Patents by Inventor John T. Park

John T. 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).

  • Aromatic polyamide fiber free of crystal defect layers perpendicular to the fiber axis
    Patent number: 5047500
    Abstract: A fiber product comprising one or more fibers of aromatic polyamide polymer having a microscopic structure of an extended molecular chain, free of crystal defect layers perpendicular to the fiber axis, a high inherent viscosity of at least 3.0 [dl/g], and a high tensile strength of at least 15 g/d, said inherent viscosity being determined at 30.degree. C. using a concentration of 0.5 grams of said polymer in 100 ml of concentration sulfuric acid.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: September 10, 1991
    Assignee: Kolon Industries, Inc.
    Inventors: Ho J. Park, Moo S. Rhim, Hak M. Kim, Du H. Kim, Seog C. Yoo, Sang H. Kim, Sa N. B. Park, Ink S. Han, John T. Park, Si M. Kim