Extraction process for metals like gold and platinum including fine grinding, pulping and oxygenating
CA 2590531 C · Owner: Singh, Adrian · Inventors: Singh, Adrian; Tinniswood, Brian; Imhof, Rainer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a process for obtaining metal values typically base , metals, platinum or gold from a feed material. In a first step of the process of the invention, feed material containing metal values is ground to a particle size d90 of 100 microns or less to form an ultra fine pulp. In a second step of the process of the invention the ultra fine ground pulp from , the first step is oxygenated by pumping it in multiple passes through an inline high shear static oxygenation device (30) while re-circulating it on a , tank (28) or any other vessel. The process of the invention results in a significant reduction in the required leach time improved recoveries, reduced , cyanide …
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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 December 15, 2005 and granted October 28, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.