Patents by Inventor Richard H. Featherston

Richard H. Featherston 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).

  • Extraction of alumina from bauxite ores
    Patent number: 3966874
    Abstract: An improved wet caustic process of the Bayer method for the extraction of alumina from bauxite containing amounts of both goethite and a monohydrated alumina wherein lime is added only after the bauxite slurry has been heated to a digestion temperature of at least 200.degree.C.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: June 29, 1976
    Assignee: Reynolds Metals Company
    Inventors: Richard H. Featherston, Joseph P. Fischer, Meriwether L. Garing, James R. Wright