Method for regulating an electrolysis cell
CA 2439324 C · Owner: Vanvoren, Claude · Inventors: Bonnardel, Olivier; Vanvoren, Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for regulating an electrolysis cell for the production of aluminium by reduction of aluminium dissolved in a melted cryolite bath and includes the addition in the electrolyte bath, during predetermined time intervals p known as periods of a determined quantity Q(p) of aluminium trifluoride (AlF¿3?) determined by the following ratio: Q(p)=Qint(p)-Qcl(p)+Qt(p) where Qint(p) is an integral (or auto-adaptive ) term representing the total real requirements of the cell in terms of AlF¿3? which is calculated from an average Qm(p) of the real intake of AlF¿3? during the last N periods Qcl is a corrective term corresponding to the equivalent quantity of AlF¿3? …
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 February 27, 2002 and granted July 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 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.