(19)

(11)

EP 0 512 016 A1

(12)

(43) Date of publication: 11.11.1992 Bulletin 1992/46 (21) Application number: 91903139.0 (22) Date of filing: 28.01.1991

(51) International Patent Classification (IPC):  A61F 5/ 44( . ) A61F 13/ 15( . ) (86) International application number: PCT/GB1991/000117 (87) International publication number: WO 1991/011161 (08.08.1991 Gazette 1991/18)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI NL SE (30) Priority: 27.01.1990 GB 19900001917 (71) Applicant: Smith & Nephew plc London WC2R 3BP (GB)	(72) Inventor: BLOTT, Patrick Lewis Bishops Stortford, Herts CM23 4ER (GB) (74) Representative: Cole, William Gwyn, et al  Corporate Patents Department Smith and Nephew Research Limited Gilston Park Harlow Essex CM20 2RQ Harlow Essex CM20 2RQ (GB)