Patents by Inventor Yoko Iwase

Yoko 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 for removing dissolved oxygen from water and system therefor
    Patent number: 5190627
    Abstract: Ultrapure water is formed by a process employing a simple system for safely and easily removing oxygen from water containing dissolved oxygen; which process comprises dissolving a reducing agent in water containing dissolved oxygen and irradiating the resulting water with ultraviolet rays. The ultrapure water is particularly utilized as a rinsing water in the electronics industry.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: March 2, 1993
    Assignees: Ebara Corporation, Ebara Research Co., Ltd.
    Inventors: Takayuki Saito, Hidenobu Arimitsu, Ken Nakajima, Yoko Iwase, Hiroyuki Shima