Patents by Inventor C. Eric Westbrook

C. Eric Westbrook 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).

  • Tridymite-based processing for high purity quartz
    Patent number: 6277349
    Abstract: A process of purifying crystalline quartz to remove impurities within the lattice structure comprising the steps of heating the quartz to the tridymite polymorphic form and evaporatively reacting the heated quartz with an aqueous acid solution reactive with the impurities in the quartz to form water soluble metal salts. The residue of the evaporative reaction is washed with water to dissolve the metal salts leaving purified crystalline quartz. The disclosure also includes the product of the process.
    Type: Grant
    Filed: November 14, 1998
    Date of Patent: August 21, 2001
    Inventors: C. Eric Westbrook, Anna Michelle Benson
  • 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