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Expired European patentEurope

Attenuation equalizer for transmission lines

EP 0872961 B1 · Applicant: HEWLETT-PACKARD COMPANY

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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 January 15, 1998 and granted March 29, 2000. A European patent lasts at most 20 years from filing, so its term ended January 15, 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 July 15, 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.
FiledJanuary 15, 1998
PublishedOctober 21, 1998
GrantedMarch 29, 2000
Term endedJanuary 15, 2018
Application numberEP 98100597
Classification (CPC)H04L25/03885 +1 more

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedJan 15, 1998PublishedOct 21, 1998Patent grantedMarch 29, 2000Term endedJan 15, 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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