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EP 2 152 923 A1

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(43) Date of publication: 17.02.2010 Bulletin 2010/07 (21) Application number: 08757187.3 (22) Date of filing: 29.05.2008

(51) International Patent Classification (IPC):  C22C 21/00(2006.01) B22D 21/04(2006.01) C22F 1/05(2006.01) B22D 17/22(2006.01) C22C 21/08(2006.01) (86) International application number: PCT/CA2008/001051 (87) International publication number: WO 2008/144935 (04.12.2008 Gazette 2008/49)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 31.05.2007 US 941207 P (71) Applicant: Alcan International Ltd. Montreal QC H3A 3G2 (CA)	(72) Inventors: LANGLAIS, Joseph Jonquiere, Quebec G7X 4G5 (CA) LEMIEUX, Alain Jonquière, Quebec G7X 8G8 (CA) ANDRADE, Neivi Jonquiere, Quebec G7S 3A2 (CA) (74) Representative: Delorme, Nicolas et al Cabinet Germain & Maureau BP 6153 69466 Lyon Cedex 06 69466 Lyon Cedex 06 (FR)