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European application, no grantEurope

Process for the heat treatment of steel and for controlling said treatment; steel obtained thereby

EP 0013654 A1 · Applicant: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed January 14, 1980 and never granted as a European patent. Had it been granted, its 20-year term would have ended January 14, 2000.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by July 14, 2005.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJanuary 14, 1980
PublishedJuly 23, 1980
GrantedNever granted
Term endedJanuary 14, 2000
Application numberEP 80400048
Classification (CPC)C23C8/22 +2 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedJan 14, 1980PublishedJuly 23, 1980Term endedJan 14, 2000

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.