Patents by Inventor Craig J. Bartkowiak

Craig J. Bartkowiak 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).

  • Process for densification of powdered ceramics and cermets at temperatures above 1400 degrees centigrade
    Patent number: 5374392
    Abstract: Densify powdered materials, either ceramic or metal or both, at temperatures of 1400.degree. C. or higher using a fluid die fabricated from a mixture of alumina and a calcium aluminate cement. The fluid die may be separated from a fluid pressure-transmitting medium by a barrier material such as graphite foil.
    Type: Grant
    Filed: December 4, 1991
    Date of Patent: December 20, 1994
    Assignee: The Dow Chemical Company
    Inventors: James S. Skelcey, Craig J. Bartkowiak