US Patent Issued to KNAUF GIPS on Oct. 21 for "Gypsum panel containing ammonium-exchanged vermiculite and methods" (Illinois Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,328, issued on Oct. 21, was assigned to KNAUF GIPS KG (Iphofen, Germany).

"Gypsum panel containing ammonium-exchanged vermiculite and methods" was invented by Qinghua Li (Rolling Meadows, Ill.) and Mark Hemphill (Hawthron Woods, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure provides products useful as construction materials and containing set gypsum and ammonium-exchanged vermiculite, including a gypsum panel having a gypsum core comprising set gypsum and ammonium-exchanged vermiculite and characterized by decreased heat shrinkage and increased resistance to fire damage in comparison to the gypsum panel that comprises vermiculi...