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Expired European patentEurope

High strength stainless steel, and process for its production

EP 0241553 B1 · Applicant: AICHI STEEL WORKS, LIMITED

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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 15, 1985 and granted June 17, 1992. A European patent lasts at most 20 years from filing, so its term ended October 15, 2005.
  • 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 15, 2011.
  • 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 15, 1985
PublishedOctober 21, 1987
GrantedJune 17, 1992
Term endedOctober 15, 2005
Application numberEP 85905113
Classification (CPC)C22C38/001 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedOct 15, 1985PublishedOct 21, 1987Patent grantedJune 17, 1992Term endedOct 15, 2005

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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