Process for improving coal
CA 1100072 A · Owner: Hazen Research, Inc. · Inventors: Turner, Ronald L.; Kindig, James K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR IMPROVING COAL JAMES K. KINDIG and RONALD L. TURNER, ABSTRACT OF THE DISCLOSURE In a process for improving coal containing elemental sulfur wherein the coal is treated with a metal containing compound in order to enhance the magnetic susceptibility of various impurities contained within the coal thereby permitting their removal by magnetic separation the improvement, comprising removing at least a portion of the elemental sulfur prior to performing the magnetic susceptibility enhancement treatment.
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 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 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.