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Expired European patentEurope

Device for testing the integrity of an electrode in a potentiometric measuring electrode system

EP 0241601 B1 · Applicant: Yokogawa Europe B.V.

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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 15, 1986 and granted February 7, 1990. A European patent lasts at most 20 years from filing, so its term ended April 15, 2006.
  • 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 15, 2011.
  • 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 15, 1986
PublishedOctober 21, 1987
GrantedFebruary 7, 1990
Term endedApril 15, 2006
Application numberEP 86200640
Classification (CPC)G01N27/4165

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedApril 15, 1986PublishedOct 21, 1987Patent grantedFeb 7, 1990Term endedApril 15, 2006

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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