(19)

(11)

EP 1 330 555 A1

(12)

(43) Date of publication: 30.07.2003 Bulletin 2003/31 (21) Application number: 01973802.0 (22) Date of filing: 14.09.2001

(51) International Patent Classification (IPC)7: C22B 3/26, C22B 3/32, C22B 3/38, C22B 23/00 (86) International application number: PCT/AU0101/161 (87) International publication number: WO 0202/2896 (21.03.2002 Gazette 2002/12)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 15.09.2000 AU PR016900 30.10.2000 AU PR111900 (71) Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Campbell,ACT 2612 (AU)	(72) Inventors: CHENG, Chu, Yong South Lake, Western Australia 6164 (AU) HOUCHIN, Martin Applecross, Western Australia 6153 (AU) (74) Representative: Breese, Pierre  3, avenue de l'Opéra 75001 Paris 75001 Paris (FR)