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Expired European patentEurope

Pressure variation detecting type leakage inspection equipment

EP 0139752 B1 · Applicant: KABUSHIKI KAISHA KOSUMO KEIKI

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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 March 18, 1983 and granted July 6, 1988. A European patent lasts at most 20 years from filing, so its term ended March 18, 2003.
  • 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 September 18, 2008.
  • 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.
FiledMarch 18, 1983
PublishedMay 8, 1985
GrantedJuly 6, 1988
Term endedMarch 18, 2003
Application numberEP 83900963
Classification (CPC)G01M3/3263

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMarch 18, 1983PublishedMay 8, 1985Patent grantedJuly 6, 1988Term endedMarch 18, 2003

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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