(19)

(11)

EP 0 607 120 A1

(12)

(43) Date of publication: 27.07.1994 Bulletin 1994/30 (21) Application number: 90915067.0 (22) Date of filing: 12.10.1990

(51) International Patent Classification (IPC):  A23C 7/ 04( . ) A23L 1/ 32( . ) C11B 3/ 00( . ) A23L 1/ 015( . ) C08B 37/ 16( . ) C11B 11/ 00( . ) (86) International application number: PCT/AU1990/000489 (87) International publication number: WO 1991/011114 (08.08.1991 Gazette 1991/18)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 23.01.1990 AU 19900008308 17.05.1990 AU 19900055112 (71) Applicant: COMMONWEALTH SCIENTIFIC & INDUSTRIAL RESEARCH ORGANISATION ( C.S.I.R.O. ) Campbell ACT 2601 (AU)	(72) Inventors: OAKENFULL, David, George Wahroonga, NSW 2076 (AU) SIDHU, Gurcharn, Singh North Ryde, NSW 2113 (AU) ROONEY, Michael, Laurence Lane Cove, NSW 2066 (AU) (74) Representative: Wharton, Peter Robert, et al  Urquhart-Dykes & Lord Inventions House Valley Court, Canal Road Bradford BD1 4SP Bradford BD1 4SP (GB)