Global patent index - EP 1076726 A1

EP 1076726 A1 2001-02-21 - METHOD FOR CARBURIZING OR CARBONITRIDING METAL PARTS

Title (en)

METHOD FOR CARBURIZING OR CARBONITRIDING METAL PARTS

Title (de)

VERFAHREN ZUM ZEMENTIEREN ODER CARBONITRIEREN VON METALLISCHEN GEGENSTÄNDEN

Title (fr)

PROCEDE DE CEMENTATION OU CARBONITRURATION DE PIECES METALLIQUES

Publication

EP 1076726 A1 (FR)

Application

EP 99910437 A

Priority

  • FR 9900707 W
  • FR 9805231 A

Abstract (en)

[origin: FR2777910A1] Carburizing or carbo-nitriding of metal or metal alloy components involves contacting the components, at least during a carbon enrichment phase, with an enriching atmosphere made up of hydrogen and carbon monoxide. The CO/H2 ratio of the atmosphere is different by 1/2.

IPC 1-7 (main, further and additional classification)

C21D 1/76; C23C 8/22; C23C 8/32

IPC 8 full level (invention and additional information)

C23C 8/22 (2006.01); C21D 1/06 (2006.01); C21D 1/76 (2006.01); C23C 8/20 (2006.01); C23C 8/30 (2006.01); C23C 8/32 (2006.01)

CPC (invention and additional information)

C23C 8/30 (2013.01); C23C 8/20 (2013.01)

Citation (search report)

See references of WO 9955921A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

FR 2777910 A1 19991029; FR 2777910 B1 20000825; AU 2939499 A 19991116; BR 9910018 A 20010109; CA 2324943 A1 19991104; CN 1298456 A 20010606; EP 1076726 A1 20010221; JP 2002513083 A 20020508; WO 9955921 A1 19991104

INPADOC legal status

2002-12-11 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20021014

2002-04-24 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: L'AIR LIQUIDE, S.A. A DIRECTOIRE ET CONSEIL DE SUR

- Ref Legal Event Code: RAP1

2001-06-27 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010509

2001-02-21 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001127

2001-02-21 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE