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Expired European patentEurope

Method of constant-current polarization voltage and apparatus for karl-fischer technique

EP 1024359 B1 · Applicant: Mitsubishi Chemical Corporation

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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 August 17, 1999 and granted March 19, 2008. A European patent lasts at most 20 years from filing, so its term ended August 17, 2019.
  • 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 February 17, 2025.
  • 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.
FiledAugust 17, 1999
PublishedAugust 2, 2000
GrantedMarch 19, 2008
Term endedAugust 17, 2019
Application numberEP 99937088
Classification (CPC)G01N31/168

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedAug 17, 1999PublishedAug 2, 2000Patent grantedMarch 19, 2008Term endedAug 17, 2019

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

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