Metals
CA 1075635 A · Owner: National Research Development Corporation · Inventors: Holland, Frank S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
IMPROVEMENTS IN OR RELATING TO METALS" ABSTRACT OF THE DISCLOSURE, A metal powder e.g. copper or zinc is produced, from a dilute aqueous solution of the metal by subjecting the dilute aqueous solution to electrolysis in a cell having a rotating cylinder cathode in accordance with the equation:- I = KCVx, where I is the current density K is a constant for a given, cell, C is the concentration of metal ion in aqueous solution V is the peripheral velocity of the rotating cylinder cathode and x = 0.7 to 1Ø A diaphragm cell is preferably used. Dilute aqueous solutions treated include mining liquors and viscose rayon plant effluent. A plurality of cells in series may be used or the cathode …
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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 April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 1997.
- 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.