(19)
(11) EP 1 255 909 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:
08.06.2005 Bulletin 2005/23

(45) Mention of the grant of the patent:
06.04.2005 Bulletin 2005/14

(21) Application number: 01905163.0

(22) Date of filing: 26.01.2001
(51) International Patent Classification (IPC)7: E21B 10/58, E21B 10/62, B23B 51/02, B23B 31/00, B23Q 11/00, E21B 10/54, E21B 10/60
(86) International application number:
PCT/US2001/002789
(87) International publication number:
WO 2001/061142 (23.08.2001 Gazette 2001/34)

(54)

DRILL BIT, HARD MEMBER, AND BIT BODY

BOHRMEISSEL, HARTWERKSTOFF UND MEISSELKÖRPER

TREPAN, ELEMENT DUR, ET CORPS DE TREPAN

(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

(30) Priority: 15.02.2000 US 500813
09.06.2000 US 591644

(43) Date of publication of application:
13.11.2002 Bulletin 2002/46

(73) Proprietor: KENNAMETAL INC.
Latrobe, PA 15650-0231 (US)

(72) Inventors:
  • DUNN, Curnie, A.
    Bristol, TN 24201 (US)
  • HAGA, Phillip, W.
    Chilhowie, VA 24319 (US)
  • MASSA, Ted, R.
    Latrobe, PA 15650 (US)
  • BISE, Douglas, E.
    Chilhowie, VA 24319 (US)
  • CONDON, Gary, J.
    Irwin, PA 15642 (US)
  • BELSHEIM, Stephen, T.
    Kingston Springs, TN 37082 (US)
  • RUTHERFORD, James, E.
    Big Stone Gap, VA 24219 (US)

(74) Representative: Sties, Jochen, Dipl.-Ing. 
Prinz & Partner Patentanwälte Manzingerweg 7
81241 München
81241 München (DE)


(56) References cited: : 
EP-A- 0 941 794
FR-A- 2 779 366
US-A- 2 802 642
US-A- 3 595 327
US-A- 5 551 811
 DE-A- 3 025 890
GB-A- 2 123 523
US-A- 3 592 276
US-A- 4 143 920
   
       
    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).