(19)

(11)

EP 1 794 338 A2

(12)

(43) Date of publication: 13.06.2007 Bulletin 2007/24 (21) Application number: 05791238.8 (22) Date of filing: 25.08.2005

(51) International Patent Classification (IPC):  C22F 1/04(2006.01) (86) International application number: PCT/US2005/030194 (87) International publication number: WO 2006/026330 (09.03.2006 Gazette 2006/10)

(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 Designated Extension States: AL BA HR MK YU (30) Priority: 27.08.2004 US 926704 (71) Applicant: Commonwealth Industries, Inc. Louisville, KY 40202 (US)	(72) Inventors: LI, Zhong Lexington, KY 40513 (US) PLATEK, Paul Massillon, OH 44646 (US) (74) Representative: Ebner von Eschenbach, Jennifer et al LADAS & PARRY LLP Dachauerstrasse 37 80335 München 80335 München (DE)