(19)

(11)

EP 0 168 461 A1

(12)

(43) Date of publication: 22.01.1986 Bulletin 1986/04 (21) Application number: 85900704.0 (22) Date of filing: 21.01.1985

(51) International Patent Classification (IPC):  A61B 5/ 022( . ) A61B 5/ 0285( . ) A61B 5/ 0245( . ) A61B 5/ 0456( . ) (86) International application number: PCT/GB1985/000030 (87) International publication number: WO 1985/003211 (01.08.1985 Gazette 1985/17)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 20.01.1984 GB 19840001500 (71) Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY London EC1N 8JP (GB)	(72) Inventor: HAWKINS, Peter Bristol BS16 IPS (GB)