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Expired European patentEurope

Method and apparatus for producing optical displays

EP 0042377 B1 · Applicant: INTERNATIONAL REMOTE IMAGING SYSTEMS

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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 December 26, 1979 and granted November 5, 1986. A European patent lasts at most 20 years from filing, so its term ended December 26, 1999.
  • 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 June 26, 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.
FiledDecember 26, 1979
PublishedDecember 30, 1981
GrantedNovember 5, 1986
Term endedDecember 26, 1999
Application numberEP 80900452
Classification (CPC)G02B27/1066 +2 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedDec 26, 1979PublishedDec 30, 1981Patent grantedNov 5, 1986Term endedDec 26, 1999

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.