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Expired European patentEurope

Monitoring and control device for chloroalcali electrolytic cells with mercury cathode

EP 0068076 B1 · Applicant: Heraeus Elektroden GmbH

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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 March 16, 1982 and granted November 12, 1986. A European patent lasts at most 20 years from filing, so its term ended March 16, 2002.
  • 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 September 16, 2007.
  • 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.
FiledMarch 16, 1982
PublishedJanuary 5, 1983
GrantedNovember 12, 1986
Term endedMarch 16, 2002
Application numberEP 82102107
Classification (CPC)C25B15/04

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedMarch 16, 1982PublishedJan 5, 1983Patent grantedNov 12, 1986Term endedMarch 16, 2002

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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