A method for designing a pre-bake electrolysis cell system and an arrangement for use in this system
CA 2467019 C · Owner: Laegreid, Stig · Inventors: Laegreid, Stig; Bjorbekk, Lars Magne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns a method and an arrangement for use in an electrolysis cell system, comprising a hall with electrolysis cells (C) that use , anodes of the pre-bake type for the production of aluminium. The electrolysis cells , are arranged in two parallel rows at a distance from each other forming an area for , transport of materials to and from the cells between them. A centrally arranged , structure is located between said rows of cells. The hall further comprises temporary storage of consumed anodes and other material that are removed from the cells, in closable storage arrangements. Hot gases are extractable from the , storage arrangements that are arranged in a …
Read the whole patent
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 November 1, 2002 and granted August 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.