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Expired European patentEurope

Frequency multiplier without spurious oscillation

EP 1154563 B1 · Applicant: Fujitsu Quantum Devices Limited

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Overview

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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 February 23, 2001 and granted February 4, 2004. A European patent lasts at most 20 years from filing, so its term ended February 23, 2021.
  • 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 August 23, 2026.
  • 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.
FiledFebruary 23, 2001
PublishedNovember 14, 2001
GrantedFebruary 4, 2004
Term endedFebruary 23, 2021
Application numberEP 01301668
Classification (CPC)H03B19/00

Timeline

Timeline From EPO dates

2002200420062008201020122014201620182020Application filedFeb 23, 2001PublishedNov 14, 2001Patent grantedFeb 4, 2004Term endedFeb 23, 2021

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.