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Expired European patentEurope

Lens grinding method and apparatus

EP 0236182 B1 · Applicant: Kabushiki Kaisha TOPCON

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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 January 29, 1987 and granted November 27, 1991. A European patent lasts at most 20 years from filing, so its term ended January 29, 2007.
  • 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 July 29, 2012.
  • 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.
FiledJanuary 29, 1987
PublishedSeptember 9, 1987
GrantedNovember 27, 1991
Term endedJanuary 29, 2007
Application numberEP 87400199
Classification (CPC)G05B19/4207

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedJan 29, 1987PublishedSep 9, 1987Patent grantedNov 27, 1991Term endedJan 29, 2007

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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