Treatment of tumbler reject
CA 1066643 A · Owner: Majesty (Her) The Queen In Right Of Canada, As Represented By The Minist Er Of Energy, Mines And Resources · Inventors: Porteous, Kenneth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TREATMENT OF TUMBLER REJECT", ABSTRACT OF THE DISCLOSURE In the hot water process wherein tar sand is slurried in a tumbler with hot water and sodium hydroxide oversized material, rejected from the tumbler is mixed with, a portion of slurry flood water in a second slurrying device and subjected therein to heating and dispersal of bitumen associated with the rejects. A bitumen-containing slurry is produced from the second device and this slurry is combined with the tumbler slurry and subsequently subjected to flotation to recover bitumen.
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 November 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 20, 1996.
- 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.