Patents by Inventor James O. Steigelman

James O. Steigelman 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).

  • Patent number: 4773928
    Abstract: A process is disclosed for producing plasma type spray powders. The process involves forming, an admixture of a base metal, chromium, aluminum, and yttrium or master alloy powders containing these elements, and dry milling the admixture by high shearing to produce a homogeneous mixture. A slurry of this mixture and an aqueous solution of a binder is then spray dried to produce agglomerates, the major portion of which has a particle size of from about 20 to about 53 microns. This major portion is then separated from the remainder of the agglomerates and sintered in a reducing atmosphere to remove the binder and form a sintered powder. The sintered powder is then passed through a high temperature plasma reactor to melt the powder and produce a homogeneous plasma spray powder.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: September 27, 1988
    Assignee: GTE Products Corporation
    Inventors: David L. Houck, Richard F. Cheney, James O. Steigelman