Patents by Inventor Ray A. Henrichsen

Ray A. Henrichsen 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).

  • Refractory for aluminum-melting furnaces
    Patent number: 4126474
    Abstract: An improved alumina or alumino-silicate refractory for lining aluminum-melting furnaces and other containers for molten aluminum including 0.5 to 30% by weight of BaSO.sub.4. The addition of BaSO.sub.4 to a phosphate-bonded or phosphate-free plastic, ramming mix, brick, mortar, or castables eliminates metal penetration and reduces dross and metal adherence.
    Type: Grant
    Filed: August 19, 1977
    Date of Patent: November 21, 1978
    Assignee: General Refractories Company
    Inventors: Raymond W. Talley, Ray A. Henrichsen, Wate T. Bakker