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Expired European patentEurope

Providing announcement information in requests to establish call sessions in a data network

EP 1275239 B1 · Applicant: Nortel Networks 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 April 3, 2001 and granted August 23, 2006. A European patent lasts at most 20 years from filing, so its term ended April 3, 2021.
  • 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 October 3, 2026.
  • 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.
FiledApril 3, 2001
PublishedJanuary 15, 2003
GrantedAugust 23, 2006
Term endedApril 3, 2021
Application numberEP 01924623
Classification (CPC)H04M7/006

Timeline

Timeline From EPO dates

2002200420062008201020122014201620182020Application filedApril 3, 2001PublishedJan 15, 2003Patent grantedAug 23, 2006Term endedApril 3, 2021

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.