(19)

(11)

EP 0 027 812 A1

(12)

(43) Date of publication: 06.05.1981 Bulletin 1981/18 (21) Application number: 80900816.0 (22) Date of filing: 02.05.1980

(51) International Patent Classification (IPC):  A61L 33/ 00( . ) (86) International application number: PCT/AU1980/000007 (87) International publication number: WO 1980/002378 (13.11.1980 Gazette 1980/26)

(84) Designated Contracting States: CH DE FR GB LI NL SE (30) Priority: 03.05.1979 AU 19790008648 (71) Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Campbell, Australian Capital Territory 2601 (AU)	(72) Inventors: McAUSLAN, Bryan Richard North, N.S.W., 2074 (AU) HOFFMAN, Hyam Judah Woolstonecraft, N.S.W. 2065 (AU)