Patents by Inventor Yasuhiro Nishizono

Yasuhiro Nishizono 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).

  • Quick-dissolution solid preparation
    Patent number: 5624687
    Abstract: The invention provides a solid preparation having a quick and pH-independent dissolution with an excellent bioavailability for a drug that is otherwise sharply depressed in solubility with pH elevation. This solid preparation contains granules each comprising a fine particulate core coated with a solid solution comprising a drug which is pH-dependent in solubility and may be released from an enteric base-containing composition at low pH and an enteric base.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: April 29, 1997
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Katsuhiko Yano, Yasuhiro Nishizono, Shigeru Yamazaki, Tadayoshi Ohmura, Shunji Hasumi