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EP 2 040 848 A1

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(43) Date of publication: 01.04.2009 Bulletin 2009/14 (21) Application number: 06737434.8 (22) Date of filing: 07.03.2006

(51) International Patent Classification (IPC):  B03D 1/14(2006.01) C01G 1/00(2006.01) C01G 1/04(2006.01) (86) International application number: PCT/US2006/008263 (87) International publication number: WO 2007/102819 (13.09.2007 Gazette 2007/37)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK YU (71) Applicant: Marathon Oil Sands (U.S.A.) Inc. Sparks, NV 89431 (US)	(72) Inventors: DUYVESTEYN, Willem, P., C. Reno, Nevada 89511 (US) KIFT, Julian Reno, Nevada 89509 (US) MORLEY, Raymond. L. Sparks, Nevada 98434 (US) (74) Representative: Estreen, Lars J.F.  Bergenstråhle & Lindvall AB P.O. Box 17704 118 93 Stockholm 118 93 Stockholm (SE)