Patents by Inventor Hal G. Smith

Hal G. Smith 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).

  • Treatment of mineral materials
    Patent number: 6821440
    Abstract: A process in which material comprising an aqueous liquid with dispersed particulate solids is pumped as a fluid then allowed to stand and rigidify and the rigidification is improved whilst retaining the pump ability of the material by combining polymeric particles with the material during or prior to pumping the material, wherein the polymeric particles comprise water soluble polymer which has an intrinsic viscosity of at least 3 dl/g. The process of the invention more effectively minimises the area taken up by a stack of the material of given volume whilst maintaining the pumpability of the material. This invention is particularly suited to material that comprises red mud from the Bayer alumina process.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: November 23, 2004
    Assignee: Ciba Specialty Chemicals Watertreatments Limited
    Inventors: Michael Gerard Gallagher, Hal G. Smith, Stephen Adkins, Anne Frances Hooley, Brian Dymond
  • Treatment of mineral materials
    Publication number: 20030010714
    Abstract: A process in which material comprising an aqueous liquid with dispersed particulate solids is pumped as a fluid then allowed to stand and rigidify and the rigidification is improved whilst retaining the pumpability of the material by combining polymeric particles with the material during or prior to pumping the material, wherein the polymeric particles comprise water soluble polymer which has an intrinsic viscosity of at least 3 dl/g. The process of the invention more effectively minimises the area taken up by a stack of the material of given volume whilst maintaining the pumpability of the material. This invention is particularly suited to material that comprises red mud from the Bayer alumina process.
    Type: Application
    Filed: May 29, 2001
    Publication date: January 16, 2003
    Inventors: Michael Gerard Gallagher, Hal G. Smith, Steven Adkins, Anne Frances Hooley, Brian Dymond