Patents by Inventor Masanori Tujikawa

Masanori Tujikawa 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).

  • Gelatin hard capsule containing crystalline hydrate of oral cephalosporin
    Patent number: 5017380
    Abstract: An antibacterial, 7.beta.-[(Z)-2-(2-aminothiazol-4-yl)-4-carboxybut-2-enoylamino]-3-cephem-4 -carboxylic acid is stable in a (di or tri)-hydrate crystal form. A pharmacologically effective amount of this hydrate is filled in a gelatin hard capsule and sealed by a band of gelatin to make a stable composition for clinical use after storage for a long time.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: May 21, 1991
    Assignee: Shionogi & Co., Ltd.
    Inventors: Yoshio Hamashima, Kyoji Minami, Kyozo Kawata, Teruo Sakamoto, Toyohiko Takeda, Yusuke Suzuki, Masanori Tujikawa
  • Method for preparing crystalline hydrate of oral celphalosporin and its composition
    Patent number: 4933443
    Abstract: An antibacterial, 7.beta.-[(Z)-2-(2-aminothiazol-4-yl)-4-carboxybut-2-enoylamino]-3-cephem-4 -carboxylic acid is stable in a (di or tri)-hydrate crystal form. A pharmacologically effective amount of this hydrate is filled in a gelatin hard capsule and sealed by a band of gelatin to make a stable composition for clinical use after storage for a long time.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: June 12, 1990
    Assignee: Shionogi & Co., Ltd.
    Inventors: Yoshio Hamashima, Kyoji Minami, Kyozo Kawata, Teruo Sakamoto, Toyohiko Takeda, Yusuke Suzuki, Masanori Tujikawa
  • Crystalline hydrate of oral cephalosporin and its composition
    Patent number: 4812561
    Abstract: An antibacterial, 7.beta.-[(Z)-2-(2-aminothiazol-4-yl)-4-carboxybut-2-enoylamino]-3-cephem-4 -carboxylic acid is stable in a (di or tri)-hydrate crystal form. A pharmacologically effective amount of this hydrate is filled in a gelatin hard capsule sealed by a band of gelatin to make a stable composition for clinical use after storage for a long time.
    Type: Grant
    Filed: July 1, 1987
    Date of Patent: March 14, 1989
    Assignee: Shionogi & Co., Ltd.
    Inventors: Yoshio Hamashima, Kyoji Minami, Kyozo Kawata, Teruo Sakamoto, Toyohiko Takeda, Yusuke Suzuki, Masanori Tujikawa