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Expired European patentEurope

Electro-optical interference modulator with high sensitivity

EP 0150752 B1 · Applicant: COMPAGNIE GENERALE D'ELECTRICITE Société anonyme dite:

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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 January 15, 1985 and granted March 15, 1989. A European patent lasts at most 20 years from filing, so its term ended January 15, 2005.
  • 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 July 15, 2010.
  • 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.
FiledJanuary 15, 1985
PublishedAugust 7, 1985
GrantedMarch 15, 1989
Term endedJanuary 15, 2005
Application numberEP 85100325
Classification (CPC)G02F1/225

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedJan 15, 1985PublishedAug 7, 1985Patent grantedMarch 15, 1989Term endedJan 15, 2005

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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