Patents by Inventor Tatsuo Nishimura

Tatsuo Nishimura 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).

  • 7[(2-Thiazolyl)-2-(oxoimino)acetamido]cephalosporin derivatives
    Patent number: 4200575
    Abstract: Novel [2-(syn)-carbamoyloximinoacetamido]cephalosporins of the formula: ##STR1## [wherein, Y.sup.1 is hydrogen, hydroxyl, carbamoyloxy, acyloxy, quaternary ammonium or nitrogen-containing heterocyclic thio; R.sup.1 is alkyl, aralkyl or aryl; R.sup.2 is hydrogen or an ester residue; k is 0 or 1] and a salt thereof show strong antibacterial activities particularly against Gram-negative bacteria and they are useful as antibacterial agents.
    Type: Grant
    Filed: August 1, 1978
    Date of Patent: April 29, 1980
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Mitsuo Numata, Tatsuo Nishimura
  • Cephalosporins
    Patent number: 4172891
    Abstract: A novel cephalosporin derivative of the formula: ##STR1## [wherein X is hydrogen, hydroxyl, acyloxy, alkoxy, carbamoyloxy, quaternary ammonium or a group of the formula --SR.sup.1 (where R.sup.1 is a nitrogen-containing heterocyclic group)] or a pharmaceutically acceptable salt or ester thereof is found to have potent antibiotic activity against various bacteria, particularly against gram-negative bacteria such as Escherichia coli, Klebsiella pneumoniae, Proteus vulgaris, Proteus mirabilis, Proteus morganii, Proteus rettgeri and Citrobacter freundii.
    Type: Grant
    Filed: March 31, 1977
    Date of Patent: October 30, 1979
    Assignee: Takeda Chemical Industries, Inc.
    Inventors: Mitsuo Numata, Masayoshi Yamaoka, Isao Minamida, Mitsuru Shiraishi, Tatsuo Nishimura