(19)

(11)

EP 1 955 253 A1

(12)

(43) Date of publication: 13.08.2008 Bulletin 2008/33 (21) Application number: 05849297.6 (22) Date of filing: 21.11.2005

(51) International Patent Classification (IPC):  G06G 7/48(2006.01) (86) International application number: PCT/US2005/042470 (87) International publication number: WO 2007/058662 (24.05.2007 Gazette 2007/21)

(84) Designated Contracting States: FR GB IT (71) Applicant: Chevron U.S.A., Inc. San Ramon, CA 94583 (US)	(72) Inventors: GUYAGULER, Baris San Ramon, CA 94583 (US) BYER, James Thomas San Gabriel, CA 91775 (US) (74) Representative: Nash, David Allan  HASELTINE LAKE Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)