(19)

(11)

EP 0 438 560 A1

(12)

(43) Date of publication: 31.07.1991 Bulletin 1991/31 (21) Application number: 90911863.0 (22) Date of filing: 03.08.1990

(51) International Patent Classification (IPC):  C22C 38/ 36( . ) (86) International application number: PCT/AU1990/000331 (87) International publication number: WO 1991/002101 (21.02.1991 Gazette 1991/05)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 04.08.1989 AU 19890005628 (71) Applicant: WARMAN INTERNATIONAL LIMITED Artarmon, NSW 2064 (AU)	(72) Inventor: DOLMAN, Kevin, Francis Helena Valley, W.A. 6056 (AU) (74) Representative: Jennings, Nigel Robin, et al  KILBURN & STRODE 30 John Street London WC1N 2DD London WC1N 2DD (GB)