Time-controlled processes for agglomerating coal
CA 1296899 C · Owner: Burry, William M. · Inventors: Burry, William M.; Keller, Douglas V. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods of recovering agglomerated particles of coal from a composite of coal and mineral matter. If necessary to reach an appropriate top size the raw coal, can be ground. In any event the raw coal is mixed with an appropriate carrier to form an aqueous slurry. The raw coal may then be comminuted in the aqueous slurry until resolved into separate, particulate phases of coal and mineral matter although this step is unnecessary if the coal has a top size of not more than 0.6 mm and if an ultrapure product coal is not required. Next an, agglomerant is mixed with the slurry; an additive is incorporated into the slurry to control the agglomeration time and/or water content of the product coal …
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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 March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
- 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.