(19)

(11)

EP 0 573 496 A1

(12)

(43) Date of publication: 15.12.1993 Bulletin 1993/50 (21) Application number: 92905500.0 (22) Date of filing: 26.02.1992

(51) International Patent Classification (IPC):  C10L 1/ 08( . ) F02B 3/ 06( . ) (86) International application number: PCT/AU1992/000083 (87) International publication number: WO 1992/014804 (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: 26.02.1991 AU 19910004805 (71) Applicant: CENTURY OILS AUSTRALIA PTY LIMITED Wickham, NSW 2293 (AU)	(72) Inventor: LEEMING, Philip, Joseph Merewether Heights, NSW 2291 (AU) (74) Representative: Harding, Charles Thomas, et al  D. Young & Co. 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)