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Expired European patentEurope

A method for detecting a target substance in a sample, utilizing pyrylium compound

EP 0684239 B1 · Applicant: CANON KABUSHIKI KAISHA

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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 May 25, 1995 and granted December 10, 2003. A European patent lasts at most 20 years from filing, so its term ended May 25, 2015.
  • 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 November 25, 2020.
  • 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.
FiledMay 25, 1995
PublishedNovember 29, 1995
GrantedDecember 10, 2003
Term endedMay 25, 2015
Application numberEP 95303567
Classification (CPC)G01N33/582 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedMay 25, 1995PublishedNov 29, 1995Patent grantedDec 10, 2003Term endedMay 25, 2015

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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