Electrolytic production of high purity aluminum using ceramic inert anodes
CA 2443124 A1 · Owner: Dimilia, Robert A. · Inventors: Weirauch, Douglas A.; Ray, Siba P.; Dynys, Joseph M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of producing commercial purity aluminum in an electrolytic reduction cell comprising ceramic inert anodes is disclosed. The method produces aluminum having acceptable levels of Fe Cu and Ni impurities. The ceramic , inert anodes used in the process may comprise oxides containing Fe and Ni as , well as other oxides, metals and/or dopants.
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 April 12, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 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.