Patents by Inventor Nobumitsu Kitajima

Nobumitsu Kitajima 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 for purifying matter contaminated with halogenated organic compounds
    Patent number: 6828141
    Abstract: A method for purifying matter contaminated with a halogenated organic compound is disclosed. The method includes the step of adding a reducing agent and a nutritional source for a heterotrophic anaerobic microorganism to the contaminated matter. The reducing agent is reduced iron, cast iron, iron-silicon alloy and so on, or a water soluble compound. A combination of chemical reactions with microorganisms allows to decompose the halogenated organic compound. The nutritional source including an organic carbon and 20 to 50 percent by weight of an oxidized form of nitrogen is added, thereby preventing by products of the decomposition such as generation of noxious gases and decoloration of soil. A method includes the steps of mixing a reducing agent and a nutritional liquid with the contaminated matter, wherein the mixing step including a step of adjusting the contaminated matter at pH ranging from 4.5 to 9.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: December 7, 2004
    Assignee: Ebara Corporation
    Inventors: Naoaki Kataoka, Tatsuo Shimomura, Nobumitsu Kitajima, Naoki Seki, Hiroshi Shinmura
  • Method for purifying matter contaminated with halogenated organic compounds
    Publication number: 20020012987
    Abstract: A method for purifying matter contaminated with a halogenated organic compound is disclosed. The method includes the step of adding a reducing agent and a nutritional source for a heterotrophic anaerobic microorganism to the contaminated matter. The reducing agent is reduced iron, cast iron, iron-silicon alloy and so on, or a water soluble compound. A combination of chemical reactions with microorganisms allows to decompose the halogenated organic compound. The nutritional source including an organic carbon and 20 to 50 percent by weight of an oxidized form of nitrogen is added, thereby preventing by products of the decomposition such as generation of noxious gases and decoloration of soil. A method includes the steps of mixing a reducing agent and a nutritional liquid with the contaminated matter, wherein the mixing step including a step of adjusting the contaminated matter at pH ranging from 4.5 to 9.
    Type: Application
    Filed: July 9, 2001
    Publication date: January 31, 2002
    Inventors: Naoaki Kataoka, Tatsuo Shimomura, Nobumitsu Kitajima, Naoki Seki, Hiroshi Shinmura
  • Method for purifying matter contaminated with halogenated organic compounds
    Patent number: 6303367
    Abstract: A method for purifying matter contaminated with a halogenated organic compound is disclosed. The method includes the step of adding a reducing agent and a nutritional source for a heterotrophic anaerobic microorganism to the contaminated matter. The reducing agent is reduced iron, cast iron, iron-silicon alloy and so on, or a water soluble compound. A combination of chemical reactions with microorganisms allows to decompose the halogenated organic compound. The nutritional source including an organic carbon and 20 to 50 percent by weight of an oxidized form of nitrogen is added, thereby preventing by products of the decomposition such as generation of noxious gases and decoloration of soil. A method includes the steps of mixing a reducing agent and a nutritional liquid with the contaminated matter, wherein the mixing step including a step of adjusting the contaminated matter at pH ranging from 4.5 to 9.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: October 16, 2001
    Assignee: Ebara Corporation
    Inventors: Naoaki Kataoka, Tatsuo Shimomura, Nobumitsu Kitajima, Naoki Seki, Hiroshi Shinmura