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Expired European patentEurope

Fiber-optic gyroscope

EP 0577897 B1 · Applicant: SUMITOMO ELECTRIC INDUSTRIES, LIMITED

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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 29, 1992 and granted November 20, 1996. A European patent lasts at most 20 years from filing, so its term ended December 29, 2012.
  • 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 29, 2018.
  • 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 29, 1992
PublishedJanuary 12, 1994
GrantedNovember 20, 1996
Term endedDecember 29, 2012
Application numberEP 92311845
Classification (CPC)G01C19/721

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedDec 29, 1992PublishedJan 12, 1994Patent grantedNov 20, 1996Term endedDec 29, 2012

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.