Patents by Inventor Masayasu Sekiguchi

Masayasu Sekiguchi 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).

  • Quinolonecarboxylic acid derivative
    Patent number: 6900225
    Abstract: (?)-7-[(7S)-7-Amino-5-azaspiro[2.4]heptan-5-yl]-6-fluoro-1-[(1R, 2S)-2-fluoro-1-cyclopropyl]-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid.1HCl.1H2O and antibacterial compositions containing this compound. The compound of the present invention exhibits not only excellent antibacterial activity and safety, but also remarkable stability against light and humidity, and is thus useful as an antibacterial agent.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: May 31, 2005
    Assignee: Daiichi Pharmaceutical Co., Ltd.
    Inventors: Makoto Takemura, Hisashi Takahashi, Katsuhiro Kawakami, Masao Itoh, Tetsuya Suzuki, Tsuyoshi Ohtani, Masayasu Sekiguchi, Rie Miyauchi, Isao Hayakawa
  • Quinolonecarboxylic acid derivatives
    Publication number: 20040142957
    Abstract: (−)-7-[(7S)-7-Amino-5-azaspiro[2.4]heptan-5-yl]-6-fluoro-1-[(1R, 2S)-2-fluoro-1-cyclopropyl]-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid.1HCl.1H2O and antibacterial compositions containing this compound. The compound of the present invention exhibits not only excellent antibacterial activity and safety, but also remarkable stability against light and humidity, and is thus useful as an antibacterial agent.
    Type: Application
    Filed: January 9, 2004
    Publication date: July 22, 2004
    Applicant: DAIICHI PHARMACEUTICAL CO., LTD.
    Inventors: Makoto Takemura, Hisashi Takahashi, Katsuhiro Kawakami, Masao Itoh, Tetsuya Suzuki, Tsuyoshi Ohtani, Masayasu Sekiguchi, Rie Miyauchi, Isao Hayakawa
  • Quinolonecarboxylic acid derivative
    Publication number: 20030187008
    Abstract: (−)-7-[(7S)-7-Amino-5-azaspiro[2.4]heptan-5-yl]-6-fluoro-1-[(1R, 2S)-2-fluoro-1-cyclopropyl]-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid.1HCl.1H2O and antibacterial compositions containing this compound. The compound of the present invention exhibits not only excellent antibacterial activity and safety, but also remarkable stability against light and humidity, and is thus useful as an antibacterial agent.
    Type: Application
    Filed: March 31, 2003
    Publication date: October 2, 2003
    Inventors: Makoto Takemura, Hisashi Takahashi, Katsuhiro Kawakami, Masao Itoh, Tetsuya Suzuki, Tsuyoshi Ohtani, Masayasu Sekiguchi, Rie Miyauchi, Isao Hayakawa