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Expired European patentEurope

A method for electrical connection and magnetic compensation of aluminium reduction cells, and a system for same

EP 1812626 B1 · Applicant: NORSK HYDRO ASA

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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 September 16, 2005 and granted September 11, 2013. A European patent lasts at most 20 years from filing, so its term ended September 16, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledSeptember 16, 2005
PublishedAugust 1, 2007
GrantedSeptember 11, 2013
Term endedSeptember 16, 2025
Application numberEP 05782514
Classification (CPC)C25C3/16

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedSep 16, 2005PublishedAug 1, 2007Patent grantedSep 11, 2013Term endedSep 16, 2025

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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