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Expired European patentEurope

Bath temperature measurement device for an aluminium/molten salt electrolytic cell

EP 0091399 B1 · Applicant: SCHWEIZERISCHE ALUMINIUM AG

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Overview

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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 14, 1983 and granted May 28, 1986. A European patent lasts at most 20 years from filing, so its term ended March 14, 2003.
  • 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 14, 2008.
  • 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 14, 1983
PublishedOctober 12, 1983
GrantedMay 28, 1986
Term endedMarch 14, 2003
Application numberEP 83810103
Classification (CPC)G01J5/02 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMarch 14, 1983PublishedOct 12, 1983Patent grantedMay 28, 1986Term endedMarch 14, 2003

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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