Patents by Inventor Robert A. Rucker

Robert A. Rucker 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 cement
    Patent number: 4710225
    Abstract: A composition of refractory cement includes about 65 percent by weight of refractory clay, about 15 percent by weight of ball clay and about 20 percent by weight of calcium aluminate cement to yield a product composition which is air-setting, acid resistant, and non water soluble. The composition ingredients are so sized to provide the product composition with a screen analysis of about 2 percent to 6 percent +40 mesh, about 20 percent to 35 percent +70 mesh, 10 percent to 25 percent +100 mesh and 40 percent to 60 percent -100 mesh.
    Type: Grant
    Filed: May 23, 1986
    Date of Patent: December 1, 1987
    Inventor: Robert A. Rucker