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Expired European patentEurope

Process for the continuous monitoring of the dissolved metal concentration in a molten salts bath and its use in the continuous feeding of these metal salts to an electrolysis cell

EP 0198775 B1 · Applicant: PECHINEY

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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 26, 1986 and granted May 25, 1988. A European patent lasts at most 20 years from filing, so its term ended March 26, 2006.
  • 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 26, 2011.
  • 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 26, 1986
PublishedOctober 22, 1986
GrantedMay 25, 1988
Term endedMarch 26, 2006
Application numberEP 86420087
Classification (CPC)C25C7/06

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMarch 26, 1986PublishedOct 22, 1986Patent grantedMay 25, 1988Term endedMarch 26, 2006

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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