Patents by Inventor Lambert J. Metz

Lambert J. Metz 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).

  • Lightweight wallboard compositions containing natural polymers
    Patent number: 6783587
    Abstract: Compositions useful for the preparation of lightweight, high strength wallboards, and methods of making same are disclosed. The composition includes a slurry of calcium sulfate hemihydrate (stucco), water, starch, and a foam. The foam acts to provide large bubbles within the core slurry, thereby lightening the weight of the wallboard. The composition and method provide wallboards having lighter weights compared to standard wallboard, increased core strength, and increased paper-to-core bonding.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: August 31, 2004
    Assignee: National Gypsum Properties, LLC
    Inventors: Gopalakrishnan Sethuraman, Elisha Stav, Lambert J. Metz
  • LIGHTWEIGHT WALLBOARD COMPOSITIONS CONTAINING EXCESS STARCH
    Publication number: 20040045481
    Abstract: Compositions useful for the preparation of lightweight, high strength wallboards, and methods of making same are disclosed. The composition includes a slurry of calcium sulfate hemihydrate (stucco), water, starch, and a foam. The foam acts to provide large bubbles within the core slurry, thereby lightening the weight of the wallboard. The composition and method provide wallboards having lighter weights compared to standard wallboard, increased core strength, and increased paper-to-core bonding.
    Type: Application
    Filed: September 11, 2002
    Publication date: March 11, 2004
    Applicant: National Gypsum Properties, LLC
    Inventors: Gopalakrishnan Sethuraman, Elisha Stav, Lambert J. Metz
  • 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