Patents by Inventor Yoki Iwase

Yoki Iwase 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).

  • Process and system for purifying pure water or ultrapure water
    Patent number: 5073268
    Abstract: Ultrapure water of extremely high purity, i.e. a so-called ultra-ultrapure water is formed by the present system for purifying a pure water or ultrapure water, (1) the TOC component which was contained in pipes, etc. and which was subsequently dissolved in a pure water or ultrapure water to be treated, is decomposed and the pure water or ultrapure water is simultaneously sterilized, by the combined use of an oxidizing agent and ultraviolet irradiation, (2) the DO contained in the water to be treated and the DO derived from the addition of the oxidizing agent are decomposed into H.sub.2 O and simultaneous sterilization is effected, by the combined use of H.sub.2 gas and ultraviolet irradiation, (3) the remaining H.sub.
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: December 17, 1991
    Assignees: Ebara Corporation, Ebara Research Co., Ltd.
    Inventors: Takayuki Saito, Ken Nakajima, Yoki Iwase, Yukio Ikeda, Hiroyuki Shima