(19)

(11)

EP 1 620 531 A1

(12)

(43) Date of publication: 01.02.2006 Bulletin 2006/05 (21) Application number: 04760563.9 (22) Date of filing: 20.04.2004

(51) International Patent Classification (IPC):  C10L 1/32(1968.09) C10L 1/10(1968.09) C10L 1/14(1968.09) (86) International application number: PCT/US2004/012186 (87) International publication number: WO 2004/099350 (18.11.2004 Gazette 2004/47)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 30.04.2003 US 466578 P (71) Applicant: The Lubrizol Corporation Wickliffe, OH 44060-3980 (US)	(72) Inventors: HOBSON, David Belper Derbyshire DE56, 1QE (GB) PSAILA, Alex Caterham Surrey CR3 5FP (GB) DI BIASE, Stephen A. Lakewood, OH 44107 (US) (74) Representative: Weber, Thomas  Patentanwälte von Kreisler-Selting-Werner, Deichmannhaus am Dom 50667 Köln 50667 Köln (DE)