(19)

(11)

EP 0 541 779 A1

(12)

(43) Date of publication: 19.05.1993 Bulletin 1993/20 (21) Application number: 92913124.0 (22) Date of filing: 26.05.1992

(51) International Patent Classification (IPC):  C10L 1/ 14( . ) C10L 1/ 23( . ) C10L 10/ 18( . ) C10M 141/ 06( . ) C10M 163/ 00( . ) C10M 169/ 04( . ) C10N 20/ 04( . ) C10N 40/ 26( . ) C10L 1/ 22( . ) C10L 10/ 08( . ) C10M 133/ 00( . ) C10M 159/ 12( . ) C10M 167/ 00( . ) C10N 20/ 02( . ) C10N 30/ 04( . ) F02B 75/ 02( . ) (86) International application number: PCT/US1992/004410 (87) International publication number: WO 1992/021736 (10.12.1992 Gazette 1992/31)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 30.05.1991 US 19910707724 (71) Applicant: THE LUBRIZOL CORPORATION Wickliffe, Ohio 44092-2298 (US)	(72) Inventor: CHAMBERLIN, William, B., III Kirtland, OH 44094 (US) (74) Representative: Vossius, Volker, Dr., et al  Dr. Volker Vossius, Patentanwaltskanzlei - Rechtsanwaltskanzlei, Holbeinstrasse 5 D-81679 München D-81679 München (DE)