EP 0512254 A3 19930324 - PROCESS FOR UNIFORM THERMOCHEMICAL TREATMENT OF STEEL PIECES HAVING DIFFICULT ACCESSIBLE AREAS
Title (en)
PROCESS FOR UNIFORM THERMOCHEMICAL TREATMENT OF STEEL PIECES HAVING DIFFICULT ACCESSIBLE AREAS
Publication
Application
Priority
DE 4115135 A 19910508
Abstract (en)
[origin: EP0512254A2] For uniform thermochemical treatment of steel parts having areas with difficult access from the outside, reactive gases are used at temperatures above 450 DEG C and pressures above 0.2 MPa.
IPC 1-7
IPC 8 full level
C23C 8/20 (2006.01); C23C 8/22 (2006.01); C23C 8/26 (2006.01); F02M 61/16 (2006.01)
CPC (source: EP)
C23C 8/22 (2013.01); C23C 8/26 (2013.01); F02M 61/166 (2013.01)
Citation (search report)
- [X] JP S52145343 A 19771203 - OGAWA KIYOICHI
- [XE] EP 0485686 A1 19920520 - DEGUSSA [DE]
- [XD] US 2779697 A 19570129 - CHENAULT ROY L, et al
- [X] GB 749992 A 19560606 - UNITED STATES STEEL CORP
- [A] GB 1309257 A 19730307 - MILLINGFORD ENG CO LTD
- [AD] DE 2851983 A1 19800604 - DEGUSSA
- [X] PATENT ABSTRACTS OF JAPAN, unexamined applications, Field C, Band 5, Nr. 124, 11. August 1981 THE PATENT OFFICE JAPANESE GOVERNMENT Seite 6 C 66
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0512254 A2 19921111; EP 0512254 A3 19930324; EP 0512254 B1 19960619; EP 0512254 B2 20000119; AT E139579 T1 19960715; CS 137592 A3 19921216; CZ 288263 B6 20010516; DE 4115135 C1 19920227; DE 59206595 D1 19960725; ES 2088515 T3 19960816; ES 2088515 T5 20000501; HU 209457 B 19940628; HU 913870 D0 19920228; HU T61056 A 19921130; JP 3258071 B2 20020218; JP H05132753 A 19930528; PL 291528 A1 19921116; RU 2052535 C1 19960120; TW 223128 B 19940501
DOCDB simple family (application)
EP 92105758 A 19920403; AT 92105758 T 19920403; CS 137592 A 19920506; DE 4115135 A 19910508; DE 59206595 T 19920403; ES 92105758 T 19920403; HU 387091 A 19911209; JP 11353092 A 19920506; PL 29152891 A 19910826; SU 5011449 A 19920507; TW 80106842 A 19910828