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Expired European patentEurope

Distributed architecture for services in a telephony system

EP 0885530 B1 · Applicant: International Business Machines Corporation

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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 February 21, 1996 and granted September 12, 2001. A European patent lasts at most 20 years from filing, so its term ended February 21, 2016.
  • 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 August 21, 2021.
  • 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.
FiledFebruary 21, 1996
PublishedDecember 23, 1998
GrantedSeptember 12, 2001
Term endedFebruary 21, 2016
Application numberEP 96901478
Classification (CPC)H04L65/80 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedFeb 21, 1996PublishedDec 23, 1998Patent grantedSep 12, 2001Term endedFeb 21, 2016

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.