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Expired European patentEurope

Loop transmission system

EP 0168258 B1 · Applicant: FUJITSU LIMITED

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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 July 12, 1985 and granted April 3, 1991. A European patent lasts at most 20 years from filing, so its term ended July 12, 2005.
  • 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 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.
FiledJuly 12, 1985
PublishedJanuary 15, 1986
GrantedApril 3, 1991
Term endedJuly 12, 2005
Application numberEP 85304992
Classification (CPC)H04L12/437

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedJuly 12, 1985PublishedJan 15, 1986Patent grantedApril 3, 1991Term endedJuly 12, 2005

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.