(19)

(11)

EP 0 151 621 A1

(12)

(43) Date of publication: 21.08.1985 Bulletin 1985/34 (21) Application number: 84903020.0 (22) Date of filing: 23.07.1984

(51) International Patent Classification (IPC):  C10L 1/ 222( . ) C10L 1/ 24( . ) C10M 133/ 18( . ) C10L 1/ 224( . ) C10M 133/ 08( . ) C10M 135/ 24( . ) (86) International application number: PCT/US1984/001187 (87) International publication number: WO 1985/000620 (14.02.1985 Gazette 1985/04)

(84) Designated Contracting States: DE FR GB (30) Priority: 29.07.1983 US 19830518505 29.07.1983 US 19830518506 (71) Applicant: CHEVRON RESEARCH AND TECHNOLOGY COMPANY San Francisco, CA 94120 (US)	(72) Inventor: CAMPBELL, Curtis, B. Rodeo, CA 94572 (US) (74) Representative: Kosmin, Gerald Emmanuel, et al  HASELTINE, LAKE & CO. Hazlitt House 28 Southampton Buildings Chancery Lane London, WC2A 1AT London, WC2A 1AT (GB)