Patents by Inventor Shosuke Ishiwata

Shosuke Ishiwata 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 of cleaning waste gas containing a fluorine component
    Patent number: 4042667
    Abstract: In a method of cleaning a fluorine-containing waste gas evolved frm a furnace, by contacting said gas with a fluorine-reactive powder and filtering the fluorine-reactive powder by a filter, an improvement comprising cooling the waste gas to 150.degree.-400.degree. C; feeding a fluorine-reactive powder into the cooled waste gas; passing the cooled waste gas through a filter on which the fluorine-reactive powder is deposited so as to react with the fluorine component of the waste gas; and removing the deposited powder layer from the filter.
    Type: Grant
    Filed: April 17, 1975
    Date of Patent: August 16, 1977
    Assignee: Asahi Fiber Glass Company Limited
    Inventors: Shosuke Ishiwata, Kaoru Ozaki