Patents by Inventor Richard W. Hildreth

Richard W. Hildreth 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).

  • Capacitor grade tantalum powder
    Patent number: 4957541
    Abstract: Tantalum powders of capacitor grade are provided, containing interacting silicon and phosphorous dopants to effect low D.C. leakage of electrolytic capacitors having anodes made from such powders, with anodic formation at low temperatures (40.degree.-60.degree. C.), consistent with high capacitance.
    Type: Grant
    Filed: November 1, 1988
    Date of Patent: September 18, 1990
    Assignee: NRC, Inc.
    Inventors: Terrance B. Tripp, Richard W. Hildreth