Patents by Inventor Charles E. Mosheim

Charles E. Mosheim 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).

  • Recovery of spent catalyst
    Patent number: 5620936
    Abstract: A process is disclosed for converting a spent catalyst from conventional fluorination processes into a commercially useful tantalum or niobium salt such as K.sub.2 TaF.sub.7 or K.sub.2 NbF.sub.7. The process broadly relates to dissolving the spent catalyst in water or an aqueous hydrofluoric acid solution, separating and disposing the undissolved residue, extracting the aqueous solution with a suitable solvent such as methyl isobutyl ketone (MIBK), and obtaining useful tantalum products from the MIBK solution such as a tantalum salt.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: April 15, 1997
    Assignees: E. I. DuPont de Nemours and Company, Cabot Performance Material
    Inventors: Vinci M. Felix, Charles E. Mosheim, Norman A. Carlson
  • Tantalum base alloys
    Patent number: 5171379
    Abstract: A wrought metal alloy product having a tantalum or niobium base metal, 10 to 1000 ppm silicon, and 10 to 10000 ppm yttrium nitride. Fine uniform grain size contributes to improved ductility.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: December 15, 1992
    Assignee: Cabot Corporation
    Inventors: Prabhat Kumar, Charles E. Mosheim
  • Tantalum powder process
    Patent number: 4684399
    Abstract: A reduction process for producing tantalum powder wherein a tantalum compound is introduced, in a continuous or incremental manner, to a reactor, during the course of the reduction reaction.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: August 4, 1987
    Assignee: Cabot Corporation
    Inventors: Roger M. Bergman, Charles E. Mosheim