Patents by Inventor Dana Howard Campbell

Dana Howard Campbell 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).

  • Surface treatment for improved hardness and corrosion resistance
    Patent number: 6497772
    Abstract: An article is protected with a wear-resistant coating. The wear-coated article is thereafter treated to produce a chemical conversion coating on any portions of the surface of the article accessible through micropores in the wear-resistant coating. For steel articles, the wear-resistant coating is preferably a titanium nitride-based intermetallic compound such as TiN, Ti2N, (TiAl)N, Ti(CN), (TiAl)(CN), ZrN, and CrN, and the chemical conversion coating is preferably a phosphate-based compound.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: December 24, 2002
    Assignee: Molecular Metallurgy, Inc.
    Inventors: Nathan K. Meckel, Dana Howard Campbell