(19)

(11)

EP 0 486 625 A1

(12)

(43) Date of publication: 27.05.1992 Bulletin 1992/22 (21) Application number: 90917894.0 (22) Date of filing: 06.07.1990

(51) International Patent Classification (IPC):  A61L 33/ 00( . ) (86) International application number: PCT/AU1990/000292 (87) International publication number: WO 1991/000745 (24.01.1991 Gazette 1991/03)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 07.07.1989 AU 19890005139 (71) Applicant: MACNAUGHT PTY. LIMITED Turrella, NSW 2205 (AU)	(72) Inventor: HILLS, Brian, Andrew Dumaresq Via Armidale, NSW 2350 (AU) (74) Representative: Sheard, Andrew Gregory, et al  Kilburn & Strode 30, John Street London WC1N 2DD London WC1N 2DD (GB)