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Expired European patentEurope

Color liquid crystal display device and method for driving same

EP 0338412 B1 · Applicant: ASAHI GLASS COMPANY LTD.

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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 April 13, 1989 and granted March 29, 1995. A European patent lasts at most 20 years from filing, so its term ended April 13, 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 October 13, 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.
FiledApril 13, 1989
PublishedOctober 25, 1989
GrantedMarch 29, 1995
Term endedApril 13, 2009
Application numberEP 89106561
Classification (CPC)G02F1/133512 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedApril 13, 1989PublishedOct 25, 1989Patent grantedMarch 29, 1995Term endedApril 13, 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

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