Patents by Inventor Mitsuharu Irie

Mitsuharu Irie 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).

  • Cosmetic preparation, surface-hydrophobized silica-coated metal oxide particles, sol of silica-coated metal oxide, and processes for producing these
    Patent number: 6534044
    Abstract: The invention relates to (1) a cosmetic material comprising silica-coated metal oxide particles further surface-treated with a hydrophobicizing agent, and (2) metal oxide particles having a specified infrared absorption spectrum intensity ratio and refractive index which are further treated with a hydrophobicizing agent, and to a process for their production. The invention further relates to a silica-coated metal oxide sol which gives such particles, and to a process for its production. The invention can give ultraviolet-screening cosmetic materials with an excellent transparent feel, wherein the particles are satisfactorily dispersed.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: March 18, 2003
    Assignee: Showa Denko K.K
    Inventors: Koichi Wada, Nobuaki Ishii, Mitsuharu Irie, Kazuo Sekiguchi, Michihiro Takama