Modification of copper/iron selectivity in oxime-based copper solvent extraction systems
CA 2602595 C · Owner: Campbell, John · Inventors: Campbell, John; Cramer, Keith Alan; Maes, Charles J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A solvent extraction composition for the recovery of metals particularly , copper and iron, from leach solutions comprises one or more , orthohydroxyarylaldoximes and/or one or more orthohydroxyarylketoximes and , one or more selectivity modifiers consisting of phosphinic and/or phosphonic acids, and salts and esters therefore and optionally one or more equilibrium modifiers is provided. The solvent extractant formulation enables to achieve controlled respectively desired metal transfer ratio's.
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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 March 23, 2006 and granted April 22, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 23, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.