(19)

(11)

EP 0 267 274 A1

(12)

(43) Date of publication: 18.05.1988 Bulletin 1988/20 (21) Application number: 87903647.0 (22) Date of filing: 19.05.1987

(51) International Patent Classification (IPC):  A61K 6/ 10( . ) (86) International application number: PCT/US1987/001168 (87) International publication number: WO 1987/007284 (03.12.1987 Gazette 1987/27)

(84) Designated Contracting States: CH DE FR GB LI (30) Priority: 20.05.1986 US 19860865153 20.05.1986 US 19860865114 (71) Applicant: VAN R DENTAL PRODUCTS, INC. Los Angeles, CA 90034 (US)	(72) Inventor: PORTEOUS, Don, D. Los Angeles, CA 90034 (US) (74) Representative: Wilson, Nicholas Martin, et al  WITHERS & ROGERS 4 Dyer's Buildings Holborn London EC1N 2JT London EC1N 2JT (GB)