Patents by Inventor Kastuyoshi Iwamatsu

Kastuyoshi Iwamatsu 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).

  • Carbapenum derivatives
    Patent number: 6680313
    Abstract: An objective of the present invention is to provide carbapenem derivatives which have potent antibiotic activity against MRSA, PRSP, Influenzavirus, and &bgr;-lactamase-producing bacteria and are stable against DHP-1. The compounds according to the present invention are compounds represented by formula (I) or pharmaceutically acceptable salts thereof: wherein R1 represents H or methyl; R2 and R3 represent H, a halogen atom, alkyl or the like; and R4 represents substituted lower alkylthio or the like.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: January 20, 2004
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Yuko Kano, Takahisa Maruyama, Yumiko Sambongi, Kazuhiro Aihara, Kunio Atsumi, Kastuyoshi Iwamatsu, Takashi Ida
  • Novel carbapenum derivatives
    Publication number: 20030027809
    Abstract: An objective of the present invention is to provide carbapenem derivatives which have potent antibiotic activity against MRSA, PRSP, Influenzavirus, and &bgr;-lactamase-producing bacteria and are stable against DHP-1.
    Type: Application
    Filed: July 25, 2002
    Publication date: February 6, 2003
    Inventors: Yuko Kano, Takahisa Maruyama, Yumiko Sambongi, Kazuhiro Aihara, Kunio Atsumi, Kastuyoshi Iwamatsu, Takashi Ida