Patents by Inventor Preston B. Gladin

Preston B. Gladin 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).

  • Selective separation of finely-divided minerals by addition of selective collector reagent and centrifugation
    Patent number: 5358120
    Abstract: Separation of impurities from kaolin clay is accomplished by conditioning a dispersed aqueous pulp of the clay with an anionic flotation collector, followed by centrifugation or the like to cause the impurities to settle from a dispersed pulp of the clay without an intermediate froth flotation step or a flotation waste froth is centrifuged or hydrocloned to recover valuable kaolin contained in the froth.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: October 25, 1994
    Assignee: Engelhard Corporation
    Inventors: George E. Gantt, Thomas J. Adkisson, Preston B. Gladin, Randall E. Ussery, Jr.
  • Selective separation of finely-divided minerals by addition of selective collector reagent and centrifugation
    Patent number: 5311997
    Abstract: Separation of impurities from kaolin clay is accomplished by conditioning a dispersed aqueous pulp of the clay with an anionic flotation collector, followed by centrifugation or hydrocloning to cause the impurities to settle from a dispersed pulp of the clay without an intermediate froth flotation step or a flotation waste froth is centrifuged or hydrocloned to recover valuable kaolin contained in the froth.
    Type: Grant
    Filed: December 9, 1992
    Date of Patent: May 17, 1994
    Assignee: Engelhard Corporation
    Inventors: George E. Gantt, Thomas J. Adkisson, Preston B. Gladin, Randall E. Ussery, Jr.