(19)

(11)

EP 0 264 398 A1

(12)

(43) Date of publication: 27.04.1988 Bulletin 1988/17 (21) Application number: 87902348.0 (22) Date of filing: 28.04.1987

(51) International Patent Classification (IPC):  C14C 1/ 08( . ) C14C 13/ 00( . ) C14C 3/ 02( . ) (86) International application number: PCT/AU1987/000117 (87) International publication number: WO 1987/006622 (05.11.1987 Gazette 1987/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 28.04.1986 AU 19860005631 (71) Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Parkville, VIC 3052 (AU)	(72) Inventors: GORDON, Peter, Graham Gisborne, VIC 3437 (AU) ADMINIS, Udo South Caulfield, VIC 3162 (AU) (74) Representative: Gordon, Michael Vincent  GILL JENNINGS & EVERY, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)