Process of controlling foam which limits acids mist during electrowinning
CA 1312219 C · Owner: Inco Limited · Inventors: Sanmiya, Tei Stewart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process for measuring foaming capacity of surfactant used in controlling acid mist production during electrowinning. The invention sends a portion of an electrolyte containing surfactant to a test chamber. The electrolyte is gasified in the test chamber to form bubbles which rise and accumulate above the electrolyte in the test chamber. The foam layer has a height proportional to the foaming capacity of the electrolyte. The height of the foam in the test chamber is measured to determine the amount of surfactant to add to the electrolyte for effective foaming in the electrolytic cell.
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 5, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 5, 2010.
- 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.