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Expired European patentEurope

Downlink transmission power control scheme for mobile communication system using site diversity

EP 1662675 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 July 29, 1997 and granted October 22, 2008. A European patent lasts at most 20 years from filing, so its term ended July 29, 2017.
  • 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 January 29, 2023.
  • 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.
FiledJuly 29, 1997
PublishedMay 31, 2006
GrantedOctober 22, 2008
Term endedJuly 29, 2017
Application numberEP 06003927
Classification (CPC)H04W52/40

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedJuly 29, 1997PublishedMay 31, 2006Patent grantedOct 22, 2008Term endedJuly 29, 2017

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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