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Expired European patentEurope

Method of reducing the convergence time of an echo canceller

EP 0270706 B1 · Applicant: TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES T.R.T.

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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 June 9, 1983 and granted March 24, 1993. A European patent lasts at most 20 years from filing, so its term ended June 9, 2003.
  • 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 December 9, 2008.
  • 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.
FiledJune 9, 1983
PublishedJune 15, 1988
GrantedMarch 24, 1993
Term endedJune 9, 2003
Application numberEP 86202106
Classification (CPC)H04B3/238

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJune 9, 1983PublishedJune 15, 1988Patent grantedMarch 24, 1993Term endedJune 9, 2003

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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