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Expired European patentEurope

A method of operating a multiple access communications system

EP 0321454 B1 · Applicant: Philips Electronics N.V.

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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 September 20, 1985 and granted January 27, 1993. A European patent lasts at most 20 years from filing, so its term ended September 20, 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 March 20, 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.
FiledSeptember 20, 1985
PublishedJune 21, 1989
GrantedJanuary 27, 1993
Term endedSeptember 20, 2005
Application numberEP 89200593
Classification (CPC)H04W84/08

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedSep 20, 1985PublishedJune 21, 1989Patent grantedJan 27, 1993Term endedSep 20, 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.