Patents Assigned to Charles W. Helzer
  • Magnesium phosphate fluid fertilizer
    Patent number: 4457773
    Abstract: A 0-21-0-9 Mg liquid mixed fertilizer is prepared by adding powdered magnesium hydroxide and an equal amount of water to a dilute solution of phosphoric acid in a plurality of addition steps. A dispersing powder and an emulsifying agent are then added to increase the storage life of the fluidized fertilizer. In a second example dilute sulfuric acid is added to the mixture along with citric acid.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: July 3, 1984
    Assignee: Charles W. Helzer
    Inventor: George S. Sley