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EP 2 212 676 A1

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(43) Date of publication: 04.08.2010 Bulletin 2010/31 (21) Application number: 08852826.0 (22) Date of filing: 14.11.2008

(51) International Patent Classification (IPC):  G01N 21/64(2006.01) G01N 33/34(2006.01) D21H 21/30(2006.01) G01N 21/86(2006.01) G01B 11/06(2006.01) (86) International application number: PCT/US2008/083472 (87) International publication number: WO 2009/067382 (28.05.2009 Gazette 2009/22)

(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: 19.11.2007 US 942065 (71) Applicant: Nalco Company Naperville, IL 60563-1198 (US)	(72) Inventors: THOMAS, James L. Heber Springs Arkansas 72543 (US) CLOT, Olivier Naperville Illinois 60563 (US) BANKS, Rodney H. Aurora Illinois 60502 (US) (74) Representative: Maggs, Michael Norman et al Kilburn & Strode LLP 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)