(19)

(11)

EP 1 861 523 A1

(12)

(43) Date of publication: 05.12.2007 Bulletin 2007/49 (21) Application number: 06705043.5 (22) Date of filing: 22.03.2006

(51) International Patent Classification (IPC):  C25C 3/06(2006.01) C25C 3/12(2006.01) C25C 3/10(2006.01) (86) International application number: PCT/AU2006/000383 (87) International publication number: WO 2006/099672 (28.09.2006 Gazette 2006/39)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 24.03.2005 AU 2005901488 (71) Applicant: BHP Billiton Innovation Pty Ltd Melbourne, Victoria 3000 (AU)	(72) Inventor: BAYER, Ingo 3900 Richards Bay (ZA) (74) Representative: Curtis, Philip Anthony et al A.A. Thornton & Co., 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)