Patents by Inventor Yoshihiro Sumita

Yoshihiro Sumita 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).

  • &bgr;-lactam compounds and process for producing the same
    Patent number: 6599895
    Abstract: Novel &bgr;-lactam compound of the formula [1]: wherein R1 is lower alkyl or hydroxy-substituted lower alkyl, R2 is H or lower alkyl, X is O or, S, R3 is H, metal or protecting group, W is a 6- or 7-membered nitrogen-containing heterocycle optionally being substituted at carbon atoms. Said &bgr;-lactam compound shows excellent antibacterial activity against Gram-positive bacteria, particularly against methicillin-resistant Staphylococcus aureus and methicillin-resistant and coagulase-negative Staphylococcus aureus.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: July 29, 2003
    Assignee: Sumitomo Pharmaceuticals Company, Limited
    Inventors: Makoto Sunagawa, Hiroshi Yamaga, Yoshihiro Sumita, Hisatoshi Shinagawa
  • Carbapenem compounds and process for producing the same
    Patent number: 5750686
    Abstract: A novel .beta.-lactam compound of the formula ?1!: ##STR1## or a pharmaceutically acceptable salt thereof, which shows an excellent antibacterial activity against Gram-positive bacteria, especially against methicillin-resistant staphylococci and methicillin-resistant coagulase-negative staphylococci, and a process for producing the same. R.sub.1, R.sub.2, X, Y, Z are as defined in the specifacation.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: May 12, 1998
    Assignee: Sumitomo Pharmaceuticals Company, Limited
    Inventors: Makoto Sunagawa, Hiroshi Yamaga, Yoshihiro Sumita