Patents by Inventor William R. Hatfield

William R. Hatfield 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).

  • Method for recovering platinum in a nitric acid plant
    Patent number: 4497657
    Abstract: Improved recovery of platinum lost from the catalyst gauze in a nitric acid plant is obtained by using palladium containing recovery gauzes configured to enhance the mass transfer characteristics of the system.
    Type: Grant
    Filed: April 27, 1983
    Date of Patent: February 5, 1985
    Assignee: Engelhard Corporation
    Inventors: William R. Hatfield, Ronald M. Heck, Thomas H. Hsiung