Patents by Inventor Hans H. Schwantje

Hans H. Schwantje 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).

  • Spinel surfaced objects
    Patent number: 4382997
    Abstract: A method for preparing spinel (MgAl.sub.2 O.sub.4) surfaces on alumina or alumino silicate articles or shapes by exposure of the article or shape to molten or vaporous magnesium or magnesium alloy for from two to ten hours under nonpyrophoric conditions.
    Type: Grant
    Filed: September 4, 1980
    Date of Patent: May 10, 1983
    Assignee: The Dow Chemical Company
    Inventors: Walter W. Henslee, Stanley J. Morrow, John S. Lindsey, Christopher P. Christenson, Hans H. Schwantje