(19)

(11)

EP 1 009 799 A1

(12)

(43) Date of publication: 21.06.2000 Bulletin 2000/25 (21) Application number: 98937328.7 (22) Date of filing: 05.08.1998

(51) International Patent Classification (IPC)7: C11D 7/54 (86) International application number: PCT/US9816/305 (87) International publication number: WO 9907/818 (18.02.1999 Gazette 1999/07)

(84) Designated Contracting States: CH DE FR GB IT LI SE (30) Priority: 05.08.1997 US 906571 (71) Applicant: Coltene/Whaledent, Inc. Mahwah, New Jersey 07430 (US)	(72) Inventor: WEISS, David, H. Maplewood, NJ 07040 (US) (74) Representative: Gold, Tibor Z. et al Stephenson HarwoodOne, St. Paul's Churchyard London EC4M 8SH London EC4M 8SH (GB)