Patents by Inventor Hugh Robin Falcon-Steward

Hugh Robin Falcon-Steward 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).

  • Production of aqueous calcium carbonate suspensions
    Patent number: 3989195
    Abstract: A method of producing an easily pumpable aqueous suspension of a natural calcium carbonate material containing at least 60% by weight of particles smaller than 2 microns equivalent spherical diameter comprises forming an aqueous suspension of said natural calcium carbonate material and a minor amount of a compound which contains calcium ions or carbonate ions and has a solubility in water of at least 0.05 g per 100 ml of water at 25.degree. C; and thereafter deflocculating the natural calcium carbonate material in said aqueous suspension with a dispersing agent.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: November 2, 1976
    Assignee: English Clays Lovering Pochin & Company Limited
    Inventor: Hugh Robin Falcon-Steward