Patents by Inventor Earle S. Thall

Earle S. Thall 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 of blackening surfaces of steel parts with wet nitrogen
    Patent number: 4448612
    Abstract: A gaseous mixture of nitrogen and water vapor (dew point of about -8.degree. to 32.degree. C.), heated to 550.degree. to 750.degree. C., contacts the surfaces of a steel part for a sufficient time to produce adherent, deep-black layers on the part. Steel aperture masks and support frames for color television picture tubes may be blackened by the novel method.
    Type: Grant
    Filed: May 3, 1983
    Date of Patent: May 15, 1984
    Assignee: RCA Corporation
    Inventors: Chris W. Ebert, Earle S. Thall
  • Method for blackening the surfaces of a body of ferrous metal
    Patent number: 4149908
    Abstract: The surfaces of a ferrous metal body are coated with a heat-fusible, chemically-oxidizing composition, such as sodium nitrate or potassium nitrate. Then, the coated body is heated above the melting temperature of the coating, preferably above 350.degree. C., until the coating melts, spreads over the surfaces, reacts with the material of the surfaces and produces a black oxide coating thereon.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: April 17, 1979
    Assignee: RCA Corporation
    Inventors: Earle S. Thall, John J. Moscony