Tailings thickening and treatment with gas bubble injection
CA 2867540 C · Owner: Fort Hills Energy L.P. · Inventors: Hindle, W. Scott; Ringstrom, John Patrick; Sharpe, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Techniques for the treatment of oil sand tailings that may result from a paraffinic froth treatment operation may include thickening the oil sand tailings in a thickener vessel including outlets for withdrawing underflow and overflow components and a device such as a sparge apparatus, for providing gas bubbles into the thickening vessel.
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
- Filed January 8, 2004 and granted June 27, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 8, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2026.
- 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.