Process for recovering hydrocarbons from carbonaceous materials
CA 1263330 C · Owner: Exxon Research And Engineering Company · Inventors: Mcmath, Henry G. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for retorting a solid carbonaceous material at elevated temperatures wherein a portion of the spent solids withdrawn from the retort is heated to a temperature within the range from about 1600°F to about 2400°F and then recycled to the retort as a source of heat at a temperature within the range from about 650°F to about 1600°F. When the improved process of this invention is operated in this manner, the amount of liquid product obtained is maximized and the amount of gaseous product minimized. Moreover the integrity of the particles thus recycled is improved and the amount of fines in the liquid product correspondingly reduced.
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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 November 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 28, 2006.
- 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.