(19)
(11) EP 1 042 521 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
22.09.2004 Bulletin 2004/39

(45) Mention of the grant of the patent:
21.04.2004 Bulletin 2004/17

(21) Application number: 98965987.5

(22) Date of filing: 10.12.1998
(51) International Patent Classification (IPC)7: C22C 21/16, C22F 1/057
(86) International application number:
PCT/US1998/026301
(87) International publication number:
WO 1999/031287 (24.06.1999 Gazette 1999/25)

(54)

ALUMINUM ALLOY WITH A HIGH TOUGHNESS FOR USE AS PLATE IN AEROSPACE APPLICATIONS

ALUMINIUM LEGIERUNG MIT HOHER ZÄHIGKEIT FÜR DIE VERWENDUNG IN DER LUFTFAHRT

ALLIAGE D'ALUMINIUM A TENACITE ELEVEE DESTINE A ETRE UTILISE COMME PLAQUE DANS DES APPLICATIONS AEROSPATIALES

(84) Designated Contracting States:
BE CH DE ES FR GB IT LI

(30) Priority: 12.12.1997 US 69591 P

(43) Date of publication of application:
11.10.2000 Bulletin 2000/41

(73) Proprietor: Aluminum Company of America
Pittsburgh, PA 15212-5858 (US)

(72) Inventors:
  • LIU, John
    Alcoa Center, PA 15069 (US)
  • CHAKRABARTI, Dhruba, J.
    Alcoa Center, PA 15069 (US)
  • WESTERLUND, Robert, W.
    Davenport, IA 52808 (US)
  • BRAY, Gary, H.
    Alcoa Center, PA 15069 (US)
  • THOM, Terrence, N.
    Davenport, IA 52808 (US)

(74) Representative: Ebner von Eschenbach, Jennifer et al
Ladas & Parry, Dachauerstrasse 37
80335 München
80335 München (DE)


(56) References cited: : 
EP-A- 0 473 122
WO-A-96/29440
US-A- 5 213 639
 EP-A- 0 489 408
US-A- 4 294 625
   
       
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).