Patents by Inventor Matthew H. Hulbert

Matthew H. Hulbert 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).

  • Sand filter media and an improved method of purifying water
    Patent number: 4765892
    Abstract: A slow sand filtering system is disclosed, in which an uncovered filter tank has therein a layer of sand, and an effective filter-enhancing amount of zeolite. The zeolite is topped by a growth of schmutzdecke, with the schmutzdecke comprising a layer of living organism selected from the group consisting of algae, plankton, diatoms, protozoa, rotifers and bacteria.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: August 23, 1988
    Assignee: Applied Industrial Materials Corporation
    Inventors: Matthew H. Hulbert, James W. Currier
  • Process for recovery of uranium from wet process H.sub.3 PO.sub.4
    Patent number: 4578249
    Abstract: A process for stripping hexavalent uranium from an organic solution using phosphoric acid containing ferrous ion wherein the ferrous ion is provided by electrolytic reduction of ferric ion with minimal production of hydrogen.
    Type: Grant
    Filed: September 2, 1983
    Date of Patent: March 25, 1986
    Assignee: International Minerals & Chemical Corp.
    Inventors: Viswanathan Srinivasan, Matthew H. Hulbert
  • 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