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. 13, 2017
Filed:
Sep. 16, 2013
Maria-andrée Mathieu, Bromont, CA;
Benoit Dubé, Granby, CA;
Frédéric Potvin, Granby, CA;
Jacques L'heureux, St-Anne de Larochelle, CA;
Jean-francois Brassard, Bromont, CA;
Patrick Guertin, St-Alphonse de Granby, CA;
Maria-Andrée Mathieu, Bromont, CA;
Benoit Dubé, Granby, CA;
Frédéric Potvin, Granby, CA;
Jacques L'Heureux, St-Anne de Larochelle, CA;
Jean-Francois Brassard, Bromont, CA;
Patrick Guertin, St-Alphonse de Granby, CA;
National Gypsum Properties, LLC, Charlotte, NC (US);
Abstract
A process for the formation of highly durable cementitious board using lightweight aggregate is disclosed. The process comprises pouring a core mix onto a conveyor, wherein the core mix is comprised of one or more lightweight aggregate filler in the amount of 0.5 to 5 weight percent of the core mix, one or more binders in the amount of 35 to 75 weight percent of the core mix, rheological admixture in the amount of about 0.5 to 5 weight percent of the core mix, surfactant in the amount of 0 to 0.1 weight percent of the core mix, one or more normal weight aggregate filler in the amount of 5 to 50 weight percent of the core mix, and water in the amount of 5 to 20 weight percent of the core mix. The process further comprises passing the core mix under a screed roller to flatten the core mix to produce an extruding board with a desired thickness.