Patents by Inventor John B. Barr

John B. Barr 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).

  • Spin size and thermosetting aid for pitch fibers
    Patent number: 4276278
    Abstract: A method of treating a multifilament bundle of pitch fibers, such as yarn or tow, to prepare such multifilament bundle for further processing which comprises applying to the fibers thereof an aqueous finishing composition comprising a dispersion of graphite or carbon black in water in which is dissolved a water-soluble surfactant which is also capable of functioning as an oxidizing agent. The finishing composition serves as both a size for the fiber bundle and as a thermosetting aid during infusibilization of the fibers.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: June 30, 1981
    Assignee: Union Carbide Corporation
    Inventors: John B. Barr, Nicholas F. White, III
  • Spin size and thermosetting aid for pitch fibers
    Patent number: 4275051
    Abstract: A method of treating a multifilament bundle of pitch fibers, such as yarn or tow, to prepare such multifilament bundle for further processing which comprises applying to the fibers thereof an aqueous finishing composition comprising a dispersion of graphite or carbon black in water in which is dissolved a water-soluble oxidizing agent and a water-soluble surfactant. The finishing composition serves as both a size for the fiber bundle and as a thermosetting aid during infusibilization of the fibers.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: June 23, 1981
    Assignee: Union Carbide Corporation
    Inventor: John B. Barr