Patent Yard Sign in
Expired European patentEurope

Bipolar voltage controlled optical switch using intersecting waveguide

EP 0105693 B1 · Applicant: FUJITSU LIMITED

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed September 27, 1983 and granted May 23, 1990. A European patent lasts at most 20 years from filing, so its term ended September 27, 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 27, 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 27, 1983
PublishedApril 18, 1984
GrantedMay 23, 1990
Term endedSeptember 27, 2003
Application numberEP 83305761
Classification (CPC)G02F1/3137

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedSep 27, 1983PublishedApril 18, 1984Patent grantedMay 23, 1990Term endedSep 27, 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.