(19)

(11)

EP 0 863 963 A1

(12)

(43) Date of publication: 16.09.1998 Bulletin 1998/38 (21) Application number: 96929812.0 (22) Date of filing: 30.08.1996

(51) International Patent Classification (IPC):  C10G 47/ 00( . ) C10G 45/ 50( . ) C10G 45/ 64( . ) C10G 45/ 46( . ) C10G 45/ 60( . ) C10G 65/ 12( . ) (86) International application number: PCT/US1996/013945 (87) International publication number: WO 1997/018278 (22.05.1997 Gazette 1997/22)

(84) Designated Contracting States: BE DE ES FR GB IT NL (30) Priority: 14.11.1995 US 19950557470 (71) Applicant: MOBIL OIL CORPORATION Fairfax, Virginia 22037-0001 (US)	(72) Inventors: BIXEL, John, Clarence Newtown, PA 18940 (US) CARROLL, Michael, Brian Mantua, NJ 08051 (US) SMITH, Fritz, Arthur New Hope, PA 18938 (US) (74) Representative: Jones, Helen Marjorie Meredith  Gill Jennings & Every, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)