Patents by Inventor Kouichi Tomisawa

Kouichi Tomisawa 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).

  • Production unit for producing high purity hydrochloric acid and using the same
    Patent number: 6165420
    Abstract: Disclosed is an apparatus for supplying hydrogen chloride gas from a hydrogen chloride gas generator to an absorbing reactor through a gas supply pipe, and a method for producing hydrochloric acid by allowing the gas absorbed in water in an absorbing reactor. The apparatus obtains a large amount of high purity hydrochloric acid having extremely low impurity concentration with a simple system. The inner wall of the gas supply pipe is constructed with such materials from which impurities are not eluted by hydrochloric acid at least to the position of the wall which is reached by the backward flow or splash of produced hydrochloric acid, vapor of the hydrochloric acid or water in an absorbing reactor.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: December 26, 2000
    Assignees: Tsurumi Soda Co., Ltd., Kanto Kagaku Kabushiki Kaisha
    Inventors: Masanori Inoko, Kazunori Akiyama, Kenji Hayashi, Kouichi Tomisawa, Tadashi Koganei, Tatsuharu Obara, Suehiro Oshima, Mitsuru Kageyama, Kazuyuki Suzuki