(19)

(11)

EP 1 875 227 A1

(12)

(43) Date of publication: 09.01.2008 Bulletin 2008/02 (21) Application number: 05735357.5 (22) Date of filing: 14.04.2005

(51) International Patent Classification (IPC):  G01N 31/22(2006.01) G01N 33/28(2006.01) (86) International application number: PCT/US2005/012936 (87) International publication number: WO 2006/112827 (26.10.2006 Gazette 2006/43)

(84) Designated Contracting States: DE FR GB (71) Applicant: The Lubrizol Corporation Wickliffe OH 44092-2298 (US)	(72) Inventors: RICHARDSON, Robert, C. Tomball, TX 77375 (US) VICKERMAN, Richard, J. Stow, OH 44224 (US) BAKER, Mark, R. Lyndhurst, OH 44124 (US) TAYLOR, Gregory, D. Madison, OH 44057 (US) (74) Representative: Bradley, Josephine Mary  D Young & Co 120 Holborn London EC1N 2DY London EC1N 2DY (GB)