Patents by Inventor Reginald Thompson

Reginald Thompson 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).

  • Hollow borosilicate microspheres and method of making
    Patent number: 5534348
    Abstract: The present invention provides hollow borosilicate microspheres having a mean particle size between 15 and 20 microns, and a true density below 0.25 g/cc. The invention also provides a method for making such microspheres comprising spray drying a solution of sodium silicate and sodium borate in a spray tower to form a precursor, milling the precursor, and heating the crushed precursor to a temperature in excess of 600.degree. F. to form hollow borosilicate microspheres.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: July 9, 1996
    Assignee: PQ Corporation
    Inventors: J. Stanley Miller, Reginald Thompson