Patents by Inventor Roy S. Hodgson

Roy S. Hodgson 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).

  • Wax-based emulsions and their use in gypsum products
    Patent number: 5695553
    Abstract: A composition suitable for use in making water-resistant gypsum products is provided. The composition is an aqueous emulsion comprising water, a paraffinic hydrocarbon wax, a Montan wax, an alkali metal or ammonium hydroxide in an amount sufficient to at least partially saponify the Montan wax, an emulsifier and a dispersant.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: December 9, 1997
    Assignee: Conoco Inc.
    Inventors: Thomas C. Claret, Wesley E. Church, Roy S. Hodgson