Patents by Inventor Takanori Tohyama

Takanori Tohyama 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).

  • .gamma.-glutamyl-p-aminoanilide derivatives for measuring activity of .gamma.-glutamyl transpeptidase
    Patent number: 4177109
    Abstract: A .gamma.-glutamyl-p-aminoanilide derivative of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently lower alkyl; and R.sup.3 is hydrogen, lower alkyl, carboxyl or sulfo, can be produced by reacting a N-phthalyl-.gamma.-glutamyl-p-aminoanilide derivative with hydrazine. The .gamma.-glutamyl-p-aminoanilide derivative can be used as a substrate for measuring .gamma.-glutamyl transpeptidase activity in a living sample.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: December 4, 1979
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Takanori Tohyama, Masaaki Nakahata