Method of autogenously drying coal
CA 1234973 A · Owner: Amax Inc. · Inventors: Wicker, Gordon R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a method for drying coal particularly, sub-bituminous coal in a packed bed configuration wherein coal, is ventilated by an oxygen-containing gas so hat there is a heated zone wherein autogenous drying occurs. In particular counter current ventilation is used to accomplish preheating drying and evaporative cooling in three contiguous subzones. The process for drying provides for regulating the movement of coal and the flow of incoming air so as to achieve by exothermic oxidation a temperature not greater than 250°F.
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 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 2005.
- 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.