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(11)

EP 1 597 415 A1

(12)

(43) Date of publication: 23.11.2005 Bulletin 2005/47 (21) Application number: 04710771.9 (22) Date of filing: 13.02.2004

(51) International Patent Classification (IPC)7: C25B 11/04, C25B 1/13, C25B 9/00 (86) International application number: PCT/CN2004/000120 (87) International publication number: WO 2004/072329 (26.08.2004 Gazette 2004/35)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 14.02.2003 US 447948 P (71) Applicant: Versitech Ltd. Hong Kong (CN)	(72) Inventors: CHENG, Shaoan Hangzhou 310027 (CN) CHAN, Kwongyu 23 Sha Wan DriveHong Kong (CN) FUNG, Waikit Hong Kong (CN) (74) Representative: Wetke, Ellen et al Zacco Denmark A/S Hans Bekkevolds Allé 7 2900 Hellerup 2900 Hellerup (DK)