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Expired European patentEurope

Non-linear optical device

EP 0526486 B1 · Applicant: SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOV. OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND

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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 April 19, 1991 and granted July 31, 1996. A European patent lasts at most 20 years from filing, so its term ended April 19, 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 October 19, 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.
FiledApril 19, 1991
PublishedFebruary 10, 1993
GrantedJuly 31, 1996
Term endedApril 19, 2011
Application numberEP 91907720
Classification (CPC)G02F1/3611 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedApril 19, 1991PublishedFeb 10, 1993Patent grantedJuly 31, 1996Term endedApril 19, 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

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