Patents by Inventor Katsufumi Sebata

Katsufumi Sebata 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).

  • Azetidinone derivatives and method for producing azetidinone and cephalosoporin derivatives
    Patent number: 5596096
    Abstract: New compounds are disclosed having the general formulas (1) and (2): ##STR1## Also described is a process for preparing the compounds of formulas (1) and (2). Further described is a process for preparing a cephalosporin derivative having formula (5): ##STR2## by converting the compound of formula (1) to the compound of formula (2) and then converting the compound of formula (2) to the compound of formula (5).
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: January 21, 1997
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Osamu Sakanaka, Shouhei Yasuda, Shinjiro Sumi, Katsufumi Sebata, Katsuharu Iinuma, Ken Nishihata
  • Method for producing azetidinone and cephalosporin derivatives
    Patent number: 5405955
    Abstract: New compounds are disclosed having the general formulas (1) and (2): ##STR1## Also described is a process for preparing the compounds of formulas (1) and (2). Further described is a process for preparing a cephalosporin derivative having formula (5): ##STR2## by converting the compound of formula (1) to the compound of formula (2) and then converting the compound of formula (2) to the compound of formula (5).
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: April 11, 1995
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Osamu Sakanaka, Shouhei Yasuda, Shinjiro Sumi, Katsufumi Sebata, Katsuharu Iinuma, Ken Nishihata