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Expired European patentEurope

Quadrature signal generation system

EP 1091483 B1 · Applicant: Nippon Telegraph and Telephone Corporation

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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 July 25, 2000 and granted April 23, 2003. A European patent lasts at most 20 years from filing, so its term ended July 25, 2020.
  • 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 25, 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.
FiledJuly 25, 2000
PublishedApril 11, 2001
GrantedApril 23, 2003
Term endedJuly 25, 2020
Application numberEP 00410081
Classification (CPC)H03B27/00 +1 more

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedJuly 25, 2000PublishedApril 11, 2001Patent grantedApril 23, 2003Term endedJuly 25, 2020

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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