Patents by Inventor George T. Hurst

George T. Hurst 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).

  • Asbestos process
    Patent number: 4591103
    Abstract: A process of recovering asbestos fibre from asbestos-bearing material comprising a first stage of preparing a fibre concentrate by the steps of comminution, classification and spiral concentration and a second stage of liberating and recovering fibre, wherein in the second stage there is a separation by means of a hydrocyclone into a well-opened fraction and a poorly opened fraction, and wherein the asbestos-bearing material is substantially moist throughout the process.
    Type: Grant
    Filed: January 25, 1984
    Date of Patent: May 27, 1986
    Assignees: ICI Australia Limited, Woods Reef Mines Ltd.
    Inventors: John R. Andrews, Philip S. B. Stewart, George T. Hurst
  • Process of separating asbestos fibers and product thereof
    Patent number: 4226672
    Abstract: A process of separating fibres from asbestos-bearing material which process comprises the steps by treating said asbestos-bearing material with a chemical agent capable of reacting with, or adsorbing on, asbestos fibres to form a dispersion, and agglomerating said dispersion. The process gives high yields of novel fibres characterized in that the said fibres provide reinforcement in cementitious compositions.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: October 7, 1980
    Assignee: ICI Australia Limited
    Inventors: Victor J. Absolon, George T. Hurst, John C. Worboys, George H. Barnett, Ross P. Dickson
  • Cementitious composition containing asbestos fibres and prepared using a surfactant
    Patent number: 4190456
    Abstract: Cementitious compositions containing novel asbestos fibres characterized in that the said asbestos fibres are prepared from asbestos-bearing material by a process comprising treating said asbestos-bearing material with a surfactant to form a dispersion and agglomerating said dispersion.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: February 26, 1980
    Assignee: ICI Australia Limited
    Inventors: Victor J. Absolon, George T. Hurst, John C. Worboys, George H. Barnett, Ross P. Dickson