Patents by Inventor Toshio Watanuki

Toshio Watanuki 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).

  • Fibers, a process for preparing the same and product thereof
    Patent number: 5855624
    Abstract: The present invention relates to cellulose fibers excellent in dirt removability and a method of treatment thereof. The cellulose fibers of the invention are liquid ammonia-treated cellulose fibers whose partial or entire exterior is coated with an ester of (A) a polycarboxylic acid having at least three carboxyl groups and (B) a hydrophilic polyol having an oxyethylene group or groups and at least two alcoholic hydroxyl groups and/or which fibers are impregnated with the ester.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: January 5, 1999
    Assignee: New Japan Chemical Co., Ltd.
    Inventors: Kango Fujitani, Yoko Fukuyama, Toshio Watanuki, Hiroyuki Miura, Yutaka Tsujimoto, Kazuhisa Honda, Yoshitaka Uno, Yoshiaki Sakai