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Expired European patentEurope

Optical receiver and optical reception method compatible with differential quadrature phase shift keying

EP 1835640 B1 · Applicant: FUJITSU LIMITED

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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 April 29, 2005 and granted August 19, 2009. A European patent lasts at most 20 years from filing, so its term ended April 29, 2025.
  • 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.
FiledApril 29, 2005
PublishedSeptember 19, 2007
GrantedAugust 19, 2009
Term endedApril 29, 2025
Application numberEP 07012842
Classification (CPC)H04B10/61 +1 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedApril 29, 2005PublishedSep 19, 2007Patent grantedAug 19, 2009Term endedApril 29, 2025

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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