Patents by Inventor David B. Swanson

David B. Swanson 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).

  • Processing finely divided solids on a continuous vacuum belt filter
    Patent number: 3943233
    Abstract: Disclosed is a method for subjecting a finely divided solid to a series of processing steps on a single horizontal vacuum belt filter wherein the processing includes a liquid-solid mass transfer function, such as ion-exchange, carried out by percolation, and this step is followed by at least one step, such as washing, in which rapid passage of a large volume of liquid through the solid takes place. The method is used to ion-exchange zeolitic microspheres in the production of a fluid cracking catalyst.
    Type: Grant
    Filed: February 20, 1974
    Date of Patent: March 9, 1976
    Assignee: Engelhard Minerals & Chemicals Corporation
    Inventors: David B. Swanson, Walter L. Haden, Jr.