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15 June 1999

Johnson Matthey and Clean Diesel Technologies Announce Licence Agreement

Johnson Matthey Catalytic Systems Division and Clean Diesel Technologies, Inc. of Stamford, Connecticut announce that they have concluded a non-exclusive licence under Johnson Matthey's patent rights to its Continuously Regenerating Technology (CRT™). The licence, which involves the payment by Clean Diesel Technology of an undisclosed sum and royalty payments until the expiry of the CRT™ patents, is regarded by Johnson Matthey as confirmation of the importance of its patent rights to its unique CRT™ diesel particulate removal system.

Commenting on the licencing agreement, Neil Carson, Division Director of Johnson Matthey Catalytic Systems Division, said:

"Johnson Matthey's Continuously Regenerating Technology is the system of choice for removing particulates from the exhaust of heavy duty diesel engines. We are making excellent progress with many new products in this field which will enable us to continue to meet the requirements of legislation and the marketplace. This agreement with Clean Diesel Technologies supports our intention to maintain world leadership in diesel exhaust emission control technology".

Jeremy Peter-Hoblyn, President of Clean Diesel Technologies said:

"This licence agreement enhances Clean Diesel Technologies' proprietary position in the use of platinum-based fuel additives for improving the performance of diesel particulate filters and provides customers with a further option in selecting the most suitable diesel emission control technology for their application". He added: "Clean Diesel Technologies is working with Johnson Matthey to develop further technologies that will benefit the environment and we look forward to increased business links in the years to come."

Enquiries:
Johnson Matthey
Neil Carson
Division Director
Catalytic Systems Division
+44 (0)1763 253052

Ian Godwin
Group Public Relations Manager
+44 (0)171 269 8410

Clean Diesel Technologies, Inc.
James Valentine
Chief Operating Officer
(203) 327 7050