(19)

(11)

EP 2 176 446 A1

(12)

(43) Date of publication: 21.04.2010 Bulletin 2010/16 (21) Application number: 08796596.8 (22) Date of filing: 25.07.2008

(51) International Patent Classification (IPC):  C23C 22/66(2006.01) C23F 11/18(2006.01) F28F 19/02(2006.01) C23C 22/68(2006.01) C09K 5/20(2006.01) (86) International application number: PCT/US2008/071123 (87) International publication number: WO 2009/018123 (05.02.2009 Gazette 2009/06)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 02.08.2007 US 953626 P (71) Applicants: Chevron U.S.A., Inc. San Ramon, CA 94583 (US) Caterpillar, Inc. Peoria, IL 61629 (US)	(72) Inventors: PELLET, Regis J. Croton-on-Hudson New York 10520 (US) CLAEYS, Sandra G. B-9920 Lovendegem (BE) LIEVENS, Serge S. B-9820 Merelbeke (BE) HUNSICKER, Douglas P. Peoria, Illinois 61606 (US) (74) Representative: Nash, David Allan  Haseltine Lake LLP Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)