Froth flotation process
CA 1181872 A · Owner: American Cyanamid Company · Inventors: Wang, Samuel S.; Scanlon, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the recovery of mineral values by froth flotation in an aqueous medium employing a novel frother. Frothers prepared by Michael addition between alpha, beta-unsaturated ethylenic compounds and either alcohols or amines or by the condensation of HCN aldehydes/ketones, with either alcohols or amines have been found to be effective in the froth flotation system and capable of reducing the required collector consumption.
Read the whole patent
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 January 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 2002.
- 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.