The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2025
Filed:
Sep. 20, 2022
Applicant:
Knauf Gips KG, Iphofen, DE;
Inventors:
Qinghua Li, Rolling Meadows, IL (US);
Mark Hemphill, Hawthron Woods, IL (US);
Assignee:
KNAUF GIPS KG, Iphofen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C04B 11/28 (2006.01); C01B 33/42 (2006.01); C04B 14/20 (2006.01); C04B 28/14 (2006.01); C04B 111/00 (2006.01); C04B 111/40 (2006.01);
U.S. Cl.
CPC ...
C04B 11/28 (2013.01); C04B 2111/0062 (2013.01); C04B 2111/40 (2013.01);
Abstract
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 vermiculite that has not been ammonium-exchanged. The disclosure further relates to methods for producing the gypsum panel and constructing building assemblies with the gypsum panels, including walls and ceilings.