Patents by Inventor Setsuko Kamada

Setsuko Kamada 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 and apparatus for measuring organic carbon content
    Patent number: 6734021
    Abstract: The present invention relates to a method and apparatus for measuring the organic carbon content (TOC) in a test liquid by irradiating the test liquid, such as ultrapure water, with ultraviolet radiation and measuring the conductivity of the test liquid that changes due to the produced organic acids and carbon dioxide. After the test liquid is irradiated for a fixed time interval with ultraviolet light in an oxidization process vessel, the irradiation is stopped. The flow rate of the test liquid is such that a portion of test liquid is present that has received the complete irradiation from the commencement to the extinguishing of the lighting of the ultraviolet light source.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: May 11, 2004
    Assignee: DKK-TOA Corporation
    Inventors: Makoto Saito, Masao Mizuno, Setsuko Kamada