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Expired European patentEurope

Process for manufacturing martensitic stainless steel excellent in stress corrosion cracking resistance

EP 0286675 B1 · Applicant: THE JAPAN STEEL WORKS, LTD.

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Overview

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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 October 24, 1986 and granted May 12, 1993. A European patent lasts at most 20 years from filing, so its term ended October 24, 2006.
  • 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 April 24, 2012.
  • 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.
FiledOctober 24, 1986
PublishedOctober 19, 1988
GrantedMay 12, 1993
Term endedOctober 24, 2006
Application numberEP 86906440
Classification (CPC)C21D6/004 +1 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedOct 24, 1986PublishedOct 19, 1988Patent grantedMay 12, 1993Term endedOct 24, 2006

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

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