Patents by Inventor Donald Edwin Zipperian

Donald Edwin Zipperian 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).

  • Concentration of ore by flotation with solutions of aqueous dithiophosphates and thionocarbamate as collector
    Patent number: 4040950
    Abstract: A process for flotation of copper sulfide values from copper bearing ores wherein a collector that comprises an aqueous solution of a salt of a dialkyl thiophosphate and an N-alkyl O-alkyl thionocarbamate dissolved therein, is employed.
    Type: Grant
    Filed: June 6, 1975
    Date of Patent: August 9, 1977
    Assignee: American Cyanamid Company
    Inventors: Donald Edwin Zipperian, James Allen Jones, Thomas Brian Buza