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Expired European patentEurope

Duplexer with stepped impedance resonators

EP 1025608 B1 · Applicant: Electronics and Telecommunications Research Institute

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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 April 2, 1998 and granted June 21, 2006. A European patent lasts at most 20 years from filing, so its term ended April 2, 2018.
  • 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 October 2, 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.
FiledApril 2, 1998
PublishedAugust 9, 2000
GrantedJune 21, 2006
Term endedApril 2, 2018
Application numberEP 98914132
Classification (CPC)H01P1/2136

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedApril 2, 1998PublishedAug 9, 2000Patent grantedJune 21, 2006Term endedApril 2, 2018

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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