Recovery of hydrocarbons from aqueous tailings
CA 1165713 A · Owner: Petrolite Corporation · Inventors: Martin, Robert B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The recovery of hydrocarbons from the cleanup of froth produced in the hot water process of removing bitumen from tar sands is enhanced by contacting the aqueous phase separated from the froth (i.e. the aqueous tailings) with a diluent for the bitumen recovering an organic phase containing diluent and bitumen and recycling this material into the froth cleanup process. The process is also applicable to the recovery of hydrocarbons from other aqueous tailings containing them.
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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 April 17, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 2001.
- 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.