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:
Apr. 27, 2021
Filed:
Oct. 16, 2018
Applicant:
Certainteed Gypsum, Inc., Malvern, PA (US);
Inventor:
Robin Fisher, Loughborough, GB;
Assignee:
CertainTeed Gypsum, Inc., Malvern, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B 13/00 (2006.01); C04B 11/00 (2006.01); C04B 28/14 (2006.01); C04B 103/56 (2006.01); C04B 103/63 (2006.01); C04B 111/00 (2006.01); C04B 111/28 (2006.01);
U.S. Cl.
CPC ...
C04B 11/00 (2013.01); B32B 13/00 (2013.01); C04B 28/14 (2013.01); B32B 2607/00 (2013.01); C04B 2103/58 (2013.01); C04B 2103/63 (2013.01); C04B 2111/0062 (2013.01); C04B 2111/28 (2013.01);
Abstract
This invention relates to improved high temperature resistant calcium sulphate-based products e.g. gypsum wallboard products and, in particular, to products having reduced shrinkage at high temperatures. The invention provides calcium sulphate-based product comprising gypsum and a shrinkage resistance additive. The shrinkage resistance additive is melamine polyphosphate or melamine pyrophosphate.