Patents by Inventor Harold R. Kirby

Harold R. Kirby 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).

  • Processing aluminum skim
    Patent number: 4040820
    Abstract: The invention relates to an efficient, salt-free method of recovering metallic aluminum from furnace skim wherein the skim is tumbled for a short period in a rotary furnace at a temperature between 1200.degree. and 1500.degree. F (649.degree.-816.degree. C) to separate the molten aluminum from the oxide portion of the skim. Preferably, after molten aluminum is drained from the rotary furnace, the spent skim is rapidly cooled by adding a relatively cool pebbly or granular material to facilitate the discharge and disposal thereof.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: August 9, 1977
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventors: James A. Loach, Harold R. Kirby