Patents by Inventor John I. Westerman

John I. Westerman 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 composition with styrene butadiene latex additive
    Patent number: 6755907
    Abstract: Gypsum wallboard made lighter and less dense, without sacrificing strength, by adding to the gypsum slurry used in making the board a styrene butadiene polymer latex substantially stable against divalent ions in which the styrene butadiene polymer latex substantially stable against divalent ions in which the styrene butadiene polymer includes at least 0.25 wt. % of an ionic monomer.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: June 29, 2004
    Assignee: Omnova Solutions Inc.
    Inventors: John I. Westerman, Paul A. Hardy, Roman Zorska