Exhibit 10c ASSIGNMENT AGREEMENT, effective as of November 5, 1997, among PLATINUM PLUS, INC., a Delaware corporation ("PPI"), with a place of business at 300 Atlantic Street, Stamford CT 06901, Fuel-Tech N.V., a Netherlands Antilles limited liability company ("Fuel Tech") with a place of business at Castorweg 22-24, Curacao, Netherlands Antilles, and CLEAN DIESEL TECHNOLOGIES, INC., a Delaware corporation ("Assignee"), with a place of business at 300 Atlantic Street, Stamford CT 06901 U.S.A., WHEREAS, PPI is a wholly-owned subsidiary of Fuel Tech and Fuel Tech owns approximately 28% of the common stock of the Assignee, WHEREAS, by Agreements effective as of October 28, 1994 between the Assignee and Fuel-Tech N.V. (the "NV License") and between the Assignee and PPI (the "PPI License"), the Assignee became the licensee of certain Technology, WHEREAS, subsequent to the effective date of grant of the PPI and NV licenses, the Assignee reimbursed Fuel Tech, of Fuel-Tech, or its affiliates, the amount of approximately $600,000 on account of development expenses incurred by Fuel Tech, Inc. with respect to the Technology licensed under the NV and PPI Licenses, WHEREAS, this Agreement is in consideration of the reimbursed development expenses, WHEREAS, by an Assignment effective as of November 5, 1997 the Fuel-Tech License and the Technology licensed thereunder were assigned by Fuel-Tech N.V. to PPI, WHEREAS, the Technology licensed under the NV and PPI Licenses is now owned by PPI and the Assignee is desirous of taking an assignment of such Technology and PPI is agreeable to granting such assignment while reserving a royalty as provided in the NV and PPI Licenses, WHEREAS, in order to enhance the value of Fuel Techs investment in the Assignee Fuel Tech is agreeable to this assignment and to guaranteeing the performance of the obligations of PPI hereunder, NOW THEREFORE, it is agreed that: 1. Definitions "Affiliate, shall be a company or a business entity which controls, is controlled by, or is under common control with a party to this agreement. "Control" shall mean sufficient voting power to elect the Board of Directors. For purposes of this agreement neither party hereto shall be an Affiliate of the other. 1 "Technology" shall mean PPI's Patents, Marks and Patent Applications set out on Schedule A attached hereto and all associated data, and know-how related thereto owned by PPI for the addition of noble metals to fuels, for emulsions and for Nox control, all as related to internal combustion engines and control of emissions therefrom. "Termination" shall mean December 31, 2008. 2. Assignment 2.1 PPI hereby assigns, transfers and sets over to Assignee and Assignee hereby accepts from PPI, on the terms and conditions herein and subject to the payment to PPI of the royalties described herein when due, all of PPIs right, title and interest whatsoever in the United States of America and any other jurisdiction to the Technology. 3. Revocation of Licenses 3.1 PPI and the Assignee agree that the NV License and the PPI License are hereby revoked and of no further force and affect. 4. Disclaimers and Limited Warranty 4.1 PPI makes no warranty, express or implied, to Assignee concerning the validity or the utility of the Technology or with respect to any other matter, except that PPI represents and warrants that the Patents and Marks assigned hereunder are in full force and effect and that it has full right and power to assign the rights granted hereunder. 4.2 PPI shall have no responsibility whatsoever to Assignee at any time for any liability which Licensee may incur to any third party with respect to the Technology. 5. Royalties: Right to Terminate 5.1 Assignee shall, within 45 days of the end of each calendar year commencing with the year 1998 and thereafter until Termination, pay PPI as a running royalty an amount equal to two and one half percent (2.5%) of annual gross revenues of whatsoever nature, including license fees and royalties, derived from that portion only of the Technology relating to the addition of noble metals to fuels. 5.2 Assignee shall have the right at any time until Termination on thirty days notice to terminate and extinguish its obligation to pay royalties hereunder and 2 to receive a release of such obligation, by the payment to PPI in any calendar year set out below of the amount set out below opposite such year: 1998 $12,000,000.00 1999 $10,909,091.00 2000 $ 9,818,182.00 2001 $ 8,727,273.00 2002 $ 7,636,364.00 2003 $ 6,545,455.00 2004 $ 5,454,546.00 2005 $ 4,363,637.00 2006 $ 3,272,728.00 2007 $ 2,181,819.00 2008 $ 1,090,910.00 6. Obligations of PPI and Fuel Tech 6.1 PPI shall to the extent practicable cooperate with Assignee, at the expense of the Assignee, in perfecting the assignment of the Technology made herein under local law and in preserving and maintaining the Technology by Licensee and shall execute and deliver to the Assignee any further agreements, assignments, instruments, certificates and other documents deemed necessary or appropriate for that purpose by the Assignee. 6.2 Fuel Tech guarantees the performance by PPI of its obligations under Section 6.1 above. 7. Obligations of Assignee 7.1 Assignee shall within 45 days of the end of each calendar year set out in Section 5.2 above furnish PPI with a written report signed by an authorized official setting forth annual gross revenues derived by Assignee from the Technology subject to royalties and, for each such year, shall thereupon make payment of such royalties, if any, as became due to PPI during such year. 7.2 Assignee shall indemnity and defend PPI against any liability or expense arising out of any claim, proceeding or suit by any third party against PPI to the extent that it is based on an allegation that the Technology licensed hereunder is invalid, owned by another party or infringes a patent in force. 7.3 In the event of Assignees failure to pay when due any royalty hereunder, Assignee shall pay to PPI interest on such unpaid royalties at the rate of ten percent (10%) per annum calculated on the basis of days actually elapsed over a year of 360 days. 3 9. General 9.1 This Agreement and its effects are subject to and shall be construed and enforced in accordance with the internal laws of the State of Delaware and any and all claims, controversies or disputes hereunder shall be resolved by negotiations between the parties and, failing such negotiations, shall, on sixty days written notice from one party to the other, be finally settled by arbitration before a single arbitrator in accordance with the rules then in effect of the American Arbitration Association in Stamford Connecticut and any resulting award may be entered in and enforced by any court having jurisdiction. 9.2 This Agreement is the entire agreement between the Parties and may only be amended by an instrument in writing referring to this agreement and signed by each of the parties. 9.3 Notices hereunder shall be effective in five days, if given by pre-paid, registered or certified airmail; and upon delivery, if acknowledged and given by telex, facsimile or personally; in either case to the addresses set forth above for the parties or to such other address as one party may by such notice inform the other. 9.4 Failure to enforce a right or remedy under this Agreement shall not be deemed to constitute a waiver of such right or remedy. 9.5 The obligations hereunder of a party may, from time to time, be performed by an Affiliate of such party. 9.6 All payments hereunder by Assignee to PPI shall be in cash or by wire transfer. 4 IN WITNESS WHEREOF the parties have signed this Agreement as of the date first set out above, PLATINUM PLUS, INC. CLEAN DIESEL TECHNOLOGIES, INC. By: /s/ Jeremy D. Peter-Hoblyn By: /s/ James M. Valentine ---------------------------- ------------------------------- Jeremy D. Peter-Hoblyn James M. Valentine Title: President Title: Executive Vice President Date: December 19, 1997 Date: December 19, 1997 --------------------- --------------------------- FUEL-TECH N.V. By: /s/ Jeremy D. Peter-Hoblyn ----------------------------- Jeremy D. Peter-Hoblyn Title: Managing Director Date: December 19, 1997 ------------------------- State of Connecticut : ) ss Stamford County of Fairfield : The foregoing instrument was acknowledged before me this 19th day of December 1997 by Jeremy D. Peter-Hoblyn, Managing Director of Fuel-Tech N.V., a Netherlands Antilles corporation, Jeremy D. Peter-Hoblyn President of Platinum Plus, Inc., a Delaware corporation, and James M. Valentine, Executive Vice President of Clean Diesel Technologies, Inc., a Delaware corporation, on behalf of their respective corporations. /s/ Charles W. Grinnell ---------------------------------- Charles W. Grinnell Commissioner of the Superior Court Schedule A to Assignment Agreement as of November 5, 1997 among Platinum Plus, Inc., Fuel-Tech N.V. and Clean Diesel Technologies, Inc. CLEAN DIESEL TECHNOLOGIES PATENT ASSETS DOCUMENT INVENTOR(S) ABSTRACT APPLICANT/ ASSIGNEE U.S. 4,629,472 Haney Combustion of emulsified fuels is PPI (P0003C) Sullivan improved by the presence of water- soluble precious metal catalysts. U.S. 4,892,562 Bowers Diesel additives comprising fuel-soluble PPI (P0043A) Sprague compounds of platinum group metals. U.S. 4,891,050 Bowers Gasoline additives comprising fuel- PPI (P0043B) Sprague soluble compounds of platinum group metals. EP 189,642 Bowers Both gasoline and diesel additives FTI (P0042A) Sprague combined in one case for foreign filing. AU* 583,580 FTI CA 1,305,607 FTI CL 36,883 FTI ES 548,951 FTI GB 2,178,757 FTI GR 85.2745 FTI IE 58723 FTNV JP 1,931,532 FTI MX 169,226 FTI VE 49.179 FTI U.S. 5,034,020 Epperly Additional specific fuel-soluble platinum PPI (P0049A) Sprague group metal additives for diesel and gasoline engines. Also claims regenerating catalytic converters and diesel traps. AU 635,056 FTNV CA 612,185 FTNV JP 02-511018 FTNV NO 920199 FTNV - ----------------------- *Country codes in bold italics indicate a patent has been granted in that country. DOCUMENT INVENTOR(S) ABSTRACT APPLICANT/ ASSIGNEE EP 189,642 Bowers Both gasoline and diesel additives FTI (P0042A) Sprague combined in one case for foreign filing AU* 583,580 FTI CA 1,305,607 FTI CL 36,883 FTI ES 548,951 FTI GB 2,178,757 FTI GR 85.2745 FTI CA 612,107 FTNV DK 1125/91 FTNV EP 451207 (AT, BE, CH, DE, ES, FTNV FR, GB, IT, LU, NL, SE) JP 02-502428 FTNV NO 912536 FTNV U.S. 5,404,841 Valentine Emulsified fuel contains water-soluble Not (P1001B) and fuel-soluble platinum group metals assigned or cerium alone or with other metals such as copper, iron or manganese, and urea to reduce NO(2). CL 1259/94 PPI EP 94927236.3 PPI IN 1097/Del/94 PPI MX 946596 PPI TW NI-085549 PPI U.S. 5,584,894 Valentine Emulsions with up to 70% water and PPI (P1001C) Peter-Hoblyn with lubricity additive and catalyst are used for NOx reduction. Urea and other NOx-reducing agents are optional. CA 2,191,755 FTNV EP 95921501.3 FTNV KR 706920/96 FTNV U.S. 5,535,708 Valentine Similar to P1001B, but claims urea PPI (P1001D) equivalents to reduce no(2) DOCUMENT INVENTOR(S) ABSTRACT APPLICANT/ ASSIGNEE U.S. 5,266,083 Peter-Hoblyn PPD permits retarding diesel timing to PPI (P1002A) Valentine reduce NOx by reducing the expected Epperly increase in particulates. AU 674,297 PPI CA 2,123,805 PPI EP 93901333.0 (DE, FR, GB, IT, SE) PPI 08/778.860 Peter-Hoblyn Basic application in this series. PPD CDTI (P1004F) Valentine with an optional second catalytic metal Spraque such as Mn, Fe, Cu, Ce, Li or Na, reduces Epperly Co and HC emissions from trap while moderating oxidation of SO(2) to SO(3). CA 2,149,035 FTNV EP 94901430.2 FTNV JP 512366/1994 FTNV KR 701938/95 FTNV MX 937.003 FTNV 08/760,085 Peter-Hoblyn Second application in this series. CDTI (P1004E) Valentine Copper data is added. Sprague Epperly 08/514,978 Peter-Hoblyn Third case in this series. Adds cerium data. PPI (P1004D) Valentine PCT US96/11908 Sprague Epperly DOCUMENT INVENTOR(S) ABSTRACT APPLICANT/ ASSIGNEE 08/518,251 Peter-Hoblyn PPD is used in combination with a trap PPI (P1009B) and a nox-reducing catalyst and reagent. not available Li and/or Na can be added. New claims (P1009C) specify particulate trap followed by SCR. CL 1009/94 PPI EP 94922518.9 PPI IN 883/Del/94 PPI JP 504646/1995 PPI MX 945.282 PPI TH 023107 PPI TW NI-079182 PPI VE 1424/94 PPI 08/319,620 Peter-Hoblyn Emissions are reduced from two-stroke PPI (P1011A) engines through the use of fuels or motor oils including platinum group metal catalyst which catalyzes a flow-through converter over long periods of operation. IN 1379/Del/94 PPI TH 024351 PPI TW NI-085555 PPI 08/890,145 Peter-Hoblyn Same as P1011A PPI (P1011B) U.S. 5,693,106 Peter-Hoblyn Stability of water-dispersible platinum PPI (P1012B) Valentine compounds and fuel-soluble platinum Sprague compounds are enhanced by addition of a water scavenger or emulsifier. BR PI9606909-0 PPI CA 2,210,256 PPI EP 96902142.7 PPI ID P960085 PPI KR 704820/97 PPI MX 975,258 PPI TH 029654 PPI TW 85100769 PPI ZA 96/0268 PPI DOCUMENT INVENTOR(S) ABSTRACT APPLICANT/ ASSIGNEE U.S. 5,501,714 Valentine Operation of diesel engines with reduced PPI (P1014A) Peter-Hoblyn platinum particulate emission by utilizing a platinum group metal fuel additive and a pass-through catalytic oxidizer. CA not available PPI CN 96192513.2 PPI EP not available PPI IN 399/Del/96 PPI JP 527851/1996 PPI KR 706395/94 PPI MX 966.977 PPI TH 030425 PPI TW 85102341 PPI ZA 96/1657 PPI PCT Valentine Catalytic ceramic cylinder parts for PPI US96/14079 Peter-Hoblyn internal combustion engines. (P1015A) Sprague 08/597,517 Valentine Method and apparatus for reducing harmful CDTI (P1017A) Peter-Hoblyn emissions from a diesel engine by post Spraque combustion catalyst injection. Water- soluble compounds as well as AcAc and soaps are covered. PCT US97/01606 08/626,780 Peter-Hoblyn Urea is catalytically hydrolyzed and/or CDTI (P1018A) pyrolized by diesel SCR. PCT US97/05468 08/747,716 Knapper Operation of diesel engines with emulsions CDTI (P1019A) Tarabulski for reduced NOx emissions by starting Peter-Hoblyn ignition timing at a set point. DOCUMENT INVENTOR(S) ABSTRACT APPLICANT/ ASSIGNEE 08/752,344 Peter-Hoblyn System for fueling and feeding chemicals CDTI (P1020B) Valentine to internal combustion engines for NOx Tarabulski reduction emulsifies chemical solution in the fuel and then separates. 08/772,275 Peter-Hoblyn Method and apparatus for reducing harmful CDTI (P1021A) Balles emissions from a lean-burn engine by urea Hofmann injection SCR at elevated temperature and pressure. 08/321,209 Peter-Hoblyn Reducing NOx emissions from an engine CDTI (P1021C) Balles by temperature-controlled urea injection Hofmann for selective catalytic reduction. Tarabulski 08/792,287 Peter-Hoblyn Bimetallic gasoline additive contains CDTI (P1022A) Valentine rhodium acetylacetonate and a fuel- Sprague soluble platinum compound. 08/826,165 Peter-Hoblyn Reducing NOx emissions from an engine CDTI (P1024A) Balles by on-demand generation of ammonia for Hofmann selective catalytic reduction. 08/831,210 Peter-Hoblyn Reducing NOx emissions from an engine CDTI (P1025A) Valentine by selective catalytic reduction Tarabulski utilizing solid reagents. 08/833,175 Tarabulski Reducing NOx emissions from an engine CDTI (P1026A) while maximizing fuel economy. 60/043,266 Peter-Hoblyn Method for reducing emissions from a CDTI (P1027A) Valentine diesel engine TW 86110574 CDTI DOCUMENT INVENTOR(S) ABSTRACT APPLICANT/ ASSIGNEE 08/868,870 Peter-Hoblyn High-temperature injection of urea for CDTI (P1028A) Tarabulski reducing lean-burn engine no(2) Hofmann emissions by selective catalytic Valentine reduction. 08/854,831 Peter-Hoblyn Low pressure, pyrolization chamber. CDTI (P1029A) Tarabulski Hofmann Balles 08/749,359 Peter-Hoblyn Selective catalytic NOx reduction CDTI (P3034A) utilizing urea with a prechamber to prevent fouling. PCT (not available) 08/215,504 Peter-Hoblyn Enhanced lubricity diesel fuel emulsions NFT (P4006B) Valentine for reduction of nitrogen oxides. Dubin DOCUMENT TRADEMARK APPLICANT 73/506,353 Platinum Plus FTI (T0071A) CN 960088945 CN 960088946 CN 960088947 EP 000195933 FR 95/599379 GB 2,046,018 ID D9616748 ID D9616749 ID J9616750 JP 125415/1995 JP 125416/1995 JP 125417/1995 KR 44777/95 KR 44778/95 KR 11493/95 MX 249,675 MX 249,891 TW 770,817 TW 85034641 T0075A Platinum Plus 2 FTI CA 74/061,007 Clean Diesel Technologies CDTI (T2003A) EP 000345801 75/243,063 LOE-NOX (T2005A) EP 00616532 CDTI KR1 39214/97 KR2 39215/97 KR3 39216/97 TW1 86042764 TW2 86042763 TW3 86042762