Patents by Inventor Seikyu Jinnouchi

Seikyu Jinnouchi 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 producing thiourea dioxide
    Patent number: 5958184
    Abstract: A process for producing a thiourea dioxide fluid by mixing thiourea and a peroxide, or thiourea, a peroxide and a reaction catalyst, or thiourea, a peroxide, a reaction catalyst and a chelating agent, in the absence or presence of pulp and a process for bleaching pulp by the use of the thiourea dioxide fluid produced by the above process economically advantageously with a small chemicals loss and by small consumption of energy.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: September 28, 1999
    Assignee: Mitsubishi Gas Chemical Company Inc.
    Inventors: Toshiaki Kanada, Seikyu Jinnouchi, Masafumi Shimpo, Tetsuo Koshitsuka, Akiko Kimura
  • Process for bleaching fibrous material by hydrogen peroxide
    Patent number: 4378967
    Abstract: A fibrous material is bleached by hydrogen peroxide in a weakly acidic state at a pH of 5-7, and then in a weakly alkaline state at a pH of 8.5-1.1 by adding an alkaline agent to the hydrogen peroxide by one whole charge or continuously after the bleaching in the weakly acidic state and utilizing the remaining hydrogen peroxide. The bleached fibrous material has a soft handling and a high whiteness, and no bleaching unevenness.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: April 5, 1983
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Minoru Yotsuya, Kiyoshi Mae, Seikyu Jinnouchi, Toshio Ochiai