Processing complex mineral ores
CA 2074710 A1 · Owner: Klymowsky, Irinaeus Boris · Inventors: Notebaart, Cornelis Wilhelmus; Klymowsky, Irinaeus Boris; Megens, Hendricus Johannes Josephus Johanna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the recovery of metals from complex mineral ore material, which comprises k metals for the winning of at least i of said k metals, the process comprises:, a) a grinding step for grinding the ore material to liberate to an effective degree minerals comprising at least one of said i metals from gangue minerals;, b) a flotation conditioning step; c) at least one flotation step for floating said ground ore material resulting in a flotation concentrate stream and a, flotation tailings stream, one of said streams containing a minerals concentrate comprising said i metals concentrated to an effective recovery;, d) a regrinding step for regrinding the minerals concentrate containing …
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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 July 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2014.
- 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.