Patents by Inventor Akira Matsubara

Akira Matsubara 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).

  • Cephalosporins
    Patent number: 4296112
    Abstract: A cephalosporanic acid of the general formula ##STR1## wherein A represents ##STR2## and the pharmaceutically acceptable salt and ester thereof.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: October 20, 1981
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akira Matsubara, Hideaki Sakai, Makoto Odate, Toshio Suganuma, Takuo Nakano
  • Cephalosporins
    Patent number: 4283398
    Abstract: A cephalosporanic acid of the general formula ##STR1## wherein Y represents a hydrogen atom or a hydroxyl group, and the biologically acceptable salt and ester thereof.
    Type: Grant
    Filed: November 26, 1979
    Date of Patent: August 11, 1981
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akira Matsubara, Hideaki Sakai, Toshio Suganuma, Nobuyuki Fukazawa, Takuo Nakano
  • 4-Hydroxy-5,6,7,8-tetrahydroquinoline-3-carboxylic acids and derivatives
    Patent number: 4273932
    Abstract: Disclosed is a quinoline derivative having the general formula ##STR1## where A represents a six-membered hydrocarbon ring; X represents an oxygen atom, an .dbd.NOR.sup.1 group in which R.sup.1 is a hydrogen atom or a lower alkyl radical of from 1 to 5 carbon atoms, a hydroxyl group, or an --NHR.sup.2 group in which R.sup.2 is a hydrogen atom or an acyl group; and Y represents a hydrogen atom, a salt-forming radical, or an ester-forming radical. This quinoline derivative is a novel compound which has antiallergic effects in itself and is useful as an intermediate in the production of penicillin or cephalosporin derivatives.
    Type: Grant
    Filed: January 29, 1980
    Date of Patent: June 16, 1981
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Akira Matsubara, Hideaki Sakai, Makoto Odate, Takuo Nakano
  • Quinolinecarboxylic acid substituted penicillins and pharmaceutical compositions containing the same
    Patent number: 4263302
    Abstract: A penicillanic acid of the general formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each represent a hydrogen atom or a lower alkyl group, provided that R.sup.1, R.sup.2 and R.sup.3 do not simultaneously represent a hydrogen atom, or a biologically acceptable salt thereof.
    Type: Grant
    Filed: November 20, 1979
    Date of Patent: April 21, 1981
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Akira Matsubara, Hideaki Sakai, Takuo Nakano, Toshio Suganuma