(19)
(11) EP 3 294 918 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:
27.02.2019 Bulletin 2019/09

(45) Mention of the grant of the patent:
28.11.2018 Bulletin 2018/48

(21) Application number: 16831924.2

(22) Date of filing: 30.11.2016
(51) International Patent Classification (IPC): 
C22F 1/053(2006.01)
 C22C 21/10(2006.01)
(86) International application number:
PCT/IN2016/000280
(87) International publication number:
WO 2018/025275 (08.02.2018 Gazette 2018/06)

(54)

FOUR-STEP THERMAL AGING METHOD FOR IMPROVING ENVIRONMENTALLY ASSISTED CRACKING RESISTANCE OF 7XXX SERIES ALUMINIUM ALLOYS

VIERSTUFIGES THERMISCHES ALTERUNGSVERFAHREN ZUR VERBESSERUNG DER UMWELTUNTERSTÜTZTEN RISSBESTÄNDIGKEIT VON ALUMINIUMLEGIERUNGEN DER 7XXX-SERIE

PROCÉDÉ DE VIEILLISSEMENT THERMIQUE À QUATRE ÉTAPES POUR L'AMÉLIORATION DE LA RÉSISTANCE À LA FISSURATION INFLUENCÉE PAR L'ENVIRONNEMENT D'ALLIAGES D'ALUMINIUM DE SÉRIE 7XXX

(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 04.08.2016 IN 201621026704

(43) Date of publication of application:
21.03.2018 Bulletin 2018/12

(73) Proprietors:
  • Indian Institute of Technology, Bombay
    Mumbai 400076, Maharashtra (IN)
  • Godrej & Boyce Mfg. Co. Ltd.
    Mumbai 400079, Maharashtra (IN)

(72) Inventor:
  • The designation of the inventor has not yet been filed
     ()

(74) Representative: Lins, Martina 
Gramm, Lins & Partner Patent- und Rechtsanwälte PartGmbB Theodor-Heuss-Strasse 1
38122 Braunschweig
38122 Braunschweig (DE)


(56) References cited: : 
CN-A- 104 962 847
JP-A- 2009 013 479
US-A- 6 048 415
 JP-A- 2003 213 387
US-A- 4 431 467
US-B2- 8 524 014
   
  • KRISHNAN M AJAY ET AL: "Development of high strength AA 7010 aluminum alloy resistant to environmentally assisted cracking", CORROSION SCIENCE, OXFORD, GB, vol. 109, 25 March 2016 (2016-03-25), pages 94-100, XP029533044, ISSN: 0010-938X, DOI: 10.1016/J.CORSCI.2016.03.025
   
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).