Patents by Inventor Kazuo Hanawa

Kazuo Hanawa 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).

  • Aqueous liquid composition of naphthalene sulfonate reactive dye with at least one lithium or tri-ethanol ammonium cation
    Patent number: 5032140
    Abstract: A reactive dye represented by the formula (I), ##STR1## wherein R represents --NH.sub.2 or --NHC.sub.2 H.sub.4 SO.sub.3 M, and M's independently represent Li.sup..sym., Na.sup..sym., K.sup..sym. or .sup..sym. NH(C.sub.2 H.sub.4 OH).sub.3, provided that at least one of M's represents Li.sup..sym. or .sup..sym. NH(C.sub.2 H.sub.4 OH).sub.3. This reactive dye easily gives a stable liquid composition and is useful to dye cellulosic or polyamide fibers.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: July 16, 1991
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Nobuyuki Yamanaka, Kazuo Hanawa, Eiichi Ogawa