(19)

(11)

EP 2 588 583 A2

(12)

(88) Date of publication A3: 15.03.2012 (43) Date of publication: 08.05.2013 Bulletin 2013/19 (21) Application number: 11803960.1 (22) Date of filing: 02.05.2011

(51) International Patent Classification (IPC):  C10M 169/02(2006.01) C10M 123/04(2006.01) C10M 117/00(2006.01) C10M 119/00(2006.01) (86) International application number: PCT/US2011/034750 (87) International publication number: WO 2012/005799 (12.01.2012 Gazette 2012/02)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (30) Priority: 30.06.2010 US 827151 (71) Applicant: Chevron U.S.A. Inc. San Ramon, CA 94583 (US)	(72) Inventor: BERET, Samil Danville, California 94526 (US) (74) Representative: Nash, David Allan  Haseltine Lake LLP Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)