Patents by Inventor Hitoshi Wakui

Hitoshi Wakui 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).

  • Wet-process stack gas purification method
    Patent number: 4931263
    Abstract: A wet-process stack gas purification method and apparatus wherein stack gas is scrubbed by bubbling it into a first scrubbing liquid while maintaining the level of the first scrubbing liquid. The above scrubbed gas is subjected to a counter-current contact with a second scrubbing liquid in a scrubbing tower to further purify the gas. The method and apparatus can attain a highly remarkable decontamination effect, and the apparatus is simple in structure and small in size.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: June 5, 1990
    Assignee: Chiyoda Chemical Engineering and Construction Co., Ltd.
    Inventors: Hitoshi Wakui, Nobuo Kiyohara, Haruo Nishino, Osamu Yamamoto