Patents by Inventor Naoyuki Kinoshita

Naoyuki Kinoshita 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).

  • Highly hygroscopic polyamide fiber, and production and application thereof
    Patent number: 5922830
    Abstract: A highly hygroscopic polyamide fiber formed from a polyamide compound containing a polyvinylpyrrolidone (in an amount of 3-15 wt %) which is synthesized in isopropyl alcohol as a solvent, contains pyrrolidone in an amount less than 0.1 wt %, and has a K-value of 20-70. This fiber contains pyrrolidone in an amount less than 0.1 wt % of the amount of polyvinylpyrrolidone. This fiber is characterized by a yellowness index lower than 10 before dyeing, a large difference between the maximum moisture absorptivity and the standard moisture absorptivity, and a low content of water-soluble components that are subject to leaching.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: July 13, 1999
    Assignee: Toray Industries, Inc.
    Inventors: Naoyuki Kinoshita, Tetsuya Katoh, Yumiko Sawai