(19)

(11)

EP 1 153 160 A1

(12)

(43) Date of publication: 14.11.2001 Bulletin 2001/46 (21) Application number: 00908240.5 (22) Date of filing: 02.02.2000

(51) International Patent Classification (IPC)7: C23G 1/24, C23G 1/19, G21F 9/00 (86) International application number: PCT/US0000/513 (87) International publication number: WO 0046/423 (10.08.2000 Gazette 2000/32)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 05.02.1999 US 245440 28.09.1999 US 407173 (71) Applicant: BetzDearborn Inc Trevose, PA 19053-6783 (US)	(72) Inventors: TIPPETT, Roger, John, Arthur Newtown, PA 18940 (US) SMALL, Terrence, Patrick Aldan, PA 19018 (US) (74) Representative: HOFFMANN - EITLE  Patent- und RechtsanwälteArabellastrasse 4 81925 München 81925 München (DE)