Patents by Inventor Setsuzo Takahashi

Setsuzo Takahashi 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).

  • Reactive disazo dyestuffs containing triazines
    Patent number: 4474696
    Abstract: Reactive azo dyestuffs which, in the form of free acid, are represented by the following formula: ##STR1## (wherein R is hydrogen or methyl) are characterized by exhibiting the following properties: high fixation efficiency, excellent wash-off, high build-up and excellent wet fastness. Such dyestuffs give dyeings excellent in light fastness, chlorine fastness and color yield.
    Type: Grant
    Filed: June 3, 1980
    Date of Patent: October 2, 1984
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Setsuzo Takahashi, Hideo Inoue, Hideo Otake, Hiroshi Senoo