(19)

(11)

EP 1 404 786 A1

(12)

(43) Date of publication: 07.04.2004 Bulletin 2004/15 (21) Application number: 02747990.6 (22) Date of filing: 27.06.2002

(51) International Patent Classification (IPC)7: C10M 141/02, C10M 141/06, C10M 173/00 // (C10M141/02, 125:00, 125:10, 129:12, 125:14, 129:06, 129:08, 129:16, 129:93, 129:95), C10M133:08,(C10M141/06, 125:00, 125:10, 129:12, 125:14, 129:06, 129:08, 129:16, 133:52) (86) International application number: PCT/US2002/020394 (87) International publication number: WO 2003/002697 (09.01.2003 Gazette 2003/02)

(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: 29.06.2001 US 302180 P 20.12.2001 US 342734 P (71) Applicant: THE LUBRIZOL CORPORATION Wickliffe,Ohio 44092-2298 (US)	(72) Inventors: MAYHEW, Alexandra Burton on Trent,Staffordshire DE14 3DA (GB) COOK, Stephen, J. Belper, Derbyshire DE56 2LA (GB) CRESSEY, Helena, M. Belper, Derbyshire DE56 1NJ (GB) BARDASZ, Ewa A. Mentor, OH 44060 (US) (74) Representative: Mallalieu, Catherine Louise  D. Young & Co.,21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)