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Expired European patentEurope

Channel estimation feedback in an orthogonal frequency division multiplexing system or the like

EP 1665705 B1 · Applicant: Intel Corporation

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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 15, 2004 and granted March 14, 2012. A European patent lasts at most 20 years from filing, so its term ended September 15, 2024.
  • 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.
FiledSeptember 15, 2004
PublishedJune 7, 2006
GrantedMarch 14, 2012
Term endedSeptember 15, 2024
Application numberEP 04784291
Classification (CPC)H04B7/0636 +2 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedSep 15, 2004PublishedJune 7, 2006Patent grantedMarch 14, 2012Term endedSep 15, 2024

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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