Patents by Inventor Kyoto Okada

Kyoto Okada 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).

  • Reduction giving 3-cephem compounds
    Patent number: 4081595
    Abstract: Antibacterial cephems having the following formula: ##STR1## (WHEREIN A is amino or substituted amino; COB is carboxy or protected carboxy;R is two hydrogens, hydrogen and a monovalent substituent, or a divalent substituent; andn is zero or one)Are prepared by reducing a compound having the following formula: ##STR2## (WHEREIN A, COB, R, and n are as defined above and X is halo or sulfonyloxy)With a reducing reagent.
    Type: Grant
    Filed: November 11, 1976
    Date of Patent: March 28, 1978
    Assignee: Shionogi & Co., Ltd.
    Inventors: Wataru Nagata, Masayuki Narisada, Yoshio Hamashima, Kyoto Okada