(19)

(11)

EP 0 484 415 A1

(12)

(43) Date of publication: 13.05.1992 Bulletin 1992/20 (21) Application number: 90911741.0 (22) Date of filing: 01.08.1990

(51) International Patent Classification (IPC):  A61F 13/ 00( . ) A61L 15/ 26( . ) A61L 15/ 58( . ) A61F 13/ 02( . ) A61L 15/ 42( . ) (86) International application number: PCT/GB1990/001194 (87) International publication number: WO 1991/001707 (21.02.1991 Gazette 1991/05)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI NL SE (30) Priority: 03.08.1989 GB 19890017790 (71) Applicant: SMITH & NEPHEW P.L.C. London WC2R 3BP (GB)	(72) Inventors: RAWLINGS, David, Alan Saffron Walden Essex CB11 4TA (GB) BLOTT, Patrick, Lewis Hertfordshire CM23 4ER (GB) (74) Representative: Cole, William Gwyn  Corporate Patents Department Smith and Nephew Research Limited Gilston Park Harlow Essex CM20 2RQ Harlow Essex CM20 2RQ (GB)