Patents by Inventor Hideo Kiyonaga

Hideo Kiyonaga 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 derivatives
    Patent number: 6251891
    Abstract: A compound represented by the general formula wherein R1 either represents a hydrogen atom or a lower alkyl group, R2 represents a hydrogen atom, an ester residue, an alkali metal or negative charge, and R3 and R4 are the same or different, and each represent a hydrogen atom or a hydrocarbonic group optionally containing hetero atom(s) selected from the group consisting of oxygen atom(s), sulfur atom(s) and nitrogen atom(s), or they are combined together with the nitrogen atom to which they bound to form a heterocyclic group, and the use thereof as an antibacterial agent.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: June 26, 2001
    Assignee: Banyu Pharmaceutical Co., Ltd.
    Inventors: Susumu Nakagawa, Norikazu Otake, Hideo Kiyonaga, Koji Yamada, Hideki Jona, Shigemitsu Okada, Masayuki Ogawa, Hideaki Imamura, Ryosuke Ushijima