Patents by Inventor Tomiyoshi Itoh

Tomiyoshi Itoh 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).

  • Antitumor agent
    Patent number: 4521406
    Abstract: An antitumor agent comprising a combination of 5-fluorocytosine and cytosinedeaminase has been developed. As to the practical administration procedure of the agent, it is preferable to carry out in such a manner that 5-fluorocytosine is first administered in any portion of the body, and cytosinedeaminase is then administered into the topically suffered portion. The administered 5-fluorocytosine is transferred into the suffered portion, and the 5-fluorocytosine is affected with the action of cytosinedeaminase to convert the former compound into 5-fluorouracil, resulting in that the necrosis of the tumor tissue is caused.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: June 4, 1985
    Assignee: Chisso Corporation
    Inventors: Yasuo Kawamura, Tadashi Nishiyama, Tomiyoshi Itoh, Takuo Sakai