Patents by Inventor Katsushi Nishizawa

Katsushi Nishizawa 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 treating fats and oils
    Patent number: 6998050
    Abstract: The present invention provides a method of treating fats and oils containing low concentrations of aromatic halogen compounds and other contaminants by contacting the fats or oils with an adsorbing agent. The adsorbing agent contains a porous body and a non-protonic polar solvent held in the interiors of fine pores in the porous body to adsorb the contaminants. In one embodiment, the porous body also carries noble metal fine particles. In another embodiment, the adsorbing body comprises a solid acid for adsorbing the contaminants and there is a step of contacting the adsorbing body with an organic solvent to extract the adsorbed contaminants into the organic solvent.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: February 14, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Katsuhiko Nakajoh, Takehiko Muramatsu, Yukishige Maezawa, Masao Kon, Tomohiro Todoroki, Katsushi Nishizawa, Atsushi Ohara
  • Method of treating fats and oils
    Publication number: 20030175401
    Abstract: The present invention provides a method of treating fats and oils containing low concentration aromatic halogen compounds which could remove the aromatic halogen compound contaminant efficiently from the oil and fats.
    Type: Application
    Filed: February 5, 2003
    Publication date: September 18, 2003
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Katsuhiko Nakajoh, Takehiko Muramatsu, Yukishige Maezawa, Masao Kon, Tomohiro Todoroki, Katsushi Nishizawa, Atsushi Ohara
  • System, device and method for quantification of polychlorobiphenyls
    Patent number: 5937267
    Abstract: The present invention is to clear the difficulty in determining the progress of the decomposition reaction of PCBs carried out by a conventional device for decomposing PCBs, and to provide a system for treating PCBs to render them harmless, capable of continuously determining the progress of the decomposition reaction of PCBs at real time by using a predetermined amount of a reaction solution taken out while the decomposition reaction of the PCBs is proceeding.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: August 10, 1999
    Assignee: Kabushiki Kasiha Toshiba
    Inventors: Kenji Todori, Shuji Hayase, Katsushi Nishizawa, Nobutada Aoki, Hideki Shimada, Naoki Tajima, Kazuo Unoki