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Expired European patentEurope

Application of light source including light guide for emanating linearly polarized light to liquid crystal display

EP 1031872 B1 · Applicant: TEIJIN LIMITED

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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 September 16, 1999 and granted January 14, 2009. A European patent lasts at most 20 years from filing, so its term ended September 16, 2019.
  • 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 March 16, 2025.
  • 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.
FiledSeptember 16, 1999
PublishedAugust 30, 2000
GrantedJanuary 14, 2009
Term endedSeptember 16, 2019
Application numberEP 99943363
Classification (CPC)G02F1/13362

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedSep 16, 1999PublishedAug 30, 2000Patent grantedJan 14, 2009Term endedSep 16, 2019

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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