(19)

(11)

EP 0 658 214 A1

(12)

(43) Date of publication: 21.06.1995 Bulletin 1995/25 (21) Application number: 93917451.0 (22) Date of filing: 12.08.1993

(51) International Patent Classification (IPC):  C22B 1/ 02( . ) C22B 3/ 10( . ) C22B 1/ 243( . ) C22B 34/ 12( . ) (86) International application number: PCT/AU1993/000414 (87) International publication number: WO 1994/004709 (03.03.1994 Gazette 1994/06)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC (30) Priority: 14.08.1992 AU 1992PL04105 10.02.1993 AU 1993PL07193 (71) Applicant: TECHNOLOGICAL RESOURCES PTY. LTD. Melbourne, VIC 3001 (AU)	(72) Inventors: HOLLITT, Michael, John Box Hill North, VIC 3129 (AU) McCLELLAND, Ross, Alexander Maryknoll, VIC 3812 (AU) TUFFLEY, John, Roger Burnside, S.A. 5066 (AU) (74) Representative: West, Alan Harry, et al  R.G.C. Jenkins & Co. 26 Caxton Street London SW1H 0RJ London SW1H 0RJ (GB)