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Expired European patentEurope

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EP 0021494 B1 · Applicant: Eta A.G. Ebauches-Fabrik

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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.

Why it's free to use

  • Filed June 9, 1980 and granted November 28, 1984. A European patent lasts at most 20 years from filing, so its term ended June 9, 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 December 9, 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.
FiledJune 9, 1980
PublishedJanuary 7, 1981
GrantedNovember 28, 1984
Term endedJune 9, 2000
Application numberEP 80200529
Classification (CPC)G04C3/14

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedJune 9, 1980PublishedJan 7, 1981Patent grantedNov 28, 1984Term endedJune 9, 2000

Sources & verification