Patents by Inventor Ryouchi Sekioka

Ryouchi Sekioka 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).

  • Blue type disperse dye mixture
    Patent number: 5734028
    Abstract: A blue type disperse dye mixture comprising a monoazo dye of the formula (1) in an amount of 1.0 part by weight and at least one of anthraquinone dyes of the formulae (2) to (4) in a total amount of from 0.2 to 3.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: March 31, 1998
    Assignee: DyStar Japan Ltd.
    Inventors: Kiyoshi Himeno, Toshio Hihara, Ryouchi Sekioka