Production of aluminum compounds and silica from ores
CA 2433448 A1 · Owner: Harel, Simcha · Inventors: Harel, Simcha; Shapira, Lev
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the production of inorganic aluminum substances and amorphous silica from aluminum oxide containing ores comprising: (a) leaching of said , ores with fluorosilicic acid to obtain aluminum fluosilicate solution; (b) filtering said leached solution from insoluble materials; and (c) washing said insoluble materials.
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 December 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2023.
- 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.