Patents by Inventor Leo G. Gibbons

Leo G. Gibbons 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).

  • Tantalum production via a reduction of K2TAF7, with diluent salt, with reducing agent provided in a fast series of slug additions
    Patent number: 5442978
    Abstract: Fine tantalum powder of high surface area, high capacitance, low leakage and high breakdown voltage is produced by sodium reduction of highly dilute fluotantalate salt charges at high reaction temperatures and stepwise additions of the sodium reducing agent in a time-series of substantially even weight slugs added over the whole course of the reduction reaction to a melt of the charge and using the small exotherm of reduction provided by each slug as a temperature control factor.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: August 22, 1995
    Assignee: H. C. Starck, Inc.
    Inventors: Richard Hildreth, Malcolm Shaw, Terrance B. Tripp, Leo G. Gibbons