Patents by Inventor Charles J. Kostie

Charles J. Kostie 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).

  • Electrode geometry design for optimized aluminum resistance spot welding
    Patent number: 6403913
    Abstract: A modification of the electrode geometry for resistance spot welding of aluminum. A ratio of the surface area of the weld nugget to the surface area of the electrode face is about 0.75 to about 1. The diameter of the electrode face is smaller than the industry recommended size and which provides higher current density and reduces the amount of power needed for welding aluminum.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: June 11, 2002
    Assignee: Alcoa Inc.
    Inventors: Donald J. Spinella, Charles J. Kostie