Patents by Inventor Toshiro Samejima

Toshiro Samejima 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).

  • Tobacco raw material and method for its production
    Patent number: 5307821
    Abstract: The present invention relates to a method for producing a tobacco raw material having at least a part of its surface coated with a silical gel, which comprises adding silica sol to the tobacco raw material and subjecting the silical gel to gelation.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: May 3, 1994
    Assignees: Asahi Glass Company Ltd., Japan Tobacco Inc.
    Inventors: Katsutoshi Misuda, Hitoshi Kijimuta, Kouichi Numata, Masaharu Tanaka, Yoshinori Katayama, Iku Tomari, Toshiro Samejima