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Expired European patentEurope

A method of measuring concentrations of odors and a device therefor

EP 0239233 B1 · Applicant: WAKABAYASHI + Co

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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 February 20, 1987 and granted April 17, 1991. A European patent lasts at most 20 years from filing, so its term ended February 20, 2007.
  • 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 August 20, 2012.
  • 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.
FiledFebruary 20, 1987
PublishedSeptember 30, 1987
GrantedApril 17, 1991
Term endedFebruary 20, 2007
Application numberEP 87301502
Classification (CPC)G01N33/02

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedFeb 20, 1987PublishedSep 30, 1987Patent grantedApril 17, 1991Term endedFeb 20, 2007

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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