ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,165, issued on Sept. 8, was assigned to Knauf Gips KG (Iphofen, Germany).
"Foamed liquefiers in gypsum boards" was invented by Stergios Karakoussis (Laubach, Germany), Georgi Paraskov (Neustadt an der Aisch, Germany), Alexander Hartmann (Kleinlangheim, Germany) and Anton Peter (Wuerzburg, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention concerns a method for producing gypsum boards, wherein a liquefier for the gypsum slurry is foamed with gas to provide a foam having a water content of less than 85 wt.-%, then incorporated into a gypsum/water mixture and the mixture thus obtained is applied on a two dimensional substrate. The inc...