Patents by Inventor Frank M. Willmouth

Frank M. Willmouth 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).

  • Heat-treating coated polyolefin films
    Patent number: 4415523
    Abstract: The invention provides a method of heat-treating a biaxially oriented polyolefin film by constraining the film against shrinkage, heating the constrained film to at least the minimum stress relaxation temperature of the polyolefin, and thereafter cooling the treated film to a temperature below the alpha-relaxation temperature of the polyolefin.The film is preferably heated rapidly to the required temperature and cooled rapidly therefrom. The resultant films exhibit good modulus and thermal shrinkage characteristics. The heat-treatment may be supplemented by a conventional heat-setting operation to improve heat-sealing characteristics of the treated films.
    Type: Grant
    Filed: October 13, 1981
    Date of Patent: November 15, 1983
    Assignee: Imperial Chemical Industries PLC
    Inventors: Peter J. Barham, Jeffrey A. Odell, Frank M. Willmouth
  • 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
  • Heat-treating polyolefin films
    Patent number: 4311660
    Abstract: The invention provides a method of heat-treating a biaxially oriented polyolefin film by constraining the film against shrinkage, heating the constrained film to at least the minimum stress relaxation temperature of the polyolefin, and thereafter cooling the treated film to a temperature below the alpha-relaxation temperature of the polyolefin. The film is preferably heated rapidly to the required temperature and cooled rapidly therefrom. The resultant films exhibit good modulus and thermal shrinkage characteristics. The heat-treatment may be supplemented by a conventional heat-setting operation to improve heat-sealing characteristics of the treated films.
    Type: Grant
    Filed: July 16, 1980
    Date of Patent: January 19, 1982
    Assignee: Imperial Chemical Industries Limited
    Inventors: Peter J. Barham, Jeffrey A. Odell, Frank M. Willmouth