Patents Assigned to Domtar Gypsum Inc.
  • Gypsum dissolution system
    Patent number: 4820053
    Abstract: A continuous process and apparatus for preparing a gypsum slurry of water and finely divided high purity gypsum for use in an irrigation system wherein the gypsum and water are mixed by vigorous agitation in a tank or the like. Means are provided to create a quiescent zone in the tank that extends from at least the mid-section of the tank to the upper region thereof for discharge of the slurry so that agitation of the slurry mix within the tank does not interfere with an even discharge of the slurry from the tank.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: April 11, 1989
    Assignee: Domtar Gypsum Inc.
    Inventor: Jerry B. Rivers
  • Gypsum dissolution system
    Patent number: 4812045
    Abstract: A continuous precess and apparatus for preparing a gypsum slurry of water and finely divided high purity gypsum for use in an irrigation system wherein the gypsum and water are mixed by vigorous agitation in a tank or the like. Means are provided to create a quiescent zone in the tank that extends from at least the mid-section of the tank to the upper region thereof for discharge of the slurry so that agitation of the slurry mix within the tank does not interfere with an even discharge of the slurry from the tank.
    Type: Grant
    Filed: August 20, 1987
    Date of Patent: March 14, 1989
    Assignee: Domtar Gypsum Inc.
    Inventor: Jerry B. Rivers