Patents by Inventor Brian R. Angel

Brian R. Angel 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).

  • Methods of producing kaolin pigments
    Patent number: 4299807
    Abstract: A method for producing kaolin pigments of improved coated brightness and opacity is provided in which kaolin is degritted, heated to the level of substantially minimum brightness and then leached. The kaolin may be comminuted before treatment, after heating or after leaching to control particle size distribution.
    Type: Grant
    Filed: June 3, 1980
    Date of Patent: November 10, 1981
    Assignee: Yara Engineering Corporation
    Inventors: Brian R. Angel, Robert W. Bradshaw