Separation of solids from coal liquids with intermittent addition of an additive
CA 1111795 A · Owner: Gulf Research & Development Company · Inventors: Carr, Norman L.; Mcginnis, Edgar L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Ash-containing solids are separated from coal liquid by adding spaced increments of alcohol to said coal liquid with a, time interval of 30 seconds to 3 hours between addition of said increments, followed by a solids-liquid separation step. -1-
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 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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.