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Expired European patentEurope

Arrangement for communication between equipment belonging to different network architectures

EP 0200721 B1 · Applicant: TELEVERKET

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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 23, 1984 and granted August 24, 1988. A European patent lasts at most 20 years from filing, so its term ended October 23, 2004.
  • 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 23, 2010.
  • 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 23, 1984
PublishedNovember 12, 1986
GrantedAugust 24, 1988
Term endedOctober 23, 2004
Application numberEP 84904187
Classification (CPC)H04L69/00 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedOct 23, 1984PublishedNov 12, 1986Patent grantedAug 24, 1988Term endedOct 23, 2004

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.