Patents by Inventor James A. Pierret

James A. Pierret 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: 4235629
    Abstract: Tantalum and tantalum-rich alloys, particularly in wire form, are stabilized against embrittlement by the addition of 50 to 700 parts per million of silicon and optionally with the further addition of 100 to 500 parts per million of carbon.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: November 25, 1980
    Assignee: Fansteel Inc.
    Inventors: Harold G. Marsh, James A. Pierret
  • Patent number: 4128421
    Abstract: Tantalum and tantalum-rich alloys, particularly in wire form, are stabilized against embrittlement by the addition of 50 to 700 parts per million of silicon and optionally with the further addition of 100 to 500 parts per million of carbon.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: December 5, 1978
    Inventors: Harold G. Marsh, James A. Pierret
  • Patent number: 4062679
    Abstract: Tantalum and tantalum-rich alloys, particularly in wire form, are stabilized against embrittlement by the addition of 50 to 700 parts per million of silicon and optionally with the further addition of 100 to 500 parts per million of carbon.
    Type: Grant
    Filed: March 29, 1973
    Date of Patent: December 13, 1977
    Assignee: Fansteel Inc.
    Inventors: Harold G. Marsh, James A. Pierret
  • Patent number: 3934179
    Abstract: An anode for electrolytic devices formed from pressed and sintered compacts of an agglomerated refractory metal powder comprised of polynodal granules of adhered particles with the nodes being of a size the same order of magnitude as the size of the individual particles. Such agglomerated powder is produced by the method including the steps of heating a powder under chemically non-reactive conditions to effect agglomeration between the powder particles, and subsequently crushing the resultant particulate porous agglomerated mass to form said agglomerated polynodal granules. The anodes combine low green and sintered density, equivalent series resistance, dissipation factor and D.C. leakage with a high specific capacitance.
    Type: Grant
    Filed: March 5, 1975
    Date of Patent: January 20, 1976
    Assignee: Fansteel Inc.
    Inventor: James A. Pierret