Patents by Inventor Henry T. A. Bowman

Henry T. A. Bowman 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).

  • Processing of calcium carbonate minerals
    Patent number: 4251351
    Abstract: A stable, pumpable suspension of a calcium carbonate mineral is prepared by a method which includes the step of removing abrasive particles from a deflocculated, concentrated aqueous suspension of the calcium carbonate mineral by centrifuging the suspension at a solids content of at least 65% by weight under conditions such that the quantity of particles in said suspension having an equivalent spherical diameter larger than 10 .mu.m is reduced.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: February 17, 1981
    Assignee: English Clays Lovering Pochin & Co., Ltd.
    Inventor: Henry T. A. Bowman