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Expired European patentEurope

Method of making light guides

EP 0106752 B1 · Applicant: COMPAGNIE LYONNAISE DE TRANSMISSIONS OPTIQUES Société anonyme dite:

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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 September 30, 1983 and granted May 18, 1988. A European patent lasts at most 20 years from filing, so its term ended September 30, 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 March 30, 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.
FiledSeptember 30, 1983
PublishedApril 25, 1984
GrantedMay 18, 1988
Term endedSeptember 30, 2003
Application numberEP 83401927
Classification (CPC)C03C17/02 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedSep 30, 1983PublishedApril 25, 1984Patent grantedMay 18, 1988Term endedSep 30, 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.