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Expired European patentEurope

Process for producing multi-layered alloys

EP 0090973 B1 · Applicant: KABUSHIKI KAISHA TOSHIBA

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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 April 21, 1980 and granted July 23, 1986. A European patent lasts at most 20 years from filing, so its term ended April 21, 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 October 21, 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.
FiledApril 21, 1980
PublishedOctober 12, 1983
GrantedJuly 23, 1986
Term endedApril 21, 2000
Application numberEP 83102606
Classification (CPC)B22D11/06 +2 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedApril 21, 1980PublishedOct 12, 1983Patent grantedJuly 23, 1986Term endedApril 21, 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.