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Expired European patentEurope

Method for the establishment of an inverted pilot sequence for a de-interleaving used in a digital transmission

EP 0370442 B1 · Applicant: ALCATEL N.V.

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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 November 20, 1989 and granted April 13, 1994. A European patent lasts at most 20 years from filing, so its term ended November 20, 2009.
  • 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 May 20, 2015.
  • 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.
FiledNovember 20, 1989
PublishedMay 30, 1990
GrantedApril 13, 1994
Term endedNovember 20, 2009
Application numberEP 89121467
Classification (CPC)H03M13/27

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedNov 20, 1989PublishedMay 30, 1990Patent grantedApril 13, 1994Term endedNov 20, 2009

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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