Colorado Place

Palo Alto, CA 94303 

Dear
Leon: 

        I
am delighted to confirm our offer of the executive position of Vice President of Research and Development at Immunicon Corporation, reporting to me. Your responsibilities will include
the scientific and management leadership necessary for the initiation and execution of all research and development strategies that meet the current and anticipated needs of the organization. It has
been agreed that your start date is October 24, 1994. 

        You
will receive a biweekly salary of $5,000, which is $130,000 annually. You may expect to be reviewed for a merit increase on or near your anniversary date. You will be eligible for a
cash performance bonus. When you join Immunicon, you will participate in the Company's non-qualified stock option plan. Subject to formal Board of Directors approval, an immediate 300,000
shares at $0.20/shares, to be vested over five years will be granted. You will receive an additional 100,000 shares at $0.20/share, to vest after mutually suitable milestones have been reached. Should
the company be sold or acquired, all outstanding stock options will be immediately exercisable, regardless of the vesting schedule under which they were granted. 

        Upon
employment, you will also be eligible for the Company's standard benefits package, the details of which are described in our Employee Handbook (copy enclosed). You will also receive
paid holidays and two weeks vacation per year, as business circumstances permit. Additionally, you will receive up to $50,000 reimbursement for eligible expenses associated with your relocation. A
list of eligible expenses is attached. If your total eligible expenses are less than $50,000, you will be reimbursed for the remainder. We expect your new residence to be located within 50 miles of
Immunicon and for the physical move to be completed by January 31, 1995. Travel to and from Palo Alto every two weeks from your start date of October 24, 1994 until the moving date will
be paid by Immunicon and is not part of the $50,000 cap. 

        Immunicon
acknowledges your need to perform a minimum amount of consulting for Becton Dickinson provided that it does not hinder your employment obligations to Immunicon. It is agreed
that the consulting will be limited to a) a total of ten (10) days of work effort which will be accounted for as personal time; and, b) will be limited to subjects of a
non-competitive nature to Immunicon's technology and development plans. The determination of defining "non-competitive" is the responsibility of Immunicon. It is further agreed
that on an ongoing basis we will be kept apprised of all consulting subject matter. 

 

        In
the event that your employment is terminated without cause, the Company would maintain your base salary compensation for a limited period of time from the date at which notice of
termination is given, according to the following schedule: 

	Date of Termination Notice
 
	 	Extent of Severance

	Within 12 months of your effective date of employment	 	12 months base salary, payable in accordance with your established compensation schedule.
	

Months 13 through 18 of employment	
 	

12 months base salary, declining by one month for each month elapsed beyond the first anniversary of your employment, payable in accordance with your established compensation schedule, i.e. termination notice in month 18 of employment will result in
six (6) months of severance.
	

Subsequent to Month 18	
 	

Severance will decline by one month for each six (6) months of employment, i.e. notice of termination in month 24 will result in five (5) months of severance.

        Immunicon
Corporation maintains an employment-at-will relationship with all employees, which means that both you and the Company have the right to end the
employment relationship at any time for any reason. 

        This
offer is contingent upon verification of your education and employment as described in your resume, as well as a background investigation concerning criminal convictions. This offer
is also contingent upon your successful completion of a pre-employment physical and drug screen, which may be arranged by you or handled through the Abington Memorial Occupational Health
Center near Huntingdon Valley. 

        As
a condition of employment you will be asked to sign our standard Employee Non-Disclosure and a Non-Compete Agreement which serves to assign rights and protect
the Company with respect to its intellectual property. 

        Leon,
we look forward with anticipation to your joining Immunicon. We have great confidence in the technical leadership you can bring and contributions you can make. I am personally
excited to our building a close working relationship. 

	Sincerely,	 	 
	

/s/  DOUGLAS A. DOERFLER    

Douglas A. Doerfler
 President and CEO	
 	

 
	

Accepted and Understood:	
 	

 
	

/s/  LEON WWM-TERSTAPPEN, MD, PH.D.      
 Leon WWM-Terstappen, MD, Ph.D.	
 	

April 15, 2003
 Date

2

Eligible Moving Expenses

Prepared for Leon WWM Terstappen, MD, Ph.D.

$50,000 Maximum  

	•
	Closing
costs on your new home.

	•
	Movement
of household goods, to include storage of up to three months if necessary. Up to two autos and one boat may be included.

	•
	Two
househunting trips for you and your wife.

	•
	Commissions
and inspections on selling property.

	•
	Temporary
housing as needed (no later than 1/31/95).

	•
	Transportation
to your new home in the Delaware Valley (self and family).

	•
	"Gross-ups"
of non-deductible expenses. 

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Exhibit 10.40QuickLinks
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Exhibit 10.41    
    

IMMUNICON CORPORATION

3401 Masons Mill Road

Suite 100

HUNTINGDON VALLEY, PA 19006  

 CONSULTING AGREEMENT  

        THIS CONSULTING AGREEMENT is made this 10th day of January, 2000, effective between IMMUNICON CORPORATION ("Immunicon"), a Pennsylvania Corporation,
and Paul A. Liberti, Ph.D., ("Consultant"). 

RECITALS  

        WHEREAS, Immunicon desires to retain Consultant as of January 1, 2000, to advise and consult with Immunicon on the subjects described under
"Duties & Field" in the attached Term Sheet (the "Field"), on the terms set forth herein and Consultant desires to act as a Consultant to Immunicon on such terms. 

        Immunicon
and Consultant desire to confirm, in writing, the terms and conditions of the consultancy. 

        NOW,
THEREFORE, the parties hereto, for the consideration set forth in the foregoing clauses and the mutual covenants and agreements herein contained agree as follows: 

        1.    Engagement as Consultant; Independent Contractor.    Immunicon retains Consultant to consult with and advise
Immunicon, and Consultant accepts such engagement and agrees to provide consulting services hereunder, in accordance with the terms and conditions set forth herein. Consultant shall at all times act
hereunder as an independent contractor and nothing herein shall create or imply a relationship of employer-employee between Immunicon and Consultant. 

        2.    Term.    The term of this Consulting Agreement (the "Term") shall commence as of January 1, 2000, (the
"Effective Date") and shall continue for a period of two years, unless this agreement is sooner terminated in accordance with the provisions of Section 8 hereof and can be renegotiated for an
additional term. 

        3.    Duties and Responsibilities.    During the Term, Consultant agrees to consult with, advise and assist Immunicon
in the Field. Consultant shall not disclose or use during the course of his duties hereunder any information that is the proprietary information of a third party. 

        4.    Extent of Service.    Consultant shall devote the time, attention and energy necessary to fulfill the duties and
responsibilities hereunder. 

        5.    Compensation.    Immunicon will compensate consultant in accordance with the Term Sheet attached here with as
Attachment A and billable monthly. 

        6.    Developments.    Consultant shall disclose fully, promptly and in writing to Immunicon any and all inventions,
discoveries, improvements, modifications and the like, whether patentable or not, which Consultant has conceived, made or developed, solely or jointly with others, while consultant to Immunicon and
which (i) relates to the Field, or (ii) result from or are suggested by the carrying out of Consultant's duties hereunder, or from or by any information which Consultant may receive
while consultant to Immunicon. "Intellectual Property" All Intellectual Property shall belong to Immunicon and consultant shall assign the entire interest in such Intellectual Property to Immunicon;
and shall execute, whenever requested to do so by Immunicon, any and all patent applications, assignments or other instruments, and otherwise provide whatever assistance Immunicon shall deem necessary
to apply for and obtain Letters Patents of the United States, or of any foreign country or otherwise to protect, defend or enforce Immunicon's interest in such Intellectual Property, all without
expense to Consultant. 

        7.    Confidential Information.    Consultant acknowledges that Immunicon owns and will continue to acquire and use
commercially valuable technical and business information which is held secret and confidential by Immunicon and is vital to the success of its business and that Consultant, as a consultant to
Immunicon, may become acquainted with said proprietary information of Immunicon and may contribute thereto, either through inventions, discoveries, improvements, modifications or otherwise (said
information being referred to hereinafter as "Proprietary Information of Immunicon"). Consultant shall maintain in confidence and protect all said Proprietary Information of Immunicon, and, except as
required by the discharge of consultant's duties as a consultant to Immunicon, shall not use, publish, or otherwise disclose or disseminate at any time any of said Proprietary Information of
Immunicon, whether or not developed or contributed to by Consultant, unless such use, publication, disclosure or
dissemination is made with the prior written consent of Immunicon. Nothing contained in this Consulting Agreement shall in any way restrict or impair the Consultant's right to use or disclose
Proprietary Information of Immunicon which: (a) at the time of disclosure is generally available to the public or after the time of disclosure becomes generally available to the public through
no act of the Consultant; (b) was in the Consultant's possession, as documented by written record, prior to the time of disclosure and was not acquired, directly or indirectly, from Immunicon;
or (c) is made available to the Consultant without obligation of confidentiality by others who did not acquire such Proprietary Information of Immunicon directly or indirectly, from Immunicon. 

        8.    Termination.    This Consulting Agreement is valid for the Term. During the term the agreement may be terminated
at any time by mutual agreement and by Immunicon subject to six months notice. The provisions of Paragraph 6 and 7 shall survive termination of this agreement. 

        9.    Contents of Agreement; Assignment.    This Consulting Agreement sets forth the entire understanding of the
parties hereto with respect to the subject matter hereof. All of the rights and obligations of Immunicon under this Consulting Agreement shall be binding upon and inure to the benefit of and be
enforceable by its successors and assigns. Because the duties and responsibilities of Consultant hereunder are of a personal nature, this Consulting Agreement shall neither be assigned nor otherwise
transferred by Consultant in whole or in part. This Consulting Agreement shall be amended only by written instrument duly executed by Immunicon and Consultant. 

        10.    Severability.    If any term of this Consulting Agreement is held to be invalid or unenforceable for any
reason, such term shall be ineffective to the extent of such invalidity or enforceability without invalidating the remaining terms hereof, and this Consulting Agreement shall be construed as if such
invalid or unenforceable term had not been contained herein. 

        11.    Governing Law.    This consulting agreement shall be construed and enforced in accordance with the laws of the
Commonwealth of Pennsylvania applicable to agreements made within and to be performed within Pennsylvania. 

        12.    Notices.    All consents, waivers or other communications that are required or permitted hereunder shall be
sufficient if given in writing and delivered personally or by registered or certified mail, return receipt requested, postage prepaid to Immunicon and Consultant at their respective addresses set
forth below: 

	IMMUNICON CORPORATION	 	Paul A. Liberti, Ph.D.
	

BY	

/s/  EDWARD L ERICKSON      
	
 	

 	

/s/  PAUL A. LIBERTI      

	DATE	1/10/00
	 	DATE	1/10/2000

ATTACHMENT A  

 TERM SHEET FOR CONSULTING AGREEMENT WITH DR. PAUL A. LIBERTI  

        Field & Duties: Consultant will provide advice and assistance to Immunicon broadly in the field of analytical chemistry and methods and general business
matters, serve as a member of the Scientific Advisory Board of Immunicon, chair the Company's Intellectual Property Committee and oversee the Company's patent estate. 

        Term:
The term of Consultant's engagement will be 2 years commencing 1/1/2000 and may be extended by mutual agreement. 

        Compensation:
Consultant will be compensated at the rate of $250/hr with a minimum retainer of $5,000 per month with a maximum amount in any month of $7,000, not including items listed
below. The $7,000 per month figure may be exceeded by agreement in writing from Immunicon. Additionally, following the end of each year during which Consultant has been retained by Immunicon,
Consultant's performance will be evaluated by the Compensation Committee of the Board and Consultant will be
considered for cash/stock option bonus grants at the same time as members of senior management similarly evaluated. Cash bonuses, stock options and any other incentive compensation will be at the sole
discretion of the Compensation Committee of the Board. 

        Other
Items: Consultant may attend two medical/scientific meetings in 2000 as the Company's representative at Immunicon's expense. Consultant and Immunicon will agree the specific
meetings attended. Consultant will be compensated for time spent at such meeting for activities related to Immunicon's interests under the terms above (see "Compensation"). 

        Immunicon
will cover dental and medical insurance for Consultant's through 3/31/2000 and continue dental coverage throughout the term of Consultant's engagement with Immunicon. 

        Immunicon
will continue medical and dental coverage for Consultant's former spouse, Rae Liberti until 3/18/2001 and will cooperate with Consultant and Rae Liberti to seek continuation of
similar coverage beyond 3/18/2001. However, any premiums beyond 3/18/2001 will not be borne by Immunicon. 

        Immunicon
will provide a $100,000 term life insurance policy to Consultant through 12/31/2001 with beneficiaries to be selected by Consultant. 

        Immunicon
will cover Consultant's actual cell phone expenses during the term of his engagement up to $100 per month. 

        Immunicon
will maintain a CompuServe/AOL account or similar service for Consultant during his engagement up to a cost of $100 per month. 

QuickLinks

Exhibit 10.41

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