Patents by Inventor Thomas F. McConnell

Thomas F. McConnell 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 for eluting adsorbed gold from carbon
    Patent number: 4968346
    Abstract: Gold in a very dilute water solution is carbon filtered to capture the gold by adsorption; the gold in the filter is then recovered from the carbon by means of a highly-efficient non-explosive low-alcohol water-based eluant including a strong base and an elevated level of sodium or potassium cyanide.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: November 6, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Anthony L. Belsak, Narendrakumar C. Desai, Thomas F. McConnell, Curt A. Williams