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:
Mar. 10, 2020
Filed:
Nov. 17, 2015
Applicant:
Saint-gobain Placo, Suresnes, FR;
Inventors:
Assignee:
SAINT-GOBAIN PLACO, Suresnes, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 28/14 (2006.01); C04B 111/28 (2006.01); C04B 111/34 (2006.01);
U.S. Cl.
CPC ...
C04B 28/14 (2013.01); C04B 2111/28 (2013.01); C04B 2111/34 (2013.01); Y02W 30/92 (2015.05);
Abstract
The present invention provides a calcium sulphate-based product (e.g. a wall board) comprising gypsum, a pozzolan source such as a clay additive, rice husk ash or diatomaceous earth and a metal salt additive. The product may be produced by drying an aqueous slurry comprising calcined gypsum, the pozzolan source and the metal salt additive. The clay additive may be a kaolinitic clay. The metal salt additive may be a magnesium salt e.g. magnesium nitrate, magnesium chloride or magnesium hydroxide.