Patents by Inventor Kunikazu Takai

Kunikazu Takai 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).

  • Substituted 7-styryl-carbonyloxy-acetamido cephalosporanic
    Patent number: 4000133
    Abstract: A cephalosporanic acid derivative possessing antibacterial activity and pharmaceutically acceptable salts thereof, and processes for preparing same, having the general formula ##STR1## wherein R.sub.1 is hydrogen, aryl or a heterocyclic groupR.sub.2 is pyridyl or styryl, andR.sub.3 is hydrogen, alkylthio or an unsubstituted or alkyl substituted heterocyclic group.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: December 28, 1976
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Kazuo Kariyone, Osamu Nishiwaki, Kunikazu Takai