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Expired European patentEurope

Filtering method for transmit processing in orthogonal frequency division multiplex communication systems and related filtering apparatus

EP 1609282 B1 · Applicant: NTT DoCoMo, Inc.

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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 March 28, 2003 and granted May 13, 2009. A European patent lasts at most 20 years from filing, so its term ended March 28, 2023.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledMarch 28, 2003
PublishedDecember 28, 2005
GrantedMay 13, 2009
Term endedMarch 28, 2023
Application numberEP 03724938
Classification (CPC)H04L25/0242 +2 more

Timeline

Timeline From EPO dates

2004200620082010201220142016201820202022Application filedMarch 28, 2003PublishedDec 28, 2005Patent grantedMay 13, 2009Term endedMarch 28, 2023

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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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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