Patents by Inventor John T. Hartness

John T. Hartness 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).

  • Resin composition, a fiber reinforced material having a partially impregnated resin and composites made therefrom
    Patent number: 6565944
    Abstract: A partially impregnated preform employs a fiber layer partially impregnated with a resin to form a fiber reinforced resin composite. The fiber layer of the partially impregnated preform is formed of a plurality of parallel oriented tows, each tow formed of a plurality of unidirectional reinforcement fibers. The resin is partially impregnated on one or both faces of the fiber layer. A resin composition for partially impregnating a fiber layer of a preform is also provided. A stack of partially impregnated preforms utilizes a plurality of partially impregnated preforms. The stack of partially impregnated preforms may be cross-ply reinforced by cross-ply stitching the stack of partially impregnated preforms together prior to curing to form a fiber reinforced resin composite upon curing.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: May 20, 2003
    Assignee: Cytec Technology Corp.
    Inventors: John T. Hartness, Guo Feng Xu
  • Resin composition, a fiber reinforced material having a partially impregnated resin and composites made therefrom
    Patent number: 6139942
    Abstract: A partially impregnated preform employs a fiber layer partially impregnated with a resin to form a fiber reinforced resin composite. The fiber layer of the partially impregnated preform is formed of a plurality of parallel oriented tows, each tow formed of a plurality of unidirectional reinforcement fibers. The resin is partially impregnated on one or both faces of the fiber layer. A resin composition for partially impregnating a fiber layer of a preform is also provided.A stack of partially impregnated preforms utilizes a plurality of partially impregnated preforms. The stack of partially impregnated preforms may be cross-ply reinforced by cross-ply stitching the stack of partially impregnated preforms together prior to curing to form a fiber reinforced resin composite upon curing.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: October 31, 2000
    Assignee: Cytec Technology, Inc.
    Inventors: John T. Hartness, Guo Feng Xu