Patents by Inventor Henry M. Demarest

Henry M. Demarest 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 and apparatus for feeding a rotating melter
    Patent number: 4666489
    Abstract: In a rotating vessel for liquefying pulverulent material wherein the pulverulent material forms a lining on sidewall portions of the vessel, pressing means are provided for creating a flattened end portion at the top of the lining onto which additional pulverulent material is fed and subsequently pressed into the lining. The pressing means is preferably a rotationally driven wheel and the pulverulent material may be glass batch. A more stable feeding operation and reduction of dusting are attained.
    Type: Grant
    Filed: December 6, 1985
    Date of Patent: May 19, 1987
    Assignee: PPG Industries, Inc.
    Inventor: Henry M. Demarest
  • Method of melting raw materials for glass or the like using solid fuels or fuel-batch mixtures
    Patent number: 4632687
    Abstract: Thermally fusible material such as glass batch is liquefied using a solid carbonaceous fuel such as coal as the major energy source. In another embodiment, solid or liquid fuel is mixed with the batch material being fed to an initial liquefaction stage. Melting may be advanced further in a subsequent stage where the melt may also be re-oxidized.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: December 30, 1986
    Assignee: PPG Industries, Inc.
    Inventors: Gerald E. Kunkle, Henry M. Demarest, Larry J. Shelestak