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EP 2 113 021 A1

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(43) Date of publication: 04.11.2009 Bulletin 2009/45 (21) Application number: 08709441.3 (22) Date of filing: 18.02.2008

(51) International Patent Classification (IPC):  C10M 101/02(2006.01) C10M 107/10(2006.01) C10N 30/10(2006.01) C10M 107/00(2006.01) C10N 30/04(2006.01) C10N 40/25(2006.01) (86) International application number: PCT/GB2008/000554 (87) International publication number: WO 2008/102114 (28.08.2008 Gazette 2008/35)

(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 (30) Priority: 21.02.2007 EP 07250739 (71) Applicant: BP p.l.c. London SW1Y 4PD (GB)

(72) Inventors: AMES, Stephen, Bruce Pepper Pike, Ohio 44124 (US) DAVIES, John, Philip Berkshire RG8 7RP (GB) LIDDY, John, Philip Middlesex TW18 3JA (GB) LIM, Kok-Chye Chelshire CW6 0PY (GB) (74) Representative: Perkins, Nicholas David  BP International Limited Global Patents & Technology Law (Central) Bldg 200, 1st floor Chertsey Road Sunbury-on-Thames, Middlesex TW16 7LN Sunbury-on-Thames, Middlesex TW16 7LN (GB)