(19)

(11)

EP 2 077 949 A2

(12)

(88) Date of publication A3: 13.11.2008 (43) Date of publication: 15.07.2009 Bulletin 2009/29 (21) Application number: 07759824.1 (22) Date of filing: 30.03.2007

(51) International Patent Classification (IPC):  B41N 1/08(2006.01) C22C 21/00(2006.01) C22F 1/04(2006.01) B41N 3/03(2006.01) C22C 21/08(2006.01) C22F 1/047(2006.01) (86) International application number: PCT/US2007/065635 (87) International publication number: WO 2007/115167 (11.10.2007 Gazette 2007/41)

(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 (30) Priority: 31.03.2006 US 787826 P (71) Applicant: Alcoa Inc. Pittsburgh, PA 15212-5858 (US)	(72) Inventors: DEL RIO MARTIN, Juan Francisco E-03013 Alicante (ES) FUSTER, Jose Alberola E-03550 Alicante (ES) AZUAR, gemma, Mora 03005 Alicante (ES) (74) Representative: Stute, Ivo Peter  Bahnstrasse 9 40212 Düsseldorf 40212 Düsseldorf (DE)