Method of treating heavy oil
CA 1185203 A · Owner: Toyo Engineering Corporation · Inventors: Washimi, Koichi; Tanji, Tsuneo; Matsumiya, Saburo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method of treating-heavy oil, in which a gas and a volatile oil fraction produced by thermally decomposing petroleum heavy oil are distilled off a, thermal decomposition residue withdrawn in the liquid state is brought into contact with a part of the volatile oil fraction as a solvent to extract the solvent-soluble component in the thermal decomposition residue, and then an extraction residue is separated as solid particles from the solvent, an improvement is disclosed which comprises fractionating the volatile oil fraction used as the solvent into two or more sub-fractions having different boiling points from each other on condensing the volatile oil fraction in a fractionating …
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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 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 2002.
- 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.