Patents by Inventor Cynthia A. Van Savage

Cynthia A. Van Savage 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).

  • Stripping metals from spent catalysts
    Patent number: 4585628
    Abstract: Spent catalysts are extracted for removal of catalytic metals from inert supports by oxidizing subvalent metals in a solution of a ligand which forms a soluble stable complex with the oxidized metal. The ligands are salts of 1,1-dithiolate, dithiocarbimate and dithiocarbamate dianions for extraction in water and of dithiocarbamate monoions for extraction in organic solvents.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: April 29, 1986
    Assignee: American Cyanamid Company
    Inventors: Robert G. Fischer, Jr., Cynthia A. Van Savage