Patents by Inventor Christopher W. George

Christopher W. George 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).

  • Process for the production of dicalcium phosphate
    Patent number: 4524054
    Abstract: A process for the recovery of phosphate values from a phosphate ore, wherein the ore is leached with a mixture comprising water, sulphur dioxide and an organic carbonyl compound; the leach liquor containing dissolved phosphate values and calcium hydroxysulphonate is separated from any gangue and other insoluble material; and the leach liquor is treated to recover therefrom a phosphate-rich product and at least part of the sulphur dioxide and the carbonyl compound; characterized in that the leaching is carried out under conditions such that substantially no calcium hydroxysulphonate is precipitated at the leaching stage.
    Type: Grant
    Filed: January 5, 1984
    Date of Patent: June 18, 1985
    Assignees: Commonwealth Scientific and Industrial Research Organization, Queensland Phosphate Limited
    Inventors: Christopher W. George, Hari N. Sinha, Mary R. Vujcich, Graham S. Walker