Patents by Inventor Raphael F. Matson

Raphael F. Matson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the recovery of gold from carbonaceous ores
    Patent number: 4289532
    Abstract: The recovery of gold from refractory carbonaceous gold-containing ores by cyanidation techniques is improved by subjecting an oxidized slurry of this type of ores to simultaneous cyanidation and countercurrent granular activated carbon adsorption in two or more stages. The gold transfers to the carbon and may be separated from it by conventional methods.
    Type: Grant
    Filed: February 29, 1980
    Date of Patent: September 15, 1981
    Assignee: Freeport Minerals Company
    Inventors: Raphael F. Matson, Bernard M. Fisher