Patents by Inventor Tokunori Kito

Tokunori Kito 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 derivatives or salts thereof
    Patent number: 6335447
    Abstract: Novel quinolonecarboxylic acid derivatives of general formula (1) or salts thereof which have potent antibacterial effects on gram-positive bacteria in particular Propionibacterium acnes (wherein R1 represents a hydrogen atom or a carboxyl-protective group; R2 represents an optionally substituted cycloalkyl group; R3 represents a hydrogen atom, a halogen atom, an optionally substituted alkyl, alkoxy or alkylthio group, an optionally protected hydroxyl or amino group, or a nitro group; R4 represents an optionally substituted alkyl or alkoxy group; and Z represents a pyridin-4-yl or pyridin-3-yl group which is optionally substituted with at least one group selected from a halogen atom, an optionally substituted alkyl, alkenyl, cycloalkyl, alkoxy, alkylthio or amino group and an optionally protected hydroxyl or amino group).
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: January 1, 2002
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Kazuya Hayashi, Tokunori Kito, Junichi Mitsuyama, Tetsumi Yamakawa, Hiroshi Kuroda, Hiroyo Kawafuchi