Patents by Inventor Mohammad H. Ali

Mohammad H. Ali has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of reshaping a gypsum board core and products made by same
    Patent number: 5198052
    Abstract: A method for making gypsum wall board in which during the production of the board pressure is applied to a portion or all of the board surface to reshape, compress and densify the gypsum core to change the shape or contour the face surface of the gypsum board. The pressure must be applied in a systematic fashion to avoid creating lateral shifting or shear stresses in the gypsum core or between the core and paper surface to avoid destroying the paper to gypsum core band. The method can be used to product a cross taper at the cut ends of the board, to produce a decoratively shaped board surface and to densify the entire board core for special gypsum board applications.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: March 30, 1993
    Assignee: Domtar, Inc.
    Inventor: Mohammad H. Ali
  • Fire resistant gypsum board . . . anhydrite
    Patent number: 4647486
    Abstract: Increased fire resistant gypsum board core formulations and plaster fireproofing formulations are provided by incorporating calcium sulfate anhydrite into the formulations. Particularly fire resistant effects are achieved with a fibrous form of calcium sulfate anhydrite, and with blends of calcium sulfate anhydrite II in particulate or fibrous form. Optionally, the formulations may contain either small amounts of textile glass fiber, wollastonite or vermiculite.
    Type: Grant
    Filed: June 11, 1985
    Date of Patent: March 3, 1987
    Assignee: United States Gypsum Company
    Inventor: Mohammad H. Ali
  • Fire resistant gypsum board containing mineral wool fibers and method
    Patent number: 4557973
    Abstract: Blown mineral wool fibers are introduced into slurries (such as gypsum board core formulations and steel column fireproofing plaster formulations) by first blending and coating the blown mineral wool with a powdered calcium sulfate to produce a light, open nodulated effect. When mixed into aqueous calcined gypsum slurries, the nodules open up, thoroughly dispersing the mineral wool--calcium sulfate blend in the aqueous slurry and contributing fire resistant properties to the set gypsum product.
    Type: Grant
    Filed: December 28, 1983
    Date of Patent: December 10, 1985
    Assignee: United States Gypsum Company
    Inventor: Mohammad H. Ali
  • Method of manufacturing flame and abuse resistant fiber panel and products resulting
    Patent number: 4376674
    Abstract: A method of manufacturing flame and abuse resistant fiber panels by treating the surface of water-laid fiber mats with an aqeuous slurry of sodium silicate and calicum carbonate and drying the mats is disclosed. The slurry is applied to the wet mat after wet pressing and before drying while the mat still contains considerable moisture content. The resulting products present a hard, abuse resistant, flame resistant and water resistant surface.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: March 15, 1983
    Assignee: United States Gypsum Company
    Inventor: Mohammad H. Ali