Patents by Inventor Naomi Yokosuka

Naomi Yokosuka 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).

  • Toothbrush
    Patent number: 5633083
    Abstract: The present invention relates to a toothbrush (a) wherein a filament implant part is non easily contaminated with bacteria even when using for a long period of time. The toothbrush is characterized by implanting of a filament coveted by a coat of a complex of a polymer having cation exchange capacity and a cationic bactericide.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: May 27, 1997
    Assignees: Sunstar Kabushiki, Toray Monofilament Co., Ltd.
    Inventors: Tatsuaki Iwai, Katsushi Ebisudani, Naomi Yokosuka
  • Dentifrice composition
    Patent number: 5035880
    Abstract: A dentifrice composition stably containing cetylpyridinium chloride and having improved shape retention at a low temperature in the form of an aqueous gel is disclosed. The composition comprises 15 to 80% by weight of a polyoxyethylene-polyoxypropylene block copolymer surfactant based on the total weight of the composition, 0.001 to 5% by weight of cetylpyridinium chloride based on the total weight of the composition, and polyethylene glycol having an average molecular weight of 2,000 to 20,000 in a proportion of 1/200 to 1/4 based on the weight of the polyoxyethylene-polyoxypropylene block copolymer.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: July 30, 1991
    Assignee: Sunstar Kabushiki Kaisha
    Inventors: Shigeki Mori, Naomi Yokosuka