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Expired European patentEurope

Instrumental error compensation circuit for flow meter

EP 0100844 B1 · Applicant: Oval Engineering Co., Ltd.

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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 June 21, 1983 and granted November 19, 1987. A European patent lasts at most 20 years from filing, so its term ended June 21, 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 December 21, 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.
FiledJune 21, 1983
PublishedFebruary 22, 1984
GrantedNovember 19, 1987
Term endedJune 21, 2003
Application numberEP 83106049
Classification (CPC)G01F15/00 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJune 21, 1983PublishedFeb 22, 1984Patent grantedNov 19, 1987Term endedJune 21, 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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