(19)

(11)

EP 1 960 725 A2

(12)

(88) Date of publication A3: 20.09.2007 (43) Date of publication: 27.08.2008 Bulletin 2008/35 (21) Application number: 06837381.0 (22) Date of filing: 09.11.2006

(51) International Patent Classification (IPC):  F25J 1/00(2006.01) F25J 3/00(2006.01) (86) International application number: PCT/US2006/043883 (87) International publication number: WO 2007/070198 (21.06.2007 Gazette 2007/25)

(84) Designated Contracting States: FR GB NL (30) Priority: 14.12.2005 US 300802 (71) Applicant: Chevron U.S.A. Inc. San Ramon, CA 94583 (US)	(72) Inventors: SHIPCHANDLER, Arif Katy, TX 77450 (US) RITCHIE, Carolyn, J. Conroe, TX 77302 (US) DANIEL, Jeremiah Houston, TX 77077 (US) (74) Representative: Nash, David Allan et al HASELTINE LAKE Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)