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Expired European patentEurope

Liquid crystal display device

EP 0509727 B1 · Applicant: SHARP 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 April 10, 1992 and granted June 18, 1997. A European patent lasts at most 20 years from filing, so its term ended April 10, 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 October 10, 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.
FiledApril 10, 1992
PublishedOctober 21, 1992
GrantedJune 18, 1997
Term endedApril 10, 2012
Application numberEP 92303253
Classification (CPC)G09G3/3406 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedApril 10, 1992PublishedOct 21, 1992Patent grantedJune 18, 1997Term endedApril 10, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.