Polymeric sulfide mineral depressants
CA 1338110 C · Owner: Lipp, David Wesley · Inventors: Nagaraj, D. R.; Lipp, David Wesley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the benefication of value sulfide minerals from sulfide ores with selective separation of sulfide minerals which comprises:, a) providing an aqueous pulp slurry of finely-divided liberated ore particles;, b) conditioning said pulp slurry with an effective amount of a synthetic depressant, a sulfide mineral collector and a frothing agent, respectively, said depressant comprising a polymer comprising:, (i) x units of the formula: (ii) y units of the formula:, (iii) z units of the formula: ? Z ?, wherein each of R, R1 and R2, is individually, hydrogen or a, C1-C4 alkyl group R3 is hydrogen, a C1-C4 alkyl group or a C6-C10 aryl, R4 and R5 are, individually hydrogen a C1-C4, …
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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 March 5, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2013.
- 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.