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Expired European patentEurope

Liquid crystal device

EP 0347913 B1 · Applicant: CANON KABUSHIKI KAISHA

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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 June 22, 1989 and granted September 3, 1997. A European patent lasts at most 20 years from filing, so its term ended June 22, 2009.
  • 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 22, 2014.
  • 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 22, 1989
PublishedDecember 27, 1989
GrantedSeptember 3, 1997
Term endedJune 22, 2009
Application numberEP 89111390
Classification (CPC)G02F1/13392

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedJune 22, 1989PublishedDec 27, 1989Patent grantedSep 3, 1997Term endedJune 22, 2009

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.