(19)
(11) EP 1 297 910 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:
01.10.2008 Bulletin 2008/40

(45) Mention of the grant of the patent:
02.04.2008 Bulletin 2008/14

(21) Application number: 01938574.9

(22) Date of filing: 08.06.2001
(51) International Patent Classification (IPC): 
B21C 37/08(2006.01)
(86) International application number:
PCT/JP2001/004877
(87) International publication number:
WO 2001/094043 (13.12.2001 Gazette 2001/50)

(54)

METHOD OF PRODUCING A HIGH-STRENGTH STEEL PIPE

VERFAHREN ZUM HERSTELLEN EINES HOCHFESTEN STAHLROHRES

PROCEDE DE FABRICATION D'UN TUBE D'ACIER HAUTE RESISTANCE

(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 09.06.2000 JP 2000174146
30.05.2001 JP 2001163327
30.05.2001 JP 2001163306

(43) Date of publication of application:
02.04.2003 Bulletin 2003/14

(73) Proprietor: Nippon Steel Corporation
Chiyoda-ku Tokyo 100-8071 (JP)

(72) Inventors:
  • TSURU, Eiji; C/O NIPPON STEEL CORP. Tech. Delvpt.
    Futtsu-shi Chiba 293-8511 (JP)
  • HARA, Takuya; C/O NIPPON STEEL CORP. Tech. Develp.
    Futtsu-shi Chiba 293-8511 (JP)
  • ASAHI, Hitoshi C/O NIPPON STEEL CORP. Tech. Delvp.
    Futtsu-shi Chiba 293-8511 (JP)
  • MIYAZAKI, Hideki NIPPON STEEL CORP. KIMITSU WORKS
    Kimitsu-shi Chiba 299-1141 (JP)
  • YOSHIDA, Tatsuya
    1, Kimitsu Kimitsu-shi Chiba 299-1141 (JP)

(74) Representative: Vossius & Partner 
Siebertstrasse 4
81675 München
81675 München (DE)


(56) References cited: : 
EP-A- 0 864 663
JP-A- 9 010 850
 EP-A- 0 867 520
JP-A- 59 199 117
   
       
    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).