Patents by Inventor Chiyoko Nisioka

Chiyoko Nisioka 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).

  • Color fastness of dyed cotton textiles to chlorinated water and process for improving the color fastness of dyed cotton textiles to chlorinated water
    Patent number: 4424061
    Abstract: An agent for improving the color fastness of dyed cotton fibers and textiles to chlorinated water which comprises a specific diamine compound. The combination of the diamine and hydrolyzable tannin further increases the color fastness to chlorinated water. The tannin can be more strongly fixed to the fibers by further treating with a metal salt, whereby an excellent color fastness to chlorinated water can be maintained for a prolonged period of time.
    Type: Grant
    Filed: February 17, 1982
    Date of Patent: January 3, 1984
    Assignee: Dainippon Pharmaceutical Co., Ltd.
    Inventors: Yoshiyuki Shimohiro, Akio Murata, Chiyoko Nisioka