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Expired European patentEurope

Liquid crystal device, display apparatus using same and display method using same

EP 0507204 B1 · Applicant: CANON KABUSHIKI KAISHA

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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 March 25, 1992 and granted November 20, 1996. A European patent lasts at most 20 years from filing, so its term ended March 25, 2012.
  • 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 September 25, 2017.
  • 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.
FiledMarch 25, 1992
PublishedOctober 7, 1992
GrantedNovember 20, 1996
Term endedMarch 25, 2012
Application numberEP 92105116
Classification (CPC)C09K19/544

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedMarch 25, 1992PublishedOct 7, 1992Patent grantedNov 20, 1996Term endedMarch 25, 2012

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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