US 11,884,599 B2
Gypsum wallboard slurry and method for making the same
Eli Stav, Charlotte, NC (US); Gopalakrisnan Sethuraman, Charlotte, NC (US); Ma-Ikay Miatudila, Monroe, NC (US); Karen Fey, Indian Trail, NC (US); and Joseph J. Bailey, Charlotte, NC (US)
Assigned to Gold Bond Building Products, LLC, Charlotte, NC (US)
Filed by Gold Bond Building Products, LLC, Charlotte, NC (US)
Filed on Mar. 11, 2022, as Appl. No. 17/692,322.
Application 17/692,322 is a continuation of application No. 16/850,467, filed on Apr. 16, 2020, granted, now 11,274,067.
Application 16/850,467 is a continuation of application No. 14/944,539, filed on Nov. 18, 2015, granted, now 10,662,119, issued on May 26, 2020.
Application 14/944,539 is a continuation of application No. 13/403,861, filed on Feb. 23, 2012, granted, now 9,221,719, issued on Dec. 29, 2015.
Claims priority of provisional application 61/445,977, filed on Feb. 23, 2011.
Prior Publication US 2022/0194864 A1, Jun. 23, 2022
Int. Cl. C04B 38/10 (2006.01); C04B 28/14 (2006.01); C04B 111/00 (2006.01)
CPC C04B 38/10 (2013.01) [C04B 28/14 (2013.01); C04B 2111/0062 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A gypsum board comprising:
a gypsum layer formed from a gypsum slurry having a composition comprising:
calcined gypsum;
water;
an aqueous foam; and
a first thickening agent comprising a polyacrylamide;
wherein the calcined gypsum is present in the gypsum slurry in an amount of from 548 to 1180 lbs/msf, and
wherein the gypsum board has a thickness of ½″.