Recycle of secondary froth in the hot water process for extracting bitumen from tar sand
CA 1264455 C · Owner: Kwong, Teddy King-Cheung · Inventors: Kwong, Teddy King-Cheung; Leung, Antony H. S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RECYCLE OF SECONDARY FROTH IN THE HOT WATER PROCESS FOR EXTRACTING BITUMEN FROM TAR SAND", ABSTRACT OF THE DISCLOSURE Froth, produced by induced air flotation in the hot water process circuit for extracting bitumen from tar sand is re-, cycled and added to the fresh slurry being introduced to the primary separation vessel. An increase in bitumen recovered as primary froth from the circuit is produced.
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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 January 16, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 2007.
- 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.