Method for improving metals recovery using high temperature pressure leaching
CA 2454812 C · Owner: Marsden, John O. · Inventors: Baughman, David R.; Hazen, Wayne W.; Brewer, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a process for recovering metal values from metal-bearing materials. During a reactive process a seeding agent is , introduced to provide a nucleation site for the crystallization and/or growth of solid species which otherwise tend to passivate the reactive process or otherwise encapsulate the metal value, thereby reducing the amount of desired metal values partially or completely encapsulated by such material. The seeding agent may be generated in a number of ways including the recycling of , residue or the introduction of foreign substances. Processes embodying aspects of the present invention may be beneficial for recovering a variety of metals …
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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 24, 2002 and granted February 5, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 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.