Patents by Inventor John F. Leslie

John F. Leslie 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).

  • Biological flocculation of mineral slimes
    Patent number: 4456532
    Abstract: A process for the consolidation of mineral slimes resulting from the beneficiation of ores comprising the steps of mixing the slimes with a microorganism species or a mixture thereof or ruptured or dried cells thereof, or a fermentation beer on which the organism was grown wherein the organism is selected from the group of cyanobacteria and allowing the mixture to separate into a clear upper layer and a consolidated slimes lower layer.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: June 26, 1984
    Assignee: International Minerals & Chemical Corp.
    Inventors: John F. Leslie, Randolph L. Greasham, Matthew H. Hulbert