Patents by Inventor Gregory R. Sharp

Gregory R. Sharp 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).

  • Method of bleaching limestone
    Patent number: 4824653
    Abstract: A method for improving the brightness of limestone utilizing a chelating agent and a bleaching agent in a limestone slurry in which the pH of the slurry is normally between 9.0 and 9.6.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: April 25, 1989
    Assignee: Franklin Industries, Inc.
    Inventors: Nelson Severinghaus, Jr., Gregory R. Sharp