Patents by Inventor Ryuji Kanou

Ryuji Kanou 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).

  • Anthraquinone disperse dyes
    Patent number: 3980678
    Abstract: A disperse dye of the formula, ##SPC1##Wherein X.sub.1 and X.sub.2 each are an amino or hydroxyl group, Y is a hydrogen or halogen atom, Z is an oxygen or sulfur atom or a direct linkage, R is a hydrogen or halogen atom or a lower alkyl or lower alkoxy group, n is an integer of from 1 to 4, and m is 1 or 2, which is suitable for dyeing synthetic fibers such as polyester fibers with a high color value and good fastnesses.
    Type: Grant
    Filed: January 28, 1974
    Date of Patent: September 14, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Eiji Yamada, Masao Nishikuri, Ryuji Kanou, Taizo Ohshima