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:
Jun. 30, 2026
Filed:
Apr. 06, 2022
Applicant:
Knauf Gips KG, Iphofen, DE;
Inventors:
Mark Hemphill, Hawthron Woods, IL (US);
Qinghua Li, Rolling Meadows, IL (US);
Assignee:
KNAUF GIPS KG, Iphofen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C04B 11/00 (2006.01); C04B 103/10 (2006.01); C04B 103/20 (2006.01); C04B 103/40 (2006.01); C04B 111/00 (2006.01);
U.S. Cl.
CPC ...
C04B 11/00 (2013.01); C04B 2103/10 (2013.01); C04B 2103/20 (2013.01); C04B 2103/408 (2013.01); C04B 2111/0062 (2013.01);
Abstract
A high temperature sag resistant lightweight wallboard. The addition of a small amount of urea (about 0.1%) significantly improves the high-temperature sag resistance on Type X gypsum wallboards. These gypsum wallboards may have a board weight of less than 2100 lbs/msf when cast to have an overall 5.8 inch thickness, and may include glass fibers and/or mineral wool. Also, methods of making the gypsum wallboard and a wall system for employing the gypsum wallboard.