Patents Assigned to Franklin Industries, Inc.
  • Method and product of calcium sulfate dihydrate as filler in aqueous polymer dispersions
    Patent number: 5340392
    Abstract: This invention relates to a method and composition for the incorporation of gypsum as a filler material in aqueous polymer dispersions by means of the addition of a detergent selected from the group consisting of ammonium lauryl sulfate, sodium lauryl sulfate, ammonium laureth sulfate, and sodium laureth sulfate.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: August 23, 1994
    Assignee: Franklin Industries, Inc.
    Inventors: C. Eric Westbrook, Nelson Severinghaus
  • Method of bleaching limestone
    Patent number: 4824653
    Abstract: A method for improving the brightness of limestone utilizing a chelating agent and a bleaching agent in a limestone slurry in which the pH of the slurry is normally between 9.0 and 9.6.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: April 25, 1989
    Assignee: Franklin Industries, Inc.
    Inventors: Nelson Severinghaus, Jr., Gregory R. Sharp
  • Method of tinting a mineral filler
    Patent number: 4661164
    Abstract: A method of increasing the whiteness of a mineral filler, such as limestone, having a natural yellow tint, including the grinding of the limestone to a pulverulent size and introducing into the limestone, preferably while it is being ground, a blue pigment in an amount sufficient to optically transform the natural yellow tint to a predetermined degree of whiteness.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: April 28, 1987
    Assignee: Franklin Industries, Inc.
    Inventor: Nelson Severinghaus, Jr.
  • Stove door construction
    Patent number: 4324223
    Abstract: A convertible door for wood stoves and the like having a central opening therein. A pair of interchangeable panels are provided which are dimensioned to substantially cover said opening; one of said panels being opaque, the other being transparent. Each of the panels is detachably mountable on the rear surface of the door to thereby provide selectively opaque or transparent covers for said opening.
    Type: Grant
    Filed: December 30, 1980
    Date of Patent: April 13, 1982
    Assignee: Franklin Industries, Inc.
    Inventor: Larry A. Schwartz