Patents by Inventor Michiyuki Ishii

Michiyuki Ishii 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).

  • X-ray contrast medium comprising barium and xanthan gum for examination of large intestine and small intestine
    Patent number: 5518711
    Abstract: This invention provides an X-ray contrast medium for examination of the large and the small intestine comprising an aqueous suspension containing 15 to 35 w/v % of barium sulfate and 0.6 to 0.15 w/v % of xanthan gum, wherein when the barium sulfate concentration is in the range of 15 to 20 w/v %, the amount of xanthan gum used is in the range of 0.3 to 0.6 w/v %; when the barium sulfate concentration is in the range of 20 to 30 w/v %, the amount of xanthan gum used is in the range of 0.2 to 0.5 w/v %; and when the barium sulfate concentration is in the range of 30 to 35 w/v %, the amount of xanthan gum used is in the range of 0.15 to 0.4 w/v %, and wherein, in each case, the higher the barium sulfate concentration is, the smaller the amount of xanthan gum used is; and the lower the barium sulfate concentration is, the larger the amount of xanthan gum used is.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: May 21, 1996
    Assignee: Ohta Seiyaku Kabushiki Kaisha
    Inventors: Yoshito Tonariya, Hiroaki Shimizu, Yukihito Wada, Kazuhiro Yamaguchi, Tomio Yamasaki, Michiyuki Ishii, Yoichi Tojima, Mitsuo Togashi, Yukihiro Noguchi