US Patent Issued to United States Gypsum on May 6 for "Gypsum cement compositions with aggregate stabilizers and methods for forming floor underlayment" (Oklahoma, Illinois Inventors)

ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,485, issued on May 6, was assigned to United States Gypsum Co. (Chicago).

"Gypsum cement compositions with aggregate stabilizers and methods for forming floor underlayment" was invented by Karl Glenn Niessner (Mundelein, Ill.), Dennis Mark Lettkeman (Broken Arrow, Okla.), John Wesley Wilson (Fairview, Okla.) and William Kelly Bedwell (Okeene, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure provides gypsum cement compositions which comprise an aggregate stabilizing mixture containing a combination of a polysaccharide gum and a polyacrylamide-gelatin blend, and methods for making and using these compositions, including pourable/pu...