Patents by Inventor Leo V. Szczepanski

Leo V. Szczepanski 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).

  • High efficiency gold recovery method
    Patent number: 4168971
    Abstract: A method and system for recovering gold and other noble metals from geologic bodies of fresh and salt water wherein a mixture of water and sediment is drawn from the body of water, passed as an influent through a cation exchanger of the type containing crosslinked polymer resinous particulates charged with sodium or hydrogen at controlled flow rates, and the exchanger effluent returned to the body of water.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: September 25, 1979
    Inventor: Leo V. Szczepanski