Patents by Inventor Frank J. Rohr

Frank J. Rohr 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).

  • High purity mortar suitable for bonding refractory brick
    Patent number: 4246035
    Abstract: A high purity mortor suitable for bonding refractory brick is disclosed. The mortar, which is resistant to attack by molten aluminum, comprises 43 to 89 wt.% alumina aggregate, 10 to 45 wt.% calcium aluminate cement, 0.5 to 10 wt.% zinc borosilicate and 0.1 to 1.5 wt.% boric acid.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: January 20, 1981
    Assignee: Aluminum Company of America
    Inventors: George Maczura, Raymond P. Heilich, Frank J. Rohr