Patents by Inventor Paul A. Holmes

Paul A. Holmes 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).

  • Polymer blends containing polymer of .beta.-hydroxybutyric acid and chlorine or nitrile group containing polymer
    Patent number: 4393167
    Abstract: Polymer blends containing (i) 0.2-95% by weight of a high molecular weight .beta.-hydroxybutyric acid homo- or copolymer and (ii) a polymer containing at least 25% by weight of chlorine or nitrile groups, such as chlorinated polyethylene, polyvinyl chloride, or a high acrylonitrile resin.In small quantities the .beta.-hydroxybutyric acid polymer acts as a processing aid for the chlorine or nitrile containing polymer.In larger quantities the properties of the .beta.-hydroxybutyric acid polymer or the chlorine or nitrile containing polymer are improved.
    Type: Grant
    Filed: November 10, 1981
    Date of Patent: July 12, 1983
    Assignee: Imperial Chemical Industries PLC
    Inventors: Paul A. Holmes, Frank M. Willmouth, Alan B. Newton