Patents by Inventor Norihiko Tanno

Norihiko Tanno 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).

  • Penicillins and their preparation
    Patent number: 4005075
    Abstract: Penicillins of the formula: ##STR1## wherein R is an unsubstituted phenyl group or a substituted phenyl group having one or more hydroxyl groups or a cyclohexadienyl group and A represents a monocyclic or polycyclic nitrogen-containing heterocyclic aromatic ring, which are useful as antimicrobial agents having a broad antimicrobial spectrum against gram-positive and gram-negative bacteria including Pseudomonas and can be produced advantageously from the phenacyl ester of 6-aminopenicillanic acid through a series of steps.
    Type: Grant
    Filed: September 5, 1975
    Date of Patent: January 25, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hirotada Yamada, Hisao Tobiki, Iwao Nakatsuka, Norihiko Tanno, Kozo Shimago, Takenari Nakagome