(19)

(11)

EP 0 303 603 A1

(12)

(43) Date of publication: 22.02.1989 Bulletin 1989/08 (21) Application number: 87902335.0 (22) Date of filing: 16.04.1987

(51) International Patent Classification (IPC):  A23K 1/ 10( . ) A23L 1/ 312( . ) A23K 1/ 18( . ) A23L 3/ 34( . ) (86) International application number: PCT/AU1987/000102 (87) International publication number: WO 1987/006432 (05.11.1987 Gazette 1987/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 22.04.1986 AU 19860005570 28.08.1986 AU 19860007719 (71) Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Parkville, VIC 3052 (AU)	(72) Inventors: HAMILTON, Robert, George Wynnum West, QLD 4178 (AU) VAN DOORE, Frank, Joseph Kelvin Grove, QLD 4059 (AU) (74) Representative: Jones, Helen Marjorie Meredith, et al  Gill Jennings & Every, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)