Patents by Inventor Takahisa Igaki

Takahisa Igaki 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).

  • Preparation for epidermis
    Patent number: 5599528
    Abstract: A preparation for epidermis containing kojic acid and/or its derivative and a surfactant or surfactants having HLB value adjusted to 12 or less than that is disclosed. This preparation is preferably in a form of O/W emulsion or W/O emulsion, with the latter being preferably formed by gel emulsification process. The surfactants or surface active agents serve to depress coloration or decomposition of kojic acid and/or its derivative and improve application feel of the preparation.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: February 4, 1997
    Assignee: Sansho Seiyaku Co., Ltd.
    Inventor: Takahisa Igaki