Patents by Inventor Robert William Kershaw

Robert William Kershaw 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).

  • Amine resin and process
    Patent number: 4007142
    Abstract: As new compositions, retiporous amine resin granules of at least 10% pore volume, the pores having a minimum average diameter of about 0.1 micron. A process of preparing the granules from a dispersion of a hardenable amine syrup and their use in paints, polymer and paper as texturing and matting agents are also disclosed.
    Type: Grant
    Filed: June 9, 1976
    Date of Patent: February 8, 1977
    Assignee: Balm Paints Limited
    Inventors: Barry John Clarke, Robert William Kershaw, Frederick John Lubbeck
  • Vesiculated polymer granules
    Patent number: 3933579
    Abstract: The invention relates to vesiculated polymer granules having a plurality of discrete internal vesicles whose walls are provided by said polymer, said granules having a mean diameter of 1-500 micron, the vesules having a maximum diameter of 20 micron and containing particulate solids at a concentration not exceeding 60% of the vesicle volume.
    Type: Grant
    Filed: August 4, 1971
    Date of Patent: January 20, 1976
    Assignee: Dulux Australia Limited
    Inventors: Robert William Kershaw, Frederick John Lubbock, Livia Polgar