Electrowinning of metals from sulphide ores and products obtained therefrom
CA 1136577 A · Owner: Dedenus, Robert N. · Inventors: Dedenus, Robert N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with a method and an apparatus for producing a water soluble sulphide as a by-product of the electrowinning of metals from sulphide ores. The method of the invention comprises (a) leaching the sulphide ore in a water soluble sulphide solution; (b) adding alkali to the solution of step (a); and (c) electrolysing the solution of step (b) so as to deposit metal at the cathode and obtain the water soluble sulphide. this method is carried out according to the invention in an apparatus which comprises (i) at least one primary leaching tank wherein the sulphide ore is leached in the presence of a water soluble sulphide; (ii) at least one secondary leaching tank and …
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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
- Granted November 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
- 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
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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.