Patents by Inventor Mark Pierce Clarkson

Mark Pierce Clarkson 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 preparing calcium thiosulfate solution
    Patent number: 6984368
    Abstract: An efficient process to produce calcium thiosulfate (CaS2O3) from lime, sulfur and oxygen is described. By selecting appropriate process conditions such as mole ratios of lime to sulfur, temperature and pressure of the reaction process and the oxidation conditions, including rate and duration, the concentration of byproducts in the resulting suspension can be reduced to about 2% by weight or less. The solid particulate dispersion in the suspension tends to form a slimy solid suspension that is hard to filter if not treated properly. The suspension then can be acidified and treated with a flocculent. This agglomerates the solids into a floc that filters with ease. The resulting calcium thiosulfate is a clear liquid with concentrations achievable up to 29%.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: January 10, 2006
    Assignee: Tessenderlo Kerley, Inc.
    Inventors: Michael Massoud Hajjatie, Harry Charles Kominski, III, Mark Daniel Aspengren, Mark Pierce Clarkson, Constance Lynn Frank Lockhart
  • Process and apparatus for preparing calcium thiosulfate solution
    Publication number: 20040247518
    Abstract: An efficient process to produce calcium thiosulfate (CaS2O3) from lime, sulfur and oxygen is described. By selecting appropriate process conditions such as mole ratios of lime to sulfur, temperature and pressure of the reaction process and the oxidation conditions, including rate and duration, the concentration of byproducts in the resulting suspension can be reduced to about 2% by weight or less. The solid particulate dispersion in the suspension tends to form a slimy solid suspension that is hard to filter if not treated properly. The suspension then can be acidified and treated with a flocculent. This agglomerates the solids into a floc that filters with ease. The resulting calcium thiosulfate is a clear liquid with concentrations achievable up to 29%.
    Type: Application
    Filed: June 9, 2003
    Publication date: December 9, 2004
    Applicant: Tessenderlo Kerley, Inc.
    Inventors: Michael Massoud Hajjatie, Harry Charles Kominski, Mark Daniel Aspengren, Mark Pierce Clarkson, Constance Lynn Frank Lockhart