Patents by Inventor Greig Freeman

Greig Freeman 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).

  • Beneficiation of coal
    Patent number: 8591607
    Abstract: A process for improving mined coal includes comminuting the coal to a particle size at which individual macerals are available. Reactive macerals are extracted from the comminuted coal as froth from the top of a deep-column flotation cell. The extracted macerals are then de-watered.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: November 26, 2013
    Assignee: Global Coal Solutions Pty Ltd
    Inventors: Grant Fleming, Greig Freeman
  • BENEFICIATION OF COAL
    Publication number: 20100287828
    Abstract: This invention concerns the beneficiation of coal, in particular a process for improving mined coal. The invention is a commercial scale process for improving coal, comprising the steps of: Comminuting coal to a particle size at which individual Macerals are available. Extracting reactive Macerals from the comminuted coal as froth from the top of a deep-column flotation cell. And, dewatering the extracted Macerals. In another aspect the invention concerns a commercial scale processing plant for mined coal.
    Type: Application
    Filed: August 18, 2008
    Publication date: November 18, 2010
    Applicant: Global Coal Solutions Pty Ltd
    Inventors: Grant Flemming, Greig Freeman