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EP 0023945 B1 · Applicant: Rollei Fototechnic GmbH

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 22, 1980 and granted May 18, 1983. A European patent lasts at most 20 years from filing, so its term ended April 22, 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 22, 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 22, 1980
PublishedFebruary 18, 1981
GrantedMay 18, 1983
Term endedApril 22, 2000
Application numberEP 80102146
Classification (CPC)G03B23/18

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedApril 22, 1980PublishedFeb 18, 1981Patent grantedMay 18, 1983Term endedApril 22, 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.