Patents by Inventor Masakazu Kitayama

Masakazu Kitayama 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).

  • Pharmaceutical composition comprising calcium polycarbophil
    Patent number: 5213806
    Abstract: A pharmaceutical composition capable of being disintegrated in an acidic environment, which comprises calcium polycarbophil and 1 to 80% by weight of a cellulose derivative such as carboxymethylcellulose or low substituted hydroxypropylcellulose based on the calcium polycarbophil. The pharmaceutical composition in a form of a tablet, a capsule, or granules is useful as a bulk-forming laxative or an antidiarrheic agent since it can be disintegrated readily in the stomach and form a complete dispersion of polycarbophil in the digestive tract.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: May 25, 1993
    Assignee: Hokuriku Pharmaceutical Co., Ltd.
    Inventors: Yasuo Ito, Hideo Kato, Osamu Nagata, Masaharu Yamazaki, Takeo Ishibashi, Masakazu Kitayama