Patents by Inventor Tadami Akatsuka

Tadami Akatsuka 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).

  • Method for assaying the activity of .gamma.-glutamyl transpeptidase in serum
    Patent number: 4336331
    Abstract: Novel L-.gamma.-glutamyl-3-carboxy-4-hydroxyanilide of the formula, ##STR1## an acid addition salt thereof, or an alkali metal or amine salt thereof, which is useful for determining the activity of .gamma.-glutamyl transpeptidase.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: June 22, 1982
    Assignees: Nitto Boseki Co., Ltd., Iatron Laboratories, Inc.
    Inventors: Takeshi Nagasawa, Katsumasa Kuroiwa, Katsuyuki Takabayashi, Norimasa Takizawa, Kazuyo Hagihara, Tadami Akatsuka
  • Novel L-.gamma.-glutamyl-3-carboxy-4-hydroxyanilide and salts thereof
    Patent number: 4281181
    Abstract: Novel L-.gamma.-glutamyl-3-carboxy-4-hydroxyanilide of the formula, ##STR1## an acid addition salt thereof, or an alkali metal or amine salt thereof, which is useful for determining the activity of .gamma.-glutamyl transpeptidase.
    Type: Grant
    Filed: November 14, 1979
    Date of Patent: July 28, 1981
    Assignees: Nitto Boseki Co., Ltd., Iatron Laboratories, Inc.
    Inventors: Takeshi Nagasawa, Katsumasa Kuroiwa, Katsuyuki Takabayashi, Norimasa Takizawa, Kazuyo Hagihara, Tadami Akatsuka
  • Novel L-leucyl-4-hydroxyanilide derivatives
    Patent number: 4209459
    Abstract: Novel L-leucyl-4-hydroxyanilide derivatives of the formula, ##STR1## wherein R represents a carboxyl group or a sulfo group or an acid addition salt thereof, which are useful for assay of leucine-aminopeptidase activity.
    Type: Grant
    Filed: May 4, 1979
    Date of Patent: June 24, 1980
    Assignees: Nitto Boseki Co., Ltd., Iatron Laboratories, Inc.
    Inventors: Takeshi Nagasawa, Katsumasa Kuroiwa, Tadami Akatsuka, Osamu Kodama, Mitoshi Shimamoto