Patents by Inventor Frederick M. Boehnert

Frederick M. Boehnert 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).

  • Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it
    Patent number: 6632550
    Abstract: The invention provides a set gypsum-containing product having increased resistance to permanent deformation and a method for preparing it comprising forming a mixture of a calcium sulfate material, water, and an appropriate amount of one or more enhancing materials chosen from condensed phosphoric acids, each of which comprises 2 or more phosphoric acid units; and salts or ions of condensed phosphates, each of which comprises 2 or more phosphate units. The mixture is then maintained under conditions sufficient for the calcium sulfate material to form a set gypsum material.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: October 14, 2003
    Assignee: United States Gypsum Company
    Inventors: Qiang Yu, Steven W. Sucech, Brent E. Groza, Raymond J. Mlinac, Frederick T. Jones, Frederick M. Boehnert