Patents by Inventor Patrick J. Mudd

Patrick J. Mudd 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).

  • Cementitious gypsum-containing binders and compositions and materials made therefrom
    Patent number: 5858083
    Abstract: Cementitious binders include calcium sulfate beta-hemihydrate, a cement component comprising Portland cement, and either silica fume or rice-husk ash. The silica fume or rice-husk ash component is at least about 92 wt % amorphous silica and has an alumina content of about 0.6 wt % or less.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: January 12, 1999
    Assignee: National Gypsum Company
    Inventors: Elisha Stav, Edward A. Burkard, Ronald S. Finkelstein, Daniel A. Winkowski, Lambert J. Metz, Patrick J. Mudd
  • Asbestos-free drywall joint compound utilizing sepiolite clay as asbestos substitute
    Patent number: 4370167
    Abstract: Drywall joint compounds in which asbestos fiber has been omitted and the physical characteristics which have heretofore depended on the presence of asbestos fiber or on attapulgite clay have been obtained by the inclusion of finely powdered sepiolite clay.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: January 25, 1983
    Assignee: National Gypsum Company
    Inventor: Patrick J. Mudd