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Expired European patentEurope

Electro-optic wave guide modulator

EP 0201684 B1 · Applicant: NIPPON HOSO KYOKAI

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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 March 12, 1986 and granted March 10, 1993. A European patent lasts at most 20 years from filing, so its term ended March 12, 2006.
  • 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 September 12, 2011.
  • 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.
FiledMarch 12, 1986
PublishedNovember 20, 1986
GrantedMarch 10, 1993
Term endedMarch 12, 2006
Application numberEP 86103304
Classification (CPC)G02F1/035

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMarch 12, 1986PublishedNov 20, 1986Patent grantedMarch 10, 1993Term endedMarch 12, 2006

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.