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Expired Canadian patentCanada

Device and method for connecting inert anodes for the production of aluminium by fused-salt electrolysis

CA 2539697 C · Owner: Aluminium Pechiney · Inventors: Lamaze, Airy-Pierre

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention relates to an anode assembly (1) for a cell used to produce aluminium by fused-salt electrolysis. The assembly comprises an inert anode (2) in the form of a pocket a connecting conductor (3, 4, 5), mechanical connection means which can cooperate in order to establish a mechanical link between the conductor and the anode and a soldered metal joint or a metal joint which can be formed by soldering (31) and which is arranged either between all or part of at least one surface (20 20, 20') of the open extremity (22) of the anode (2) and all or part of at least one surface (40 40', 40") of the extremity of the connection (42) of the conductor (3 4, 5). The invention makes it …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed September 28, 2004 and granted April 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 28, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 28, 2004
GrantedApril 24, 2012
Term endedSeptember 28, 2024
Patent numberCA 2539697 C
Classification (IPC)C25C3/12 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedSep 28, 2004Patent grantedApril 24, 2012Term endedSep 28, 2024

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.