Patents by Inventor Bill A. Hancock

Bill A. Hancock 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).

  • Treatment of mineral and alkali metal carbonate slurries
    Patent number: 5360600
    Abstract: The present invention provides a process for recovering alkali carbonates such as alkali sesquicarbonates from slurries of minerals such as Trona which contain those carbonates as well as clays and shales. The invention further provides a method for recovering alkaline earth carbonates from caustic slurries of those carbonates, as well as to clarifying the supernatant liquids which result from recovery of the alkaline earth carbonates.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: November 1, 1994
    Assignee: Cytec Technology Corp.
    Inventors: Bill A. Hancock, Shane D. Fleming
  • Flotation process for purifying calcite
    Patent number: 5261539
    Abstract: Alkoxylated alkyl amines and alkoxylated alkyl guanidines are excellent collectors when used in mineral froth flotation to remove quartz, micaceous minerals, chlorite, pyrite and other mineral impurities from finely ground calcium carbonate to control tint, color, and abrasiveness.
    Type: Grant
    Filed: October 7, 1992
    Date of Patent: November 16, 1993
    Assignee: American Cyanamid Company
    Inventors: Bill A. Hancock, Samuel S. Wang