Patents by Inventor Carroll L. Deemer

Carroll L. Deemer 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 heat treating structural members
    Patent number: 4394194
    Abstract: The present invention relates generally to an improved method and apparatus for induction heat treating and restraint quenching structural members of carbon steel, to a uniform martensitic structure, such that distortion of the member due to rapid quenching is controlled to a minimum. More specifically, the member is generally heated by induction in two stages generally to austenitizing temperature in the range of 1450.degree. to 1750.degree. F. Then the member is liquid quenched under restraint to below 1000.degree. F. to minimize distortion and finally tempered under restraint at a temperature in the range of 750.degree. to 1250.degree. F. Such structural members attain minimum physical properties after heat treating in the range of 110,000 psi yield strength and 125,000 psi tensile strength.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: July 19, 1983
    Assignee: Midland Steel Products
    Inventors: George L. Satava, Carroll L. Deemer