(19)

(11)

EP 0 144 313 A1

(12)

(43) Date of publication: 19.06.1985 Bulletin 1985/25 (21) Application number: 83902040.0 (22) Date of filing: 13.05.1983

(51) International Patent Classification (IPC):  A61F 2/ 16( . ) (86) International application number: PCT/US1983/000734 (87) International publication number: WO 1984/004450 (22.11.1984 Gazette 1984/27)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (71) Applicant: Levy, Chauncey F. Rochester NY 14621 (US)	(72) Inventor: Levy, Chauncey F. Rochester NY 14621 (US) (74) Representative: Cline, Roger Ledlie, et al  STANLEY, POPPLEWELL, POOLE 57 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)