Patents by Inventor Yoshio Okaya

Yoshio Okaya 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).

  • External skin preparation
    Patent number: 5169630
    Abstract: A manganese-containing superoxide dismutase activity of an aqueous external skin preparation which contains (a) manganese-containing superoxide dismutase and/or a modification of manganese-containing superoxide dismutase and (b) a physiologically acceptable water-soluble manganese salt is effective maintained and the aqueous external skin preparation is used for combatting skin-roughening.
    Type: Grant
    Filed: October 18, 1990
    Date of Patent: December 8, 1992
    Assignees: Pola Chemical Industries, Ltd., Takeda Chemical Industries, Ltd.
    Inventors: Yoshio Okaya, Katsumi Tomoda, Taihei Hamazaki