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Expired European patentEurope

Method for setting up a group call in a cellular radio system

EP 0555441 B1 · Applicant: NOKIA TELECOMMUNICATIONS OY

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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 August 26, 1992 and granted March 5, 1997. A European patent lasts at most 20 years from filing, so its term ended August 26, 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 February 26, 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.
FiledAugust 26, 1992
PublishedAugust 18, 1993
GrantedMarch 5, 1997
Term endedAugust 26, 2012
Application numberEP 92918110
Classification (CPC)H04W68/08

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedAug 26, 1992PublishedAug 18, 1993Patent grantedMarch 5, 1997Term endedAug 26, 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

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