Patents by Inventor J. David Matthews

J. David Matthews 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).

  • Reducing the tendency of dried coal to spontaneously ignite
    Patent number: 4421520
    Abstract: Mined, crushed, coal particles are dried and then contacted with a water-base dispersion or emulsion of latex paint type solids. The latex paint type solids form an elastic film that reduces the tendency of the dried coal to spontaneously ignite.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: December 20, 1983
    Assignee: Atlantic Richfield Company
    Inventor: J. David Matthews
  • Method for producing a dried coal fuel having a reduced tendency to spontaneously ignite from a low rank coal
    Patent number: 4396394
    Abstract: A method for producing a dried coal fuel having a reduced tendency to spontaneously ignite from a low rank coal by drying the low rank coal and thereafter cooling the dried coal to a temperature below about 100.degree. F. Optionally the dried coal is partially oxidized prior to cooling, and optionally the dried coal is mixed with a deactivating fluid.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: August 2, 1983
    Assignee: Atlantic Richfield Company
    Inventors: Ying-Hsiao Li, James L. Skinner, Donald K. Wunderlich, J. David Matthews, Bernard F. Bonnecaze
  • Method and apparatus for contacting particulate coal and a deactivating fluid
    Patent number: 4396395
    Abstract: A method and apparatus for contacting particulate coal and a deactivating fluid, the apparatus comprising a mist contacting vessel wherein the coal and a deactivating fluid mist are contacted to produce a coal-deactivating fluid mixture. A method for producing the coal-deactivating fluid mixture is disclosed.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: August 2, 1983
    Assignee: Atlantic Richfield Company
    Inventors: James L. Skinner, J. David Matthews