Desulfurization of coal using a solution of sodium chloride
CA 1108546 A · Owner: Coalmet Corporation · Inventors: Dondelewski, Michael A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for reducing the sulfur content of coal and the like by treatment with an aqueous solution of sodium chloride. Preferably the solution comprises a source of oxygen as by air or oxygen gas entrained in the solution or by the addition of hydrogen peroxide to the solution.
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 September 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 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.