Exhibit 10.151
                                 --------------


                              AMENDED AND RESTATED
                          PATENT COLLATERAL ASSIGNMENT

         This  Amended  and  Restated   Patent   Collateral   Assignment   (this
"Agreement")  is made this 12th day of April,  2005,  by and  between  COMMODORE
APPLIED  TECHNOLOGIES,  INC.  ("Assignor"),  which maintains an address at Suite
3238,  150 East 58th  Street,  New  York,  New York;  and THE SHAAR  FUND,  LTD.
("Secured  Party"),  which  maintains an address at c/o SS&C Fund Services N.V.,
Pareraweg 45, Curacao, Netherlands Antilles.


                                BACKGROUND FACTS

         Assignor has executed and delivered a 10% Convertible Secured Note (the
"Note") to the Secured Party in the aggregate  principal  amount of Four Million
Six Hundred  Thousand Seven Hundred  Thirty-Three  ($4,600,733)  Dollars and has
entered into an Amended and Restated Security  Agreement,  of even date herewith
("Security  Agreement"),  with the Secured Party. In order to induce the Secured
Party to execute  and deliver the  Security  Agreement  and to make the loan and
future  advances under the Note,  Assignor has agreed,  inter alia, to assign to
Secured Party certain patent rights.

         NOW,  THEREFORE,  in  consideration  of the premises,  Assignor  hereby
agrees with Secured Party as follows:

         1. To secure the complete and timely  satisfaction of all  Obligations,
Assignor  hereby grants,  assigns and conveys to Secured Party the entire right,
title and  interest  in and to the patent  applications  and  patents  listed in
Schedule A hereto,  including without  limitation all proceeds thereof (such as,
by way of example,  license royalties and proceeds of infringement  suits),  the
right  to  sue  for  past,   present  and  future   infringements,   all  rights
corresponding  thereto  throughout  the  world  and  all  reissues,   divisions,
continuations,    renewals,   extensions   and   continuations-in-part   thereof
(collectively, the "Patents"). Terms used herein but not otherwise defined shall
have the meanings given to such terms in the Security Agreement and the Note.

         2. Assignor represents, warrants and covenants that:

         (a) The Patents are  subsisting  and have not been adjudged  invalid or
unenforceable, in whole or in part and such Patents represent all of the Patents
owned by Assignor;

         (b) To the best of Assignor's  knowledge,  each of the Patents that has
been issued is valid and enforceable;

                                       1
<PAGE>

         (c)  Assignor  is the  sole  and  exclusive  owner  of the  entire  and
unencumbered  right, title and interest in and to each of the Patents,  free and
clear of any liens,  charges  and  encumbrances,  including  without  limitation
pledges, assignments, licenses, shop rights and covenants by Assignor not to sue
third persons; and

         (d) Assignor has the unqualified right to enter into this Agreement and
perform its terms.

         3. Assignor  agrees that until all of the  Obligations  shall have been
satisfied in full, it will not enter into any agreement (for example,  a license
agreement)  which  is  inconsistent  with  Assignor's   obligations  under  this
Agreement, without Secured Party's prior written consent.

         4. If,  before  the  Obligations  shall  have been  satisfied  in full,
Assignor  shall  obtain  rights  to any new  patentable  inventions,  or  become
entitled to the  benefit of any patent  application  or patent for any  reissue,
division, continuation, renewal, extension or continuation-in-part of any Patent
or  any  improvement  on  any  Patent,  the  provisions  of  paragraph  1  shall
automatically  apply  thereto and  Assignor  shall give to Secured  Party prompt
notice thereof in writing hereof.

         5.  Assignor  authorizes  Secured  Party to modify  this  Agreement  by
amending Schedule A to include any future patents and patent  applications which
are Patents under  paragraph 1 or paragraph 4 hereof.  Secured Party  authorizes
Assignor  to abandon any of the Patents  if, in  Assignor's  sole and  exclusive
determination,  such Patent is not commercially viable. Provided,  however, that
Assignor  shall give Secured Party not less than thirty (30) days written notice
of its intention to abandon any such Patent  whereupon  Secured Party may assume
the unconditional ownership of such Patent at its sole cost and expense.

         6. Unless and until  there shall have  occurred  and be  continuing  an
Event of  Default,  Secured  Party  hereby  grants to  Assignor  the  exclusive,
nontransferable  right and license under the Patents to make,  have made for it,
use, sell and have sold the inventions  disclosed and claimed in the Patents for
Assignor's  own benefit and account and for none other.  Assignor  agrees not to
sell or assign its  interest  in, or grant any  sublicense  under,  the  license
granted to Assignor in this  paragraph 6, without the prior  written  consent of
Secured Party, which consent shall not be unreasonably withheld.

         7. If any Event of Default shall have occurred and be  continuing,  and
in  addition  to and not in lieu of any  rights or  remedies  granted to Secured
Party in the event of default as set forth in the Security  Agreement,  which is
deemed  incorporated  herein by reference and which such rights and remedies may
be exercised  cumulatively  by Secured Party,  the Secured Party may transfer or
assign  Assignor's  license  under the Patents as set forth in paragraph 6, upon
thirty (30) days written  notice to Assignor,  and Secured  Party shall have, in
addition to all other  rights and  remedies  given it by this  Agreement,  those
allowed by law and the rights and remedies of a secured  party under the Uniform
Commercial  Code as  enacted in any  jurisdiction  in which the  Patents  may be

                                       2
<PAGE>

located and, without limiting the generality of the foregoing, the Secured Party
may immediately,  without demand of performance and without other notice (except
as set forth below) or demand  whatsoever  to Assignor,  all of which are hereby
expressly waived, and without  advertisement,  sell at public or private sale or
otherwise  realize upon, in New York, New York, or elsewhere,  the whole or from
time to time any part of the  Patents,  or any  interest  which the Assignor may
have therein, and after deducting from the proceeds of sale or other disposition
of the Patents all expenses (including all reasonable expenses for brokers' fees
and legal services), shall apply the residue of such proceeds toward the payment
of the  Obligations.  Any remainder of the proceeds after payment in full of the
Obligations  shall be paid  over to the  Assignor.  Notice  of any sale or other
disposition  of the Patents shall be given to Assignor at least twenty (20) days
before the time of any intended  public or private sale or other  disposition of
the Patents is to be made,  which  Assignor  hereby  agrees shall be  reasonable
notice of such sale or other disposition. At any such sale or other disposition,
Secured Party may, to the extent  permissible under applicable law, purchase the
whole or any part of the Patents sold,  free from any right of redemption on the
part of Assignor, which right is hereby waived and released.

         8. If any Event of  Default  shall  have  occurred  and be  continuing,
Assignor hereby  authorizes and empowers  Secured Party to make,  constitute and
appoint any officer or agent of Secured  Party,  as Secured  Party may select in
its exclusive discretion,  as Assignor's true and lawful attorney-in-fact,  with
the power to endorse Assignor's name on all applications,  documents, papers and
instruments necessary for Secured Party to use the Patents, or to grant or issue
any exclusive or nonexclusive  license under the Patents to any third person, or
necessary  for Secured  Party to assign,  pledge,  convey or otherwise  transfer
title in or dispose of the Patents to any third person. Assignor hereby ratifies
all that such attorney  shall  lawfully do or cause to be done by virtue hereof.
This power of attorney shall be irrevocable for the life of this Agreement.

         9. At  such  time  as  Assignor  shall  completely  satisfy  all of the
Obligations,  this Agreement shall terminate and Secured Party shall execute and
deliver to  Assignor  all deeds,  assignments  and other  instruments  as may be
necessary or proper to re-vest in Assignor full title to the Patents, subject to
any  disposition  thereof  which may have been made by  Secured  Party  pursuant
hereto.

         10. Any and all fees,  costs and expenses,  of whatever kind or nature,
including the reasonable  attorney's fees and legal expenses incurred by Secured
Party in  connection  with  the  preparation  of this  Agreement  and all  other
documents  relating hereto and the consummation of this transaction,  the filing
or recording of any documents  (including all taxes in connection  therewith) in
public offices, the payment or discharge of any taxes, counsel fees, maintenance
fees,  encumbrances  or otherwise  protecting,  maintaining  or  preserving  the
Patents,  shall be borne and paid by  Assignor  on demand by  Secured  Party and
until so paid  shall be added to the  principal  amount of the  Obligations  and
shall bear interest at the highest rate prescribed in the Note.


                                       3
<PAGE>

         11. Subject to Assignor's rights to voluntarily  abandon any Patent, as
set forth in Section 5 hereof,  Assignor  shall have the duty,  through  counsel
reasonably  acceptable  to Secured  Party,  to prosecute  diligently  any patent
applications  of the  Patents  pending  as of the  date  of  this  Agreement  or
thereafter  until the  Obligations  shall have been paid in full to preserve and
maintain all rights in patent applications and patents of the Patents, including
without limitation the payment of all maintenance fees. Any expenses incurred in
connection with such an application shall be borne by Assignor.

         12.  Assignor shall have the right,  with the consent of Secured Party,
which shall not be unreasonably  withheld, to bring suit in its own name, and to
join Secured  Party,  if  necessary,  as a party to such suit so long as Secured
Party  is  satisfied  that  such  joinder  will  not  subject  it to any risk of
liability,  to enforce the Patents and any licenses  thereunder.  Assignor shall
promptly,  upon demand,  reimburse and indemnify  Secured Party for all damages,
costs and expenses,  including legal fees, incurred by Secured Party pursuant to
this Agreement and the Security Agreement.

         13 No course of dealing  between  Assignor and Secured  Party,  nor any
failure to exercise, nor any delay in exercising,  on the part of Secured Party,
any right,  power or privilege  hereunder or under the Security  Agreement shall
operate as a waiver  thereof;  nor shall any single or partial  exercise  of any
right, power or privilege  hereunder or thereunder preclude any other or further
exercise thereof or the exercise of any other right, power or privilege.

         14. All of Secured  Party's  rights and  remedies  with  respect to the
Patents,  whether  established  hereby or by the Security  Agreement,  or by any
other  agreements or by law shall be cumulative and may be exercised  singularly
or concurrently.

         15. The provisions of this  Agreement are severable,  and if any clause
or provision shall be held invalid and  unenforceable in whole or in part in any
jurisdiction,  then such invalidity or  unenforceability  shall affect only such
clause or provision, or part thereof, in such jurisdiction, and shall not in any
manner affect such clause or provision in any other jurisdiction,  or any clause
or provision of this Agreement in any jurisdiction.

         16. This Agreement is subject to modification  only by a writing signed
by the parties, except as provided in paragraph 5.

         17. The  benefits  and  burdens of this  Agreement  shall  inure to the
benefit of and be binding upon the respective  successors and permitted  assigns
of the parties.

         18. The validity and  interpretation  of this  Agreement and the rights
and obligations of the parties shall be governed by the laws of the State of New
York.


              (THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK)


                                       4
<PAGE>

         IN WITNESS WHEREOF,  the parties have executed this Agreement as of the
date first above written.


                                 ASSIGNOR:

                                 COMMODORE APPLIED
                                   TECHNOLOGIES, INC.


                                 By: /s/ James M. DeAngelis
                                     -----------------------
                                     James M. DeAngelis
                                     Chief Financial Officer

                                 SECURED PARTY:

                                 THE SHAAR FUND, LTD.

                                 By: SS&C Fund Services BVI


                                 By: /s/ Maarten Robberts
                                     ---------------------
                                     Name:  Maarten Robberts
                                     Title:    Director


                                 By: /s/ Peter Ijsseling
                                     -------------------
                                     Name: Peter Ijsseling
                                     Title:   Director


STATE OF RHODE ISLAND      )
                           ) SS:
COUNTY OF NEWPORT          )

         On this 9th day of April,  2005,  before me, a Notary Public in and for
the jurisdiction aforesaid, personally appeared James M. DeAngelis, to me known,
who being by me duly  sworn,  did depose and say that he is the Chief  Financial
Officer of Commodore Applied Technologies,  Inc., and that he is duly authorized
to execute same; and that he subscribed,  swore to and  acknowledged the same in
his capacity as such officer and as the  authorized  and binding act and deed of
said corporation.

                                 /s/ Elena Perkins - Bank of America
                                 -----------------------------------
                                 Notary Public



                                       5
<PAGE>

                         PATENTS AND PATENT APPLICATIONS
                      COMMODORE APPLIED TECHNOLOGIES, INC.
                                PATENT PORTFOLIO
                                (March 22, 2005)
<TABLE>
<CAPTION>

------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
  Case       Country                              Title                   Filed        Issued       Patent No./        Pending/
 Number                                                                                             Serial No.          Action
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
<S>           <C>             <C>                                          <C>         <C>          <C>              <C>
SPP:103 US    United States   PROCESSES FOR DECONTAMINATING POLLUTED       03/30/1987  08/01/1989   4,853,040        Maintenance
                              SUBSTRATES                                                                             fees paid-
                                                                                                                     Expires 8/01/06
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:104 US    United States   EXPANDED "SET" PROCESSES                     07/27/1989  05/05/1992   5,110,364        Expires 7/27/09
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:111 EA    Eurasia         DESTRUCTION OF CHEMICAL WARFARE AGENTS       06/08/1998  10/10/1996   000631
              (Russia)        (CHEM DEMIL)
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:111 KW    Kuwait                       "                   "           11/02/1996               PA 134/96        Pending
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:111 LY    Libya                        "                   "           11/07/1996               428/96           Pending
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:111 SA    Saudi Arabia                 "                   "           11/27/1996               96 17 0460       Pending
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:111 US    United States                "                   "           04/16/1998  12/07/1999   5,998,691
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:112 PK    Pakistan                     "                   "           12/11/1997  12/11/1997   136,129
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:112 US    United States                "                   "           06/10/1999  09/19/2000   6,121,506
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:114 CA    Canada          METHOD FOR REMEDIATING SITES CONTAMINATED    02/10/2000  08/24/2004   2,362,469
                              WITH TOXIC WASTE (IMPROVED SET PROCESS)
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:114 EP    Europe                       "                    "          02/10/2000               00 921 323.2     Pending
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:114 IL    Israel                       "                    "          08/09/2001               144,825          Pending
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:114 JP    Japan                        "                    "          08/13/2001               2000-599038      Pending
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:114 MX    Mexico                       "                    "          08/07/2001               PA/a/2001007958  Pending
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:114 US    United States                "                    "          02/11/1999  04/11/2000   6,049,021
------------- --------------- -------------------------------------------- ----------- ------------ --------------------------------
SPP:115 US    United States     METHOD FOR OXIDIZING ORGANOPHOSPHORUS      05/27/2003               6,570,048
                                COMPOUNDS (PEROXYSULFATES)
------------- ----------------- -----------------------------------------  ----------- ------------ --------------------------------
SPP:119 US    United States     DEACTIVATION OF METAL LIQUID COOLANTS      04/04/2000  01/16/2001   6,175,051
                                USED IN NUCLEAR REACTOR SYSTEMS
------------- ----------------- -----------------------------------------  ----------- ------------ --------------------------------


</TABLE>


                 End of Description of Collateral and Exhibit A.


                                       6