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Expired European patentEurope

Passive optical network

EP 0553159 B1 · Applicant: BRITISH TELECOMMUNICATIONS public limited company

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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 October 17, 1991 and granted September 11, 1996. A European patent lasts at most 20 years from filing, so its term ended October 17, 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 April 17, 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.
FiledOctober 17, 1991
PublishedAugust 4, 1993
GrantedSeptember 11, 1996
Term endedOctober 17, 2011
Application numberEP 91917894
Classification (CPC)H04B10/272

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedOct 17, 1991PublishedAug 4, 1993Patent grantedSep 11, 1996Term endedOct 17, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.