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Expired European patentEurope

System with variable front focal distance and focal length

EP 0085308 B1 · Applicant: Firma Carl Zeiss

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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 12, 1983 and granted December 4, 1985. A European patent lasts at most 20 years from filing, so its term ended January 12, 2003.
  • 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 12, 2008.
  • 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 12, 1983
PublishedAugust 10, 1983
GrantedDecember 4, 1985
Term endedJanuary 12, 2003
Application numberEP 83100185
Classification (CPC)G02B21/22

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJan 12, 1983PublishedAug 10, 1983Patent grantedDec 4, 1985Term endedJan 12, 2003

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.