Invention Grant
- Patent Title: Composite gypsum board and methods related thereto
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Application No.: US15186212Application Date: 2016-06-17
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Publication No.: US11040513B2Publication Date: 2021-06-22
- Inventor: Alfred C. Li , Weixin D. Song , Yijun Sang , Gregg G. Diefenbacher , Annamaria Vilinska , Brian J. Christ , Fredrick T. Jones , Bradley W. Todd
- Applicant: United States Gypsum Company
- Applicant Address: US IL Chicago
- Assignee: United States Gypsum Company
- Current Assignee: United States Gypsum Company
- Current Assignee Address: US IL Chicago
- Agency: Greer, Burns & Crain, Ltd.
- Agent Philip T. Petti; Pradip Sahu
- Main IPC: C04B28/14
- IPC: C04B28/14 ; B32B7/02 ; B32B13/08 ; B32B13/14 ; B32B37/14 ; B32B13/02 ; B32B13/04 ; C04B11/00 ; C04B24/38 ; E04C2/04 ; C04B22/16 ; C04B111/00 ; C04B111/30 ; B32B37/15

Abstract:
Disclosed is a composite gypsum board comprising a board core and a concentrated layer of substantial thickness (e.g., at least about 0.02 inches). The concentrated layer includes a higher weight percentage of an enhancing additive than the board core. The board core has a thickness greater than the thickness of the concentrated layer and forms the bulk of the board volume. The concentrated layer has a higher density (e.g., at least about 1.1 times greater) than the density of the board core. Also disclosed is a method of preparing a composite gypsum board.
Public/Granted literature
- US20160375656A1 COMPOSITE GYPSUM BOARD AND METHODS RELATED THERETO Public/Granted day:2016-12-29
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