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Current content: 157 117 910 patent documents

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139 301 new documents added

1 340 825 documents amended

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EP 0985739 B1 20030514 - Method of hardening piston crowns and piston crown

Title (en)

Method of hardening piston crowns and piston crown

Title (de)

Verfahren zum Härten von Kolbenkronen und Kolbenkrone

Title (fr)

Procédé pour le durcissement de têtes de piston et tête de piston

Publication

EP 0985739 B1 20030514 (DE)

Application

EP 98117125 A 19980910

Priority

EP 98117125 A 19980910

Abstract (en)

[origin: EP0985739A1] Process for hardening a partial region of the surface of steel semicrowns (2) is carried out by nitriding.

IPC 1-7

C23C 8/26; F02F 3/10

IPC 8 full level

C23C 8/26 (2006.01); F02B 3/06 (2006.01)

CPC (source: EP)

C23C 8/26 (2013.01); F02B 3/06 (2013.01); F02F 2007/0097 (2013.01); F05C 2201/0433 (2013.01); F05C 2201/0448 (2013.01)

Designated contracting state (EPC)

DE FI NL

DOCDB simple family (publication)

EP 0985739 A1 20000315; EP 0985739 B1 20030514; DE 59808370 D1 20030618

DOCDB simple family (application)

EP 98117125 A 19980910; DE 59808370 T 19980910