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Expired European patentEurope

Passive electrooptic display device

EP 0028294 B1 · Applicant: VDO Adolf Schindling AG

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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 August 14, 1980 and granted October 26, 1983. A European patent lasts at most 20 years from filing, so its term ended August 14, 2000.
  • 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 February 14, 2006.
  • 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.
FiledAugust 14, 1980
PublishedMay 13, 1981
GrantedOctober 26, 1983
Term endedAugust 14, 2000
Application numberEP 80104809
Classification (CPC)G02F1/133528 +2 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedAug 14, 1980PublishedMay 13, 1981Patent grantedOct 26, 1983Term endedAug 14, 2000

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.