Patents by Inventor Harunkuni Tokoda

Harunkuni Tokoda 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).

  • Inhibitory effect of synthetic and natural colorants on carcinogenesis
    Patent number: 6284224
    Abstract: A method of treating a group of mammals which have been topically exposed to a tumor promoter or a tumor initiator so as to reduce the percentage of mammals which exhibit formation of epidermal tumors. The topically exposed tissue is treated with an acetone solution containing a defined amount of a synthetic colorant. Preferably, the synthetic colorant is tartrazine or erythrosine B.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: September 4, 2001
    Inventors: Govind J. Kapadia, Harunkuni Tokoda, Takao Konoshima, Midori Takasaki, Hoyoku Nishino