Patents by Inventor Kenneth L. Brenis

Kenneth L. Brenis 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 bulk density rigid poly(vinyl chloride) resin powder composition and preparation thereof
    Patent number: 4239679
    Abstract: Completely free flow characteristics are provided to a densified rigid poly(vinyl chloride) resin powder composition as prepared in a high shear mixer at an elevated temperature, by withholding at least a portion of the total filler requirement from the composition during the initial mixing cycle, and thereafter adding the remainder of the filler requirement to the composition after it has been cooled to a temperature of 175.degree. F. or less. The total filler requirement of the composition may likewise be added after cooling the blend to 175.degree. F. or less. The resulting rigid resin powder composition exhibits the optimum free flow characteristics required for satisfactory processing in multi-screw extruders.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: December 16, 1980
    Assignee: Diamond Shamrock Corporation
    Inventors: James A. Rolls, Kenneth L. Brenis