(19)

(11)

EP 0 459 986 A1

(12)

(43) Date of publication: 11.12.1991 Bulletin 1991/50 (21) Application number: 90901511.0 (22) Date of filing: 05.01.1990

(51) International Patent Classification (IPC):  C09B 67/ 02( . ) C09K 11/ 02( . ) C09B 67/ 24( . ) (86) International application number: PCT/AU1990/000005 (87) International publication number: WO 1990/010044 (07.09.1990 Gazette 1990/21)

(84) Designated Contracting States: AT BE DE DK FR GB IT NL SE (30) Priority: 23.02.1989 AU 19890002905 (71) Applicant: THE COMMONWEALTH OF AUSTRALIA care of THE SECRETARY DEPARTMENT OF DEFENCE Canberra, ACT 2600 (AU)	(72) Inventor: SWINTON, Robert, James Ascot Vale, VIC 3032 (AU) (74) Representative: Pendlebury, Anthony, et al  PAGE, WHITE & FARRER 54 Doughty Street London WC1N 2LS London WC1N 2LS (GB)