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Expired European patentEurope

Cathode bar comprising a metal sole for hall-heroult electrolysis tanks

EP 0144371 B1 · Applicant: ALUMINIUM PECHINEY

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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 May 14, 1984 and granted September 30, 1987. A European patent lasts at most 20 years from filing, so its term ended May 14, 2004.
  • 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 November 14, 2009.
  • 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.
FiledMay 14, 1984
PublishedJune 19, 1985
GrantedSeptember 30, 1987
Term endedMay 14, 2004
Application numberEP 84902015
Classification (CPC)C25C3/16

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedMay 14, 1984PublishedJune 19, 1985Patent grantedSep 30, 1987Term endedMay 14, 2004

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.