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Expired European patentEurope

Linearising circuit and method, particularly for microwave radiofrequency systems

EP 1028523 B1 · Applicant: ALCATEL

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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 9, 2000 and granted June 22, 2005. A European patent lasts at most 20 years from filing, so its term ended February 9, 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 August 9, 2025.
  • 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 9, 2000
PublishedAugust 16, 2000
GrantedJune 22, 2005
Term endedFebruary 9, 2020
Application numberEP 00440039
Classification (CPC)H03F1/3241

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedFeb 9, 2000PublishedAug 16, 2000Patent grantedJune 22, 2005Term endedFeb 9, 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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