Patents by Inventor Naito Toshihiko

Naito Toshihiko 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).

  • 3-propenylcephem derivative
    Patent number: 5066812
    Abstract: A 3-propenylcephem derivative of the following formula: ##STR1## wherein R.sub.1 represents a fluoro-substituted lower alkyl group or a cyano-substituted lower alkyl group, and A represents a cyclic or an acylic ammonio group, or a pharmaceutically acceptable salt thereof, exhibiting excellent anti-bacterial activities against both Gram-positive bacteria and Gram-negative bacteria; Process for the preparation thereof; Anti-bacterial composition; intermediate for the 3-propenylcephem derivative; and Process for the preparation of the intermediate.
    Type: Grant
    Filed: January 11, 1990
    Date of Patent: November 19, 1991
    Assignee: Eisai Co., Ltd.
    Inventors: Kamiya Takashi, Naito Toshihiko, Negi Shigeto, Komatu Yuuki, Kai Yasunobu, Nakamura Takaharu, Sugiyama Isao, Machida Yoshimasa, Nomoto Seiichiro, Kitoh Kyosuke, Katsu Kanemasa, Yamauchi Hiroshi