(19)

(11)

EP 0 489 047 A1

(12)

(43) Date of publication: 10.06.1992 Bulletin 1992/24 (21) Application number: 90912221.0 (22) Date of filing: 17.08.1990

(51) International Patent Classification (IPC):  B67D 7/ 02( . ) (86) International application number: PCT/AU1990/000352 (87) International publication number: WO 1991/002684 (07.03.1991 Gazette 1991/06)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 23.08.1989 AU 19890005941 07.03.1990 AU 19900008963 (71) Applicant: GIBSON CHEMICALS LIMITED Cheltenham, VIC 3192 (AU)	(72) Inventor: VANDERTOP, Michael, Julian Armadale, VIC 3143 (AU) (74) Representative: Hallybone, Huw George  CARPMAELS AND RANSFORD 43 Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)