Patents by Inventor Im K. Park

Im K. Park 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).

  • Laminated skin-foamed core sandwich structures and method for their preparation
    Patent number: 4543289
    Abstract: Laminated skin-foamed core sandwich structures characterized by an excellent stiffness and load-bearing capability to weight ratio are prepared by heating in a closed mold a sandwich construction that comprises skin layers that comprise a thermoplastic polymer having a glass transition temperature in the range of 75.degree. to 85.degree. C. and reinforcing fibers and a core that comprises a thermoplastic polymer that is compatible with the polymer in the skin layers and that has a glass transition temperature that is 10.degree. to 20.degree. C. lower than that of the polymer in the skin layers and a blowing agent at a temperature sufficient to fuse and expand the core and to fuse the skin layers and bond them to the expanded core.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: September 24, 1985
    Assignee: Tenneco Polymers, Inc.
    Inventor: Im K. Park
  • Method of making thermoplastic resin composite
    Patent number: 4058581
    Abstract: A unidirectional fiber reinforced thermoplastic stock material is prepared by passing fibers through a resin solution to coat the fibers. The coated fibers are treated to remove the solvent and thereafter are consolidated into the desired shape.
    Type: Grant
    Filed: October 28, 1976
    Date of Patent: November 15, 1977
    Assignee: Exxon Research & Engineering Co.
    Inventor: Im K. Park