(19)
(11) EP 1 390 553 A1

(12)

(43) Date of publication:
25.02.2004 Bulletin 2004/09

(21) Application number: 02727087.5

(22) Date of filing: 02.05.2002
(51) International Patent Classification (IPC)7C22C 21/02, C22C 21/08, C22F 1/05
(86) International application number:
PCT/CA2002/000653
(87) International publication number:
WO 2002/090608 (14.11.2002 Gazette 2002/46)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 03.05.2001 US 288381 P

(71) Applicant: ALCAN INTERNATIONAL LIMITED
MontrealQuebec H3A 3G2 (CA)

(72) Inventors:
  • BULL, Michael, Jackson
    Brighton, MI 48116 (US)
  • GUPTA, Alok, Kumar
    Kingston, Ontario K7M 1E2 (CA)
  • LLOYD, David, James
    Bath, Ontario K0H 1G0 (CA)
  • MAROIS, Pierre, H.
    Kingston, Ontario K7M 4J5 (CA)
  • SORENSEN, John
    Gananoque, Ontario K7G 2V3 (CA)

(74) Representative: Gaunt, Robert John 
Stevens, Hewlett & PerkinsHalton House20/23 Holborn
London EC1N 2JD
London EC1N 2JD (GB)

   


(54) PROCESS FOR PREPARING AN ALUMINUM ALLOY SHEET WITH IMPROVED BENDABILITY AND ALUMINUM ALLOY SHEET PRODUCED THEREFROM