Patents Assigned to EAGLE MATERIALS IP LLC
  • Area separation firewall system
    Patent number: 11649628
    Abstract: A firewall includes wallboard arranged in three or more layers. The wallboard may include gypsum, fiber glass, and/or vermiculite. The firewall may be reinforced with fasteners, such as laminating screws, affixing the layers of wallboard to one another. The firewall may be incorporated into an area separation wall such that the area separation wall satisfies the standards of ASTM E119 or UL 263.
    Type: Grant
    Filed: February 3, 2022
    Date of Patent: May 16, 2023
    Assignee: EAGLE MATERIALS IP LLC
    Inventor: Robert Ek