Patents by Inventor Suzanne L. Kladder

Suzanne L. Kladder 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).

  • Method of improving precious metal yield in a Merrill-Crowe recovery process
    Patent number: 5215574
    Abstract: A method for improving the yield of gold and silver from a Merrill-Crowe recovery process where the presence of copper effects yield. The method involves the addition of a substoichiometric amount of ethylenediaminetetraacetic acid in combination with a phosphonate and polyacrylic copolymer scale control agent. The method also reduces zinc consumption and controls scaling in the stripping circuit.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: June 1, 1993
    Assignee: Betz Laboratories, Inc.
    Inventors: Suzanne L. Kladder, Terrence W. Mattioli, Gary E. Geiger, James E. Cressman