Conditioning of oil sands and bitumen separation therefrom
CA 2068895 A1 · Owner: Sparks, Bryan D. · Inventors: Meadus, F. Weldon; Sparks, Bryan D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the conditioning of oil sands to increase the amount of high fines reject to permit separation of the oil sands into a high fines fraction comprising 5 to 25 % of the feed and a low fines fraction comprising 95 to 75 % of the feed. Having separated the feed in this manner, a hybrid Hot Water Extraction/Anhydrous Extraction process may be advantageously employed to extract bitumen from the low fines and high fines fractions, respectively.
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 October 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2013.
- 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.