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Expired European patentEurope

Optical waveguide amplifier source gyroscope

EP 0470710 B1 · Applicant: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY

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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 July 16, 1991 and granted January 17, 1996. A European patent lasts at most 20 years from filing, so its term ended July 16, 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 January 16, 2017.
  • 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.
FiledJuly 16, 1991
PublishedFebruary 12, 1992
GrantedJanuary 17, 1996
Term endedJuly 16, 2011
Application numberEP 91306413
Classification (CPC)G01B9/0209 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJuly 16, 1991PublishedFeb 12, 1992Patent grantedJan 17, 1996Term endedJuly 16, 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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