(19)

(11)

EP 0 525 157 A1

(12)

(43) Date of publication: 03.02.1993 Bulletin 1993/05 (21) Application number: 92905026.0 (22) Date of filing: 21.01.1992

(51) International Patent Classification (IPC):  C10L 1/ 10( . ) C10L 1/ 22( . ) C10L 1/ 223( . ) C10L 10/ 00( . ) C10L 1/ 18( . ) C10L 1/ 24( . ) C10L 1/ 14( . ) C10L 1/ 222( . ) C10L 1/ 238( . ) C10L 1/ 16( . ) C10L 1/ 20( . ) C10L 1/ 30( . ) (86) International application number: PCT/US1992/000472 (87) International publication number: WO 1992/014805 (03.09.1992 Gazette 1992/23)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 15.02.1991 US 19910656937 (71) Applicant: THE LUBRIZOL CORPORATION Wickliffe, Ohio 44092-2298 (US)	(72) Inventors: MOZDZEN, Edward, C. Willoughby, OH 44094 (US) DI BIASE, Stephen, A. Euclid, OH 44132 (US) (74) Representative: Crisp, David Norman, et al  D. YOUNG & CO. 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)