(19)

(11)

EP 0 524 209 A1

(12)

(43) Date of publication: 27.01.1993 Bulletin 1993/04 (21) Application number: 91906943.0 (22) Date of filing: 10.04.1991

(51) International Patent Classification (IPC):  A61L 33/ 10( . ) A61L 33/ 08( . ) C08G 18/ 64( . ) A61L 33/ 00( . ) C08B 37/ 00( . ) (86) International application number: PCT/CA1991/000120 (87) International publication number: WO 1991/015252 (17.10.1991 Gazette 1991/24)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 10.04.1990 US 19900507230 (71) Applicant: CHEMBIOMED, LTD. Edmonton Alberta T6H 4N9 (CA)	(72) Inventors: MAZID, M., Abdul Edmonton, Alberta T6G 0M5 (CA) UNGER, Frank, M. Edmonton, Alberta T6G OM5 (CA) (74) Representative: Goldin, Douglas Michael, et al  J.A. KEMP & CO. 14, South Square Gray's Inn London WC1R 5LX London WC1R 5LX (GB)