(19)

(11)

EP 2 297 280 A2

(12)

(88) Date of publication A3: 06.05.2010 (43) Date of publication: 23.03.2011 Bulletin 2011/12 (21) Application number: 09794870.7 (22) Date of filing: 03.06.2009

(51) International Patent Classification (IPC):  C10G 31/08(2006.01) C10G 21/27(2006.01) (86) International application number: PCT/US2009/046065 (87) International publication number: WO 2010/005654 (14.01.2010 Gazette 2010/02)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 03.07.2008 US 167466 (71) Applicant: Chevron U.S.A., Inc. San Ramon, CA 94583 (US)	(72) Inventors: GALLUP, Darrell, Lynn Houston TX 77042 (US) SPURRELL, Christopher, Henry Hawthorne CA 90250 (US) YOUNG, Lyman, Arnold Richmond CA 94803 (US) TISH, Paul Fullerton CA 92833 (US) (74) Representative: Nash, David Allan et al Haseltine Lake LLP Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)