Patents by Inventor John R. Prest, Jr.

John R. Prest, Jr. 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).

  • High water solubility potassium sulfate and method of producing same
    Patent number: 5298050
    Abstract: Improved potassium sulfate salt products in both solid particulate and liquid form are provided which exhibit enhanced salt solubility in water. The products include potassium sulfate, in combination with a surfactant and mixed together in water. The aqueous mixture is heated to a maximum reaction temperature in the range of about 100.degree.-210.degree. F., and will retain enhanced water solubility in either a heated or cooled condition. In preferred forms, potassium sulfate may be treated with at least 0.1% by weight of disulfonate surfactant and heated in water to 100.degree.-140.degree. F. to give K.sub.2 SO.sub.4 solutions of at least 8% by weight solubility taken as K.sub.2 O.
    Type: Grant
    Filed: October 9, 1992
    Date of Patent: March 29, 1994
    Assignee: Great Salt Lake Minerals Corporation
    Inventors: J. C. McLaughlin, Danton S. Nason, John R. Prest, Jr.