Patents by Inventor Ralph W. Parham, Jr.

Ralph W. Parham, Jr. 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).

  • Impressed current cathodic protection system employing cobalt spinel structured anode
    Patent number: H544
    Abstract: Impressed current cathodic protection systems employing an anode having a cobalt spinel type surface, said surface having the formula: M.sub.x Z.sub.y Co.sub.(3-(x+y)) O.sub.4, where M is a metal or a mixture of two or more metals selected from the group of metals contained in Groups IB, IIA, and IIB of the periodic table of the elements, where Z is a metal or a mixture of two or more metals selected from the group of metals contained in Group IA of the periodic table of the elements, where 0.ltoreq.x.ltoreq.1, where 0.ltoreq.y.ltoreq.0.5, and where 0.ltoreq.(x+2y).ltoreq.1.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: November 1, 1988
    Assignee: The Dow Chemical Company
    Inventors: Raul A. Castillo, Donald L. Caldwell, Ralph W. Parham, Jr.