Global Patent Index - EP 0812929 B1

EP 0812929 B1 2000-01-05 - Process of nitriding and/or carbonitriding metallic workpieces

Title (en)

Process of nitriding and/or carbonitriding metallic workpieces

Title (de)

Verfahren zum Nitrieren und/oder Nitrocarburieren metallischer Werkstücke

Title (fr)

Procédé pour la nitruration et/ou carbonitruration de pièces métalliques

Publication

EP 0812929 B1 (DE)

Application

EP 96109451 A

Priority

EP 96109451 A

Abstract (en)

[origin: EP0812929A1] A process for gas nitriding or carbonitriding of an alloy steel workpiece (especially of corrosion resistant steel containing more than 13% Cr), in an ammonia-containing atmosphere, the workpiece is subjected to pre-carburising by supplying a dissociable carbon source, especially an alcohol, into the heated furnace prior to nitriding or carbonitriding.

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

C23C 8/34; C23C 8/02

IPC 8 full level (invention and additional information)

C23C 8/02 (2006.01); C23C 8/34 (2006.01)

CPC (invention and additional information)

C23C 8/02 (2013.01); C23C 8/34 (2013.01)

Designated contracting state (EPC)

AT CH DE ES FR GB IT LI

EPO simple patent family

EP 0812929 A1 19971217; EP 0812929 B1 20000105; AT 188513 T 20000115; DE 59604119 D1 20000210; ES 2142519 T3 20000416

INPADOC legal status


2008-04-30 [PG25 CH] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2008-02-15 [REG CH PL] PATENT CEASED

2007-10-15 [REG CH PFA] NAME/FIRM CHANGED

- Owner name: IPSEN INTERNATIONAL GMBH

- Free text: IPSEN INTERNATIONAL GMBH#FLUTSTRASSE 78#47533 KLEVE (DE) -TRANSFER TO- IPSEN INTERNATIONAL GMBH#FLUTSTRASSE 78#47533 KLEVE (DE)

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2005-09-16 [REG ES FD2A] ANNOUNCEMENT OF LAPSE IN SPAIN

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2005-04-08 [REG FR ST] NOTIFICATION OF LAPSE

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2005-02-02 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

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2004-06-14 [PG25 ES] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2004-06-13 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2000-12-20 [26N] NO OPPOSITION FILED

2000-04-28 [ET] FR: TRANSLATION FILED

2000-04-16 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2142519 T3

2000-03-22 [ITF] IT: TRANSLATION FOR A EP PATENT FILED

- Owner name: ING. ZINI MARANESI & C. S.R.L.

2000-02-10 [REF] CORRESPONDS TO:

- Document: DE 59604119 20000210

2000-02-02 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20000106

2000-01-14 [REG CH EP] ENTRY IN THE NATIONAL PHASE

2000-01-14 [REG CH NV] NEW AGENT

- Representative's name: E. BLUM & CO. PATENTANWAELTE

2000-01-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): AT CH DE ES FR GB IT LI

2000-01-05 [REF] CORRESPONDS TO:

- Document: AT 188513 T 20000115

1999-06-16 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19990430

1998-07-29 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980528

1997-12-17 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT CH DE ES FR GB IT LI