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                                                                    Exhibit 10.9

[LETTERHEAD OF NEPHROS]

AMENDMENT TO EMPLOYMENT AGREEMENT

This is an AMENDMENT (the "Amendment") to the Employment Agreement between
Nephros, Inc. ("the Company") and Norman J. Barta ("Executive") dated as of
November 21, 2002 (the "Employment Agreement"). Intending to be legally bound,
the Company and Executive hereby agree as follows:

Paragraph 1 of the Employment Agreement is hereby amended in its entirety to
read as follows:

                  1.   Term.

                       The term of this Agreement shall be the period
           commencing on November 21, 2002, and ending on June 30, 2007 (the
           "Term").

IN WITNESS WHEREOF, the Company has caused this Amendment to be duly executed on
its behalf by its duly authorized agent and Executive has duly executed this
Amendment, all as of May 31, 2004.

NEPHROS, INC.                                   EXECUTIVE

By:  /s/ Eric A. Rose, MD                       /s/ Norman J. Barta
    ------------------------------              --------------------------------
Eric A. Rose, MD                                Norman J. Barta
Chairman of the Board of Directors<PAGE>

                                                                   Exhibit 10.10

             EMPLOYEE PATENT AND CONFIDENTIAL INFORMATION AGREEMENT

      THIS AGREEMENT ("Agreement") is made by and between NEPHROS, INC.
("Employer") and _____________ ("Employee").

      1.    Definitions.

            a. "Company" - The Employer and any corporation or other business
enterprise directly or indirectly controlling, controlled by or under common
control with Nephros, Inc. or otherwise related by equity ownership to (whether
or not controlling, controlled by, or under common control with) Nephros, Inc.
from time to time, whether before or after the execution of this Agreement.

            b. "Customer" - Customers, clients, licensors, licensees, agents,
consultants, suppliers and contractors of the Company.

            c. "Confidential Information" - All information, whether or not
reduced to writing, possessed by the Company or relating to the business of any
actual or demonstrably anticipated research and development of the Company or
its Customers and which gives the Company or any of its Customers an advantage
over competitors who do not know or use it or is otherwise not generally known
in the trade, including, but not limited to, trade secrets, proprietary
information, customer lists and computer programs and software, and including
information conceived, originated or developed by Employee.

            d. "Inventions" - All discoveries, inventions, improvements,
innovations, ideas, concepts and other developments, including, but not limited
to, computer programs and software, relating to the business or any actual or
demonstrably anticipated research or development of the Company made or
conceived by Employee in whole or in part during any period of employment with
the Company, whether alone or with others, and whether or not patentable or
reduced to practice. [It is understood and acknowledged by the Company and
Employee that for purposes of this Agreement, in accordance with California
Labor Code Sections 2870-2872, "Inventions" shall not be deemed to include an
invention for which no equipment, supplies, facility, or trade secret
information of the Company was used and which was developed entirely on the
Employee's own time, and (a) which does not related (1) to the business of the
Company or (2) to the company's actual or demonstrably anticipated research or
development, or (b) which does not result from any work performed by the
Employee for the Company].

      2.    Consideration. This Agreement is entered in consideration of the
hiring or continued employment of the Employee by the Company.

      3.    Purpose. The purpose of this Agreement is to protect the trade
secrets and other proprietary and confidential information of the Company and
the Company's right to certain inventions by Employee, in order to assure the
Company's ability to continue its business and furnish employment to its
employees and to preserve and protect the secrets of the United States
Government, Customers and others which are entrusted to the Company.

<PAGE>

      4.    Confidentiality. The Employee agrees to maintain the confidentiality
of all Confidential Information, both during and subsequent to any periods of
employment with the Company, and Employee will not, without express written
authorization by the Company, directly or indirectly reveal or cause to be
revealed any such Confidential Information to any person other than to Company
employees who are authorized to receive such Confidential Information in order
to perform their duties for the Company, nor will Employee use any such
Confidential Information to the detriment of the Company or its Customers or
other than in the course of his employment with the Company.

      5.    Return of Confidential Material. In the event of the Employees
termination of employment with the Company for any reason whatsoever, the
Employee agrees promptly to deliver to the Company all Confidential Information
and Employee will not take or keep any Confidential Information, whether in its
original form or as copies, upon the termination of his employment.

      6.    Return of Documents. All memoranda notes, notebooks, reports,
drawings, photographs, plans, papers, recordings, tapes, computer discs or other
forms of records made or compiled by or made available to Employee during the
course of his employment, and any abstracts thereof, whether or not they contain
Confidential Information, are and shall be the property of the Company and shall
immediately be delivered by Employee to Company at its request or upon
termination of his employment.

      7.    Assignment of Inventions.

            a. The Employee hereby assigns and transfers to the Company without
further consideration his entire right, title and interest in and to all
Inventions (as defined in this Agreement).

            b. Employee shall disclose any Invention during the period of
employment promptly and fully in writing to Employee's immediate supervisor at
the Company, with a copy to the President of Employer, to enable the Company to
determine whether the Invention is subject to this Agreement, regardless of
whether Employee believes the Invention belongs to him [or is protected by
California Labor Code Section 2870.] To the extent that such Invention may
belong to the Employee, the Company shall protect such disclosures to the same
extent that it protects its own like proprietary information. The Company,
however, shall have no such obligations to the extent such Invention is owned by
the Company.

            c. Employee will, at the Company's request, promptly execute a
written assignment of title to the Company for any Invention required to be
assigned by this Agreement and will preserve any such Invention as Confidential
Information of the Company.

            d. Employee shall, upon request by the Company, assist the Company
or its nominee (at Company's expense) in every reasonable way during and at any
time after Employee's employment to patent and defend the Company's or its
nominee's title to any Inventions in any and all countries, which patents shall
be and remain the sole and exclusive property of the Company or its nominee.

                                       -2-

<PAGE>

      8.    Prior Inventions. It is understood that all inventions, if any
patented or unpatented, which Employee made prior to employment by the Company
are excluded from the scope of this Agreement. The Employee warrants that
Employee has inserted in Schedule A attached hereby and made a part hereof a
complete list of all prior inventions of Employee, if any, including numbers of
all patents, and patent applications, and, in the case of unpatented inventions,
a brief description of all such inventions which are not the property of a
previous employer. Employee further warrants that, if no items are on the list,
Employee has had no such prior inventions. IF NO INVENTIONS, SO INDICATE BY YOUR
INITIALS: ____.

      9.    Extension of Obligations and Agreement to Previous and Future
Employment. The Employee understands and agrees that the provisions of this
Agreement extend also to all previous and future periods of Employee's
employment by the Company and this Agreement shall continue to be in full force
and effect without re-execution in the event Employee transfers between
different employers within the Company, whether or not there are periods between
such transfers during which the Employee is not employed by any employer within
the Company.

      10.   Other Obligations. Employee hereby acknowledges that the Company
from time to time may have agreements with other persons or with the United
States Government which impose obligations or restrictions on the Company
regarding inventions made during the course of work thereunder or regarding the
confidential nature of such work. Employee hereby agrees to be bound by all such
obligations and restrictions and to take all actions necessary to discharge the
obligations of the Company thereunder.

      11.   Trade Secrets and Confidential Information of Others. The Employee
represents and warrants that Employee's performance of all the terms of this
Agreement and as an Employee of the Company does not and shall not breach any
agreement to keep in confidence proprietary or confidential information acquired
by the Employee during a period in which Employee was not employed by the
Company, and Employee further represents and warrants that Employee shall not
disclose to the Company, or induce the Company to use, any proprietary or
confidential information belonging to any previous employer or to others.

      12.   Non-limitation of Rights. This Agreement shall not be construed to
limit in any way any "shop rights" or other common law or contractual right of
the Company by virtue of any previous relationship with the Employee.

      13.   Modification. This Agreement may only be modified or terminated by
an instrument in writing, signed by the Employee and the Company.

      14.   Remedies. Employee and Company acknowledge and stipulate that the
covenants and agreements contained in this Agreement are of a special nature and
that any breach, violation or evasion by Employee of the terms of this Agreement
will result in immediate and irreparable injury and harm to the Company, and
will cause damage to the Company in amounts difficult to ascertain. Accordingly,
the Company shall be entitled to the remedies of injunction and specific
performance, or either of such remedies, as well as to all other legal or
equitable remedies to which the Company may be entitled, including, without
limitation, termination of the employment of Employee.

                                       -3-

<PAGE>

      15.   Entire Agreement. The Employee hereby acknowledges receipt of a
signed counterpart of this Agreement and acknowledges that it is Employee's
entire Agreement with the Company with respect to the subject matter hereof,
thereby superseding any previous oral or written understanding or agreements
with the Company or any officer or representative of the Company. Nothing in
this Agreement shall be deemed to be a contract of employment for a definite
period of time or limit the right of the Company to terminate the employment of
the Employee, with or without cause.

      16.   Severability. In the event that any paragraph or provision of this
Agreement shall be held to be illegal or unenforceable, such paragraph or
provisions shall be severed or otherwise modified as may best preserve the
intention of the parties hereto, and the Agreement as so modified shall remain
in full force and effect.

      17.   Successors and Assigns. This Agreement shall be binding upon
Employee's heirs, executors, administrators and other legal representatives, and
is for the benefit of the Company, it successors and assigns.

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

      IN WITNESS WHEREOF, the parties hereby set their hands as of this ____ day
of _________, ______, and the Employee has completed Schedule A which is set
forth below.

                                         NEPHROS, INC.
-----------------------------------      Employer
Employee

Address:                                 By:
                                            ---------------------------------

-----------------------------------      (Type or Print)
Street                                                  -------------

-----------------------------------      Title:
City, State or Province, Country                ---------

                                       -4-

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                                   SCHEDULE A

      Following is a complete list of all prior inventions of Employee,  if any,
including numbers of all patents, and patent  applications,  and, in the case of
unpatented inventions,  a brief description of all such inventions which are not
the property of a previous employer.

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                                       -5-

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