Patents by Inventor Philip J. A. Ritchie

Philip J. A. Ritchie 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).

  • Vesiculated polyester granules
    Patent number: 6777454
    Abstract: This invention relates to a process of preparing vesiculated granules of crosslinked carboxylated polyester resin utilising a particular class of non-alkylphenolethoxylate surfactant.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: August 17, 2004
    Assignee: Orica Australia Pty Ltd.
    Inventors: Philip J. A. Ritchie, Algirdas K. Serelis
  • Vesiculated polyester granules
    Publication number: 20030040557
    Abstract: This invention relates to a process of preparing vesiculated granules of crosslinked carboxylated polyester resin utilising a particular class of non-alkylphenolethoxylate surfactant.
    Type: Application
    Filed: June 28, 2002
    Publication date: February 27, 2003
    Inventors: Philip J. A. Ritchie, Algirdas K. Serelis
  • Process of preparing vesiculated polyester granules
    Patent number: 4483945
    Abstract: A process of preparing aqueous slurries of vesiculated granules of crosslinked polyester resin wherein the granules have a maximum shrinkage on drying of 5% of the granule diameter.The formation of aggregates of granules in the large scale production of granules using a metal oxide, hydroxide or weak acid salt as base can be overcome by using a surfactant which comprises a species ##STR1## wherein a=5-12, X is an anion of pK.sub.1 less than 2 and R is an alkylene oxide chain composed of units selected from ethylene, propylene and butylene oxides. When alkylene oxide other than ethylene oxide is present in the chain, such alkylene oxide must not provide more than two units per chain and the chain must additionally comprise at least three ethylene oxide units.The granules prepared by the process are useful as matting and opacifying agents in, for example, coating compositions.
    Type: Grant
    Filed: August 10, 1983
    Date of Patent: November 20, 1984
    Assignee: Dulux Australia Ltd.
    Inventors: Michael P. Beresford, Susan E. Potter, Philip J. A. Ritchie