Patents by Inventor Tatsuru Kubo

Tatsuru Kubo 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 determining ammonia and sensor therefor
    Patent number: 4297173
    Abstract: The concentration of ammonia in an aqueous liquid is determined by contacting a sample of the liquid with dissolved oxygen and with a microbial electrode comprising an oxygen-sensitive electrode, a porous membrane, and nitrifying bacteria confined or immobilised by the membrane which are in direct or close contact with the diaphragm of the electrode. The rate of oxygen consumption under otherwise uniform conditions is as precise a measure of concentration of ammonia as a conventional colorimetric method and distillation-titration method.
    Type: Grant
    Filed: May 22, 1980
    Date of Patent: October 27, 1981
    Assignee: Ajinomoto Company, Incorporated
    Inventors: Motohiko Hikuma, Tatsuru Kubo, Takeo Yasuda, Isao Karube, Shuichi Suzuki