Patents by Inventor Robert H. Spoonts

Robert H. Spoonts 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).

  • Alumina production by nitric acid extraction of clay
    Patent number: 4246239
    Abstract: Alumina values are extracted from clay by the steps of pelletizing into spherical particles, calcining the pellets in a fluidized bed reactor, extracting the clay in about 30-40% nitric acid, purifying the basic aluminum nitrate produced, crystallizing aluminum nitrate nonahydrate, decomposing the nonahydrate in at least three steps, calcining the produced alumina and reconstituting the NO.sub.x gases to nitric acid.
    Type: Grant
    Filed: July 27, 1979
    Date of Patent: January 20, 1981
    Assignee: Reynolds Metals Company
    Inventors: John L. Dewey, Charles E. Scott, James F. Kane, Claud L. Stratton, John C. Rushing, Robert H. Spoonts