(19)

(11)

EP 1 499 457 A1

(12)

(43) Date of publication: 26.01.2005 Bulletin 2005/04 (21) Application number: 03719966.8 (22) Date of filing: 29.04.2003

(51) International Patent Classification (IPC)7: B08B 9/00, B08B 9/027, B08B 3/00, B08B 3/14, B08B 7/00, C03C 23/00, C23G 1/00, C23G 1/02 (86) International application number: PCT/US2003/013219 (87) International publication number: WO 2003/092919 (13.11.2003 Gazette 2003/46)

(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 PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 30.04.2002 US 135317 08.04.2003 US 409220 (71) Applicant: Nalco Company Naperville, IL 60563-1198 (US)	(72) Inventors: COOPER, Andrew, J. Oswego, IL 60543 (US) GILL, Jasbir, S. Naperville, IL 60564 (US) GUPTA, Amit Aurora, IL 60504 (US) KELLY, Robert, F. Oswego, IL 60543 (US) KELLY, Douglas, G. Naperville, IL 60564 (US) MYERS, Eric, R. Aurora, IL 60504 (US) (74) Representative: Molyneaux, Martyn William  Harrison Goddard Foote40-43 Chancery Lane London WC2A 1JA London WC2A 1JA (GB)