Patents by Inventor James A. Robson

James A. Robson 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).

  • Particle separation
    Patent number: 4756823
    Abstract: The present invention provides a blended preparation for the separation especially of coal particles from the tailings which are contained in the fines produced in coal mining. The blended preparation is used instead of or in addition to the conventional froth oil. The blended preparation comprises froth oil, flocculating agent, emulsifying agent, water and optionally, anti-freeze. The use of the preparation results in faster separation and saving in flocculating agent.
    Type: Grant
    Filed: March 5, 1986
    Date of Patent: July 12, 1988
    Assignee: Carbo Fleet Chemical Co., Ltd.
    Inventors: Derek O'Neill, James A. Robson, Leonard K. Pugh