(19)

(11)

EP 1 322 734 A1

(12)

(43) Date of publication: 02.07.2003 Bulletin 2003/27 (21) Application number: 01970908.8 (22) Date of filing: 14.09.2001

(51) International Patent Classification (IPC)7: C10M 171/00, C10M 169/04, F01M 11/04, F01N 3/20 // (C10N30/00, 40:25) (86) International application number: PCT/US0128/618 (87) International publication number: WO 0202/4843 (28.03.2002 Gazette 2002/12)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 19.09.2000 US 664834 01.12.2000 US 727622 (71) Applicant: The Lubrizol Corporation Wickliffe, OH 44092-2298 (US)	(72) Inventors: CHAMBERLIN III, William B. Kirtland, OH 44094 (US) PUDELSKI, John K. Cleveland Heights, OH 44118 (US) (74) Representative: Crisp, David Norman et al D. YOUNG & CO.21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)