Patents by Inventor James H. E. Jeffes

James H. E. Jeffes 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 for containing liquid phases in a vessel
    Patent number: 4261553
    Abstract: In many situations it is desirable for two or more liquid phases of different densities to be contained in a vessel with the upper phase out of contact with the vessel walls. Such a situation is the refining of molten metals, e.g., copper, wherein a layer of corrosive slag exists in the refining process above the molten metal. In conventional furnaces the slag will attack the furnace walls.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: April 14, 1981
    Assignee: National Research Development Corporation
    Inventor: James H. E. Jeffes