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Expired European patentEurope

Glass based optical disk and manufacturing process

EP 0494479 B1 · Applicant: DEL MAR AVIONICS

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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 7, 1991 and granted December 20, 1995. A European patent lasts at most 20 years from filing, so its term ended January 7, 2011.
  • 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 7, 2016.
  • 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 7, 1991
PublishedJuly 15, 1992
GrantedDecember 20, 1995
Term endedJanuary 7, 2011
Application numberEP 91300096
Classification (CPC)C03B19/14 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJan 7, 1991PublishedJuly 15, 1992Patent grantedDec 20, 1995Term endedJan 7, 2011

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.