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Expired European patentEurope

Titration reagent for the determination of small amounts of water and method of using it

EP 0127740 B1 · Applicant: RIEDEL-DE HAEN AKTIENGESELLSCHAFT

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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 December 22, 1980 and granted May 28, 1986. A European patent lasts at most 20 years from filing, so its term ended December 22, 2000.
  • 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 June 22, 2006.
  • 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.
FiledDecember 22, 1980
PublishedDecember 12, 1984
GrantedMay 28, 1986
Term endedDecember 22, 2000
Application numberEP 84103174
Classification (CPC)G01N31/168

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedDec 22, 1980PublishedDec 12, 1984Patent grantedMay 28, 1986Term endedDec 22, 2000

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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