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(11)

EP 2 209 925 A1

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(43) Date of publication: 28.07.2010 Bulletin 2010/30 (21) Application number: 07861961.6 (22) Date of filing: 14.11.2007

(51) International Patent Classification (IPC):  C21D 9/00(2006.01) H01M 4/58(2010.01) (86) International application number: PCT/US2007/023784 (87) International publication number: WO 2009/064265 (22.05.2009 Gazette 2009/21)

(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 MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (71) Applicants: Chang, Chun-Chieh Ithaca, NY 14850 (US) Chang, Tsun-Yu Taichung (TW)	(72) Inventors: Chang, Chun-Chieh Ithaca, NY 14850 (US) Chang, Tsun-Yu Taichung (TW) (74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät  Leopoldstrasse 4 80802 München 80802 München (DE)