Patents by Inventor Seiji Shimura

Seiji Shimura 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).

  • Agent and method for treating wool fibers wherein the agent is tris(hydroxypropyl)phosphine and/or alkylene oxide addition products thereof
    Patent number: 5147409
    Abstract: The present invention discloses an agent and a method of treating wool fibers using the agent which contains as an active ingredient, one or more water-soluble organic phosphine compounds selected from the group comprising hydroxyalkylphosphines expressed by the following formula: ##STR1## (wherein R.sup.1 denotes a hydroxyalkyl group having 1 to 10 carbon atoms and R.sup.2 and R.sup.3 each denotes an alkyl or hydroxyalkyl group having 1 to 10 carbon atoms) and derivatives thereof such as alkylene oxide addition products, phosphonium salts and quaternary phosphonium compounds thereof.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: September 15, 1992
    Assignees: Nippon Chemical Industrial Co., Ltd., Koizumi Chemical Co., Ltd., Chiyoda Shoji Co., Ltd.
    Inventors: Seiji Shimura, Masashi Sugiya, Yoshifusa Hara, Kunio Kako, Akira Saito