Patents by Inventor Astsushi Koiwa

Astsushi Koiwa 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).

  • Carbapenem compound crystals and interjection preparations
    Patent number: 7084268
    Abstract: The present invention provides carbapenem hydrochloride trihydrate crystals, which are chemically stable, easily purified and useful as antimicrobial agents, a process for producing them, and a powdery charged preparation for injection containing them. That is, it provides carbapenem hydrochloride trihydrate crystals having a powdery X-ray diffraction pattern containing lattice distances (d) of 9.0, 4.1 and 2.8 ?, a process for producing them, and a powdery charged preparation for injection containing them.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: August 1, 2006
    Assignee: Eisai Co., Ltd.
    Inventors: Hiroyuki Chiba, Masahiko Tsujii, Astsushi Koiwa, Shin Sakurai, Akio Kayano, Hiroyuki Ishizuka, Hiroyuki Saito, Taiju Nakamura, Ikuo Kushida, Yasuyuki Suzuki, Takako Yoshiba, Kazuhide Ashizawa, Masahiro Sakurai, Eiichi Yamamoto
  • Carbapenem compound crystals and injection preparations
    Publication number: 20060040916
    Abstract: The present invention provides carbapenem hydrochloride trihydrate crystals, which are chemically stable, easily purified and useful as antimicrobial agents, a process for producing them, and a powdery charged preparation for injection containing them. That is, it provides carbapenem hydrochloride trihydrate crystals having a powdery X-ray diffraction pattern containing lattice distances (d) of 9.0, 4.1 and 2.8 ?, a process for producing them, and a powdery charged preparation for injection containing them.
    Type: Application
    Filed: October 26, 2005
    Publication date: February 23, 2006
    Inventors: Hiroyuki Chiba, Masahiko Tsujii, Astsushi Koiwa, Shin Sakurai, Akio Kayano, Hiroyuki Ishizuka, Hiroyuki Saito, Taiju Nakamura, Ikuo Kushida, Yasuyuki Suzuki, Takako Yoshiba, Kazuhide Ashizawa, Masahiro Sakurai, Eiichi Yamamoto