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Expired European patentEurope

Friction material using steel fibers

EP 0183121 B1 · Applicant: SUMITOMO ELECTRIC INDUSTRIES 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 November 11, 1985 and granted April 11, 1990. A European patent lasts at most 20 years from filing, so its term ended November 11, 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 May 11, 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.
FiledNovember 11, 1985
PublishedJune 4, 1986
GrantedApril 11, 1990
Term endedNovember 11, 2005
Application numberEP 85114331
Classification (CPC)F16D69/026

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedNov 11, 1985PublishedJune 4, 1986Patent grantedApril 11, 1990Term endedNov 11, 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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