Method for coal feed slurry preparation
CA 1184764 A · Owner: Pittsburg & Midway Coal Mining Co. (The) · Inventors: Gorski, Alan B.; Schmid, Bruce K.; Naylor, Joseph D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for producing a feed slurry containing about 30% to about 40% coal for pumping to a high pressure preheating zone of a coal liquefaction process. Coal having a particle size distribution such that at least 80% passes through a 100 mesh screen and at least 40% passes through a 325 mesh screen is mixed with a slurry recycled from the liquefaction process in a mixing zone at a temperature of from about 350°F to about 450°F for not more than fifteen minutes.
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 April 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 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.