Patents by Inventor Keith L. BRISTOW

Keith L. BRISTOW 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).

  • Sprayable polymer membrane for agriculture
    Patent number: 11877539
    Abstract: A process for preparing a polymeric membrane for soil materials used in crop production comprising providing an aqueous dispersion of polyurethane and spraying the aqueous dispersion onto soil materials to be used in crop production to form a polymeric membrane.
    Type: Grant
    Filed: March 4, 2022
    Date of Patent: January 23, 2024
    Assignee: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
    Inventors: Raju Adhikari, Philip Casey, Keith L. Bristow, George Freischmidt, John Hornbuckle
  • SPRAYABLE POLYMER MEMBRANE FOR AGRICULTURE
    Publication number: 20220183238
    Abstract: A process for preparing a polymeric membrane for soil materials used in crop production comprising providing an aqueous dispersion of polyurethane and spraying the aqueous dispersion onto soil materials to be used in crop production to form a polymeric membrane.
    Type: Application
    Filed: March 4, 2022
    Publication date: June 16, 2022
    Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
    Inventors: Raju ADHIKARI, Philip CASEY, Keith L. BRISTOW, George FREISCHMIDT, John HORNBUCKLE
  • Sprayable polymer membrane for agriculture
    Patent number: 11266083
    Abstract: A process for preparing a polymeric membrane for soil materials used in crop production comprising providing an aqueous dispersion of polyurethane and spraying the aqueous dispersion onto soil materials to be used in crop production to form a polymeric membrane.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: March 8, 2022
    Assignee: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
    Inventors: Raju Adhikari, Philip Casey, Keith L. Bristow, George Freischmidt, John Hornbuckle
  • HYDROPHOBIC-HYDROPHILIC SWITCHABLE POLYMERS FOR USE IN AGRICULTURE
    Publication number: 20190055470
    Abstract: A process for regulating the water retention of soil materials used in agriculture involving providing a composition comprising a polymer selected from the group consisting of a urethane, a urethaneurea, a thiocarbamate and mixtures thereof, said polymer comprising hydrophobic and hydrophilic segments; and applying the composition onto soil materials used in agriculture to form a polymer film thereon, wherein the hydrophobic and hydrophilic segments together provide reversible hydrophobic-hydrophilic switching in response to water, such that the film surface switches from a relatively hydrophobic state in dry conditions to a relatively hydrophilic state in response to the presence of water in contact with the film surface.
    Type: Application
    Filed: March 21, 2017
    Publication date: February 21, 2019
    Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
    Inventors: Priscilla JOHNSTON, Raju ADHIKARI, Keith L. BRISTOW
  • SPRAYABLE POLYMER MEMBRANE FOR AGRICULTURE
    Publication number: 20170135292
    Abstract: A process for preparing a polymeric membrane for soil materials used in crop production comprising providing an aqueous dispersion of polyurethane and spraying the aqueous dispersion onto soil materials to be used in crop production to form a polymeric membrane.
    Type: Application
    Filed: June 3, 2015
    Publication date: May 18, 2017
    Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
    Inventors: Raju ADHIKARI, Philip CASEY, Keith L. BRISTOW, George FREISCHMIDT, John HORNBUCKLE