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Expired European patentEurope

Razor blade steel having high corrosion resistance, razor blades and a process for manufacturing razor blades

EP 0485641 B1 · Applicant: HITACHI METALS, LTD.

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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 November 10, 1990 and granted July 27, 1994. A European patent lasts at most 20 years from filing, so its term ended November 10, 2010.
  • 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 May 10, 2016.
  • 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.
FiledNovember 10, 1990
PublishedMay 20, 1992
GrantedJuly 27, 1994
Term endedNovember 10, 2010
Application numberEP 90121538
Classification (CPC)C21D6/04 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedNov 10, 1990PublishedMay 20, 1992Patent grantedJuly 27, 1994Term endedNov 10, 2010

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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