Froth flotation method for recovery of bitumen from aqueous suspensions of tar sands
CA 1237689 A · Owner: Brenda Mines Ltd. · Inventors: Greenfeld, Moshe; Cromwell, Clarence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
13-, Abstract of the Disclosure:, A flotation method for improved recovery of bitumen from aqueous suspensions in a tar sands extraction process is disclosed. The method comprises carrying out said flotation with CO2 in the presence of a dispersing/sequestering agent.
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 June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.