Patents by Inventor Yasushi Taira

Yasushi Taira 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).

  • Patent number: 3951955
    Abstract: A penicillin of the formula: ##SPC1##Wherein A is a substituted or unsubstituted condensed aromatic carbocyclic or heterocyclic ring, R is hydrogen or lower alkyl, X is oxygen or sulfur, Y is hydrogen, lower alkyl, lower alkanoyl or lower alkoxycarbonyl and Z is phenyl or thienyl which can be produced by reacting 6-aminopenicillanic acid or its ester with a carboxylic acid of the formula: ##SPC2##Wherein A, R, X, Y and Z are each as defined above or its reactive derivative. The said penicillin and its non-toxic salts have a broad antimicrobial spectrum against various gram-positive and gram-negative bacteria, and they exhibit characteristically a strong antimicrobial activity against Pseudomonas.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: April 20, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hisao Tobiki, Kozo Shimago, Shigeru Okano, Toshiaki Komatsu, Toyozo Katsura, Yasushi Taira, Yasuko Eda