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Expired European patentEurope

Discrete fourier transformation method and apparatus

EP 1038237 B1 · Applicant: Telefonaktiebolaget L M Ericsson (Publ)

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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 December 15, 1998 and granted May 15, 2002. A European patent lasts at most 20 years from filing, so its term ended December 15, 2018.
  • 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 June 15, 2024.
  • 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.
FiledDecember 15, 1998
PublishedSeptember 27, 2000
GrantedMay 15, 2002
Term endedDecember 15, 2018
Application numberEP 98963720
Classification (CPC)G06F17/142

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedDec 15, 1998PublishedSep 27, 2000Patent grantedMay 15, 2002Term endedDec 15, 2018

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

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