Sweating
CA 1112196 A · Owner: Shell Canada Limited · Inventors: Weitjes, Hendrikus; Wessels, Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for sweating wax- and oil-containing petroleum feedstock comprises charging molten feedstock to a sweating vessel, cooling the molten feedstock to form solid feedstock heating the solid feedstock so that the oil separates therefrom and drains out of the sweating vessel and removing the residual wax from the sweating vessel, characterized in that the molten feedstock is vibrated during the cooling thereof.
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
- Granted November 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 1998.
- 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.