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Expired European patentEurope

All-optical switch

EP 0718669 B1 · Applicant: NEC CORPORATION

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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 12, 1995 and granted July 23, 2003. A European patent lasts at most 20 years from filing, so its term ended December 12, 2015.
  • 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 12, 2021.
  • 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 12, 1995
PublishedJune 26, 1996
GrantedJuly 23, 2003
Term endedDecember 12, 2015
Application numberEP 95119591
Classification (CPC)G02F1/21 +1 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedDec 12, 1995PublishedJune 26, 1996Patent grantedJuly 23, 2003Term endedDec 12, 2015

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.