Patents by Inventor Emi Sakamoto

Emi Sakamoto 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).

  • Flaky powder of zinc oxide and its composition for external use
    Patent number: 5093099
    Abstract: Flaky fine particles of zinc oxide have an average particle diameter of 0.1 to 1 micron, an average particle thickness of 0.01 to 0.2 micron and a mean platy ratio (aspect ratio) of at least 3. They are useful as an ingredient for an external composition containing a medicine or cosmetic.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: March 3, 1992
    Assignee: Kao Corporation
    Inventors: Tomoyuki Haishi, Emi Sakamoto, Hiroshi Itoh