Patents by Inventor Charles Desmond Payton

Charles Desmond Payton 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).

  • Grinding method for inorganic particulate material
    Patent number: 7938346
    Abstract: A method of preparing a steep particle size inorganic particulate material includes grinding an aqueous suspension of an inorganic particulate material having a solids content of less than 35% and including a sub-effective amount of a dispersant for the inorganic particulate material. The method may further include dewatering the aqueous suspension to a solids content of at least 50% and dispersing the dewatered aqueous suspension by adding an additional amount of dispersant, and wherein, after grinding, the inorganic particulate material has a steepness factor above 35.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: May 10, 2011
    Assignee: Imerys Minerals Limited
    Inventors: John Claude Husband, Nigel V. Jarvis, Charles Desmond Payton, David Robert Skuse
  • GRINDING METHOD FOR INORGANIC PARTICULATE MATERIAL
    Publication number: 20100219269
    Abstract: A method of preparing a steep particle size inorganic particulate material includes grinding an aqueous suspension of an inorganic particulate material having a solids content of less than 35% and including a sub-effective amount of a dispersant for the inorganic particulate material. The method may further include dewatering the aqueous suspension to a solids content of at least 50% and dispersing the dewatered aqueous suspension by adding an additional amount of dispersant, and wherein, after grinding, the inorganic particulate material has a steepness factor above 35.
    Type: Application
    Filed: March 22, 2010
    Publication date: September 2, 2010
    Inventors: John Claude Husband, Nigel V. Jarvis, Charles Desmond Payton, David Robert Skuse