Patents by Inventor Joyce Hallam

Joyce Hallam 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).

  • Treatment of carbon fibre
    Patent number: 4269876
    Abstract: A method of treating carbon fibre in which the fibre is subjected to a surface removal step followed by a surface deactivation step. The surface deactivation step comprises either removing at least some of the functional groups on the surface of the fibre or rendering those functional groups incapable of forming a chemical bond with a resin matrix material. When such treated fibres are incorporated in a resin matrix, the resultant composite material is provided with enhanced strength properties when compared with similar composite materials containing untreated carbon fibres.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: May 26, 1981
    Assignee: Rolls-Royce Limited
    Inventors: David J. Lind, Valerie J. Coffey, Joyce Hallam
  • Treatment of carbon fibre
    Patent number: 4243646
    Abstract: A method of treating carbon fibre in which the fibre is subjected to a surface removal step followed by a surface deactivation step. The surface deactivation step comprises either removing at least some of the functional groups on the surface of the fibre or rendering those functional groups incapable of forming a chemical bond with a resin matrix material. When such treated fibres are incorporated in a resin matrix, the resultant composite material is provided with enhanced strength properties when compared with similar composite materials containing untreated carbon fibres.
    Type: Grant
    Filed: August 29, 1978
    Date of Patent: January 6, 1981
    Assignee: Rolls-Royce Limited
    Inventors: David J. Lind, Valerie J. Coffey, Joyce Hallam