Patents by Inventor Takaaki Ohkuma

Takaaki Ohkuma 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).

  • Crystalline deoxyspergualin, process for its preparation and suppository containing the same
    Patent number: 5196453
    Abstract: The invention provides crystalline deoxyspergualin trihydrochloride, a process for the preparation of the same and a suppository composition containing the same. The compound and composition has antitumor and immunosuppressing activity.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: March 23, 1993
    Assignee: Takara Shuzo Co., Ltd.
    Inventors: Yoshihisa Umeda, Hironobu Hiraga, Takaaki Ohkuma
  • Crystalline deoxyspergualin, process for its preparation and suppository containing the same
    Patent number: 5162581
    Abstract: The invention provides crystalline deoxyspergualin trihydrochloride, a process for the preparation of the same and a suppository composition containing the same. The compound and composition has antitumor and immunosuppressive activity.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: November 10, 1992
    Assignees: Takaru Shuzo Co., Ltd., Nippon Kayaku Kabushiki Kaisha
    Inventors: Katsushige Ikai, Makoto Moriguchi, Yoshihisa Umeda, Ikunoshin Kato, Tetsushi Saino, Hironobu Hiraga, Takaaki Ohkuma
  • Lyophilized preparation of 6-(3-dimethylaminopropionyl)forskolin
    Patent number: 5051132
    Abstract: A lyophilized preparation comprising 6-(3-dimethylaminopropionyl)forskolin, a buffer agent having a pH value of about 3 to about 6 when dissolved, and, as an optional ingredient, a sugar. The lyophilized preparation is excellent in resolubility and stable in both pH and residual percentage.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: September 24, 1991
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Emiko Yamasaki, Takaaki Ohkuma
  • Aqueous solution of nitroglycerin
    Patent number: 4323577
    Abstract: An aqueous solution of nitroglycerin comprising at least one substance selected from among sorbitol, mannitol and xylitol in addition to nitroglycerin, and having a high degree of stability for storage.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: April 6, 1982
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Takaaki Ohkuma, Hiroshi Ninomiya, Masaaki Nakamura, Genichi Idzu