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Expired European patentEurope

Tension measuring apparatus and method for piston ring

EP 0877239 B1 · Applicant: Kabushiki Kaisha Riken

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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 9, 1998 and granted August 30, 2000. A European patent lasts at most 20 years from filing, so its term ended April 9, 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 9, 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 9, 1998
PublishedNovember 11, 1998
GrantedAugust 30, 2000
Term endedApril 9, 2018
Application numberEP 98302816
Classification (CPC)G01M13/005

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedApril 9, 1998PublishedNov 11, 1998Patent grantedAug 30, 2000Term endedApril 9, 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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