Patents by Inventor Tsuyoshi Kikkawa

Tsuyoshi Kikkawa 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).

  • Dye composition and method for dyeing hydrophobic fiber with the same
    Patent number: 6159249
    Abstract: In the dyeing of hydrophobic fibers comprising new synthetic fibers, especially those called micronfine fibers, etc., it is difficult to obtain a dyed product having excellent fastness and it is further difficult to obtained a dyed product excellent also in color rendering. The present invention solved the problem as following:A specific dye composition containing a water-insoluble monoazo disperse dye represented by a specific structural formula is used to dye hydrophobic fibers, especially polyester fibers, comprising micronfine fibers, thereby giving a dyed products excellent in fastness balance and color rendering.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: December 12, 2000
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Yasuo Murakami, Yoshiyuki Sato, Tsuyoshi Kikkawa