Patents by Inventor Ronald David Crozier

Ronald David Crozier 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).

  • Flotation of copper sulfide ores with improved thionocarbamates
    Patent number: 3975264
    Abstract: High-purity dialkyl thionocarbamates are economically produced by reacting suitable xanthates with alkyl amines in the presence of a dissolved catalyst. Nickel and palladium salts are preferred catalysts. Thionocarbamates produced by the method of the invention are a desirable flotation reagent for certain refractory copper sulfide ores.
    Type: Grant
    Filed: June 26, 1974
    Date of Patent: August 17, 1976
    Assignee: Minerec Corporation
    Inventors: Franklin Anderson Bolth, Ronald David Crozier, Lawrence Evans Strow