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Expired European patentEurope

Device for lighting passive liquid crystal displays

EP 0139655 B1 · Applicant: ROBERT BOSCH GMBH

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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 December 24, 1983 and granted April 15, 1987. A European patent lasts at most 20 years from filing, so its term ended December 24, 2003.
  • 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 June 24, 2009.
  • 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.
FiledDecember 24, 1983
PublishedMay 8, 1985
GrantedApril 15, 1987
Term endedDecember 24, 2003
Application numberEP 84900273
Classification (CPC)G01D11/28 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedDec 24, 1983PublishedMay 8, 1985Patent grantedApril 15, 1987Term endedDec 24, 2003

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.