Patents by Inventor Ross W. Simon

Ross W. Simon 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).

  • Refining of tantalum and tantalum scrap with carbon
    Patent number: 6197082
    Abstract: Tantalum scrap of high oxygen content is recovered and processed to metallurgical grade tantalum by fine participation. Blending with carbon or other appropriate solid reducing agent, melting in a plasma furnace (20) at about tantalum melt temperature while suppressing partial pressure of tantalum oxide gas to minimize tantalum loss of the process.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: March 6, 2001
    Assignee: H.C. Starck, Inc.
    Inventors: Robert A Dorvel, Leonid N. Shekhter, Ross W. Simon
  • Method of making vacuum-packaged, capacitor-grade tantalum powder
    Patent number: 6079186
    Abstract: The performance of capacitor-grade tantalum powder that is vacuum packaged is enhanced. Preventing contact with air reduces the quantity of oxygen that passes through the oxide film and dissolves in the substrate. Lower oxygen in the powder can lower DC leakage in the capacitor made from the powder. Over a 4-month period, vacuum/argon packaging reduces oxygen pick-up in a 50K-class powder by over 200 ppm compared with the same powder stored in conventional packaging.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 27, 2000
    Assignee: H.C. Starck, Inc.
    Inventors: Ross W. Simon, Katsuo Iwabuchi, Hirobumi Ishikawa, Dieter Behrens