Patents by Inventor Kiyoshi Itou

Kiyoshi Itou 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).

  • Publication number: 20140018514
    Abstract: Glycolic acid having a high purity is obtained by subjecting glycolic acid or a glycolic acid solution containing contaminants to double-chamber electrodialysis combined with one or more treatments selected from among treatment with an activated carbon, treatment with an ion exchange resin, concentration treatment and cooling crystallization.
    Type: Application
    Filed: July 22, 2013
    Publication date: January 16, 2014
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Shinya OKAZAKI, Kaori Matoishi, Kiyoshi Itou
  • Patent number: 8519185
    Abstract: Glycolic acid having a high purity is obtained by subjecting glycolic acid or a glycolic acid solution containing contaminants to double-chamber electrodialysis combined with one or more treatments selected from among treatment with an activated carbon, treatment with an ion exchange resin, concentration treatment and cooling crystallization.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: August 27, 2013
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Shinya Okazaki, Kaori Matoishi, Kiyoshi Itou
  • Patent number: 7700330
    Abstract: The invention is to provide a process for effectively removing impurities contained in an amide compound-containing solution by making an amide compound-containing solution, particularly an amide compound-containing solution produced by a hydration reaction of a nitrile compound by using a microorganism fungus body containing nitrile hydratase or a processed product of the microorganism fungus body, in contact with activated carbon under acidic conditions.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: April 20, 2010
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Takeya Abe, Kiyoshi Itou, Kenju Sasaki, Seiichi Watanabe, Tamotsu Asano
  • Publication number: 20100022740
    Abstract: Glycolic acid having a high purity is obtained by subjecting glycolic acid or a glycolic acid solution containing contaminants to double-chamber electrodialysis combined with one or more treatments selected from among treatment with an activated carbon, treatment with an ion exchange resin, concentration treatment and cooling crystallization.
    Type: Application
    Filed: October 26, 2006
    Publication date: January 28, 2010
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Shinya Okazaki, Kaori Matoishi, Kiyoshi Itou
  • Patent number: 7175948
    Abstract: There are provided a pigment-containing coloring material stably dispersible in a high concentration in various organic solvents, and a process for producing the same. The production process of the coloring material is characterized by comprising the steps of: providing a solution comprising (1) a soluble pigment precursor which is convertible into an insoluble pigment, (2) a solvent capable of dissolving the soluble pigment precursor therein, and (3) a stabilizing agent comprising an organic compound having a structure or a functional group capable of stabilizing the dispersibility of the insolubilized pigment in the solvent; and converting said soluble pigment precursor into an insoluble pigment to obtain the coloring material containing the insolubilized pigment dispersed stably in the solvent.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: February 13, 2007
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Toshio Yoshihara, Kiyoshi Itou, Kazuhiko Nakamura, Minoru Furukawa, Abul Iqbal, Zhimin Hao
  • Patent number: 6982330
    Abstract: The present invention provides a new carbazole based compound represented by the following formula (1): wherein R is a substituent selected among a hydrogen atom, an alkyl group, an alkyl ether group, a sulfoamino group, a carbon cyclic group, a heterocyclic group and an aromatic cyclic group, ā€œnā€ is integer, where at least one substituent other than the hydrogen atom are introduced and the each substituent may be the same or different.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: January 3, 2006
    Assignee: Dai Nippon Printing Co., LTD
    Inventor: Kiyoshi Itou
  • Publication number: 20040050294
    Abstract: There are provided a pigment-containing coloring material stably dispersible in a high concentration in various organic solvents, and a process for producing the same. The production process of the coloring material is characterized by comprising the steps of: providing a solution comprising (1) a soluble pigment precursor which is convertible into an insoluble pigment, (2) a solvent capable of dissolving the soluble pigment precursor therein, and (3) a stabilizing agent comprising an organic compound having a structure or a functional group capable of stabilizing the dispersibility of the insolubilized pigment in the solvent; and converting said soluble pigment precursor into an insoluble pigment to obtain the coloring material containing the insolubilized pigment dispersed stably in the solvent.
    Type: Application
    Filed: August 18, 2003
    Publication date: March 18, 2004
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Toshio Yoshihara, Kiyoshi Itou, Kazuhiko Nakamura, Minoru Furukawa, Abul Iqbal, Zhimin Hao
  • Patent number: 6656985
    Abstract: There are provided a pigment-containing coloring material stably dispersible in a high concentration in various organic solvents, and a process for producing the same. The production process of the coloring material is characterized by comprising the steps of: providing a solution comprising (1) a soluble pigment precursor which is convertible into an insoluble pigment, (2) a solvent capable of dissolving the soluble pigment precursor therein, and (3) a stabilizing agent comprising an organic compound having a structure or a functional group capable of stabilizing the dispersibility of the insolubilized pigment in the solvent; and converting said soluble pigment precursor into an insoluble pigment to obtain the coloring material containing the insolubilized pigment dispersed stably in the solvent.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: December 2, 2003
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Toshio Yoshihara, Kiyoshi Itou, Kazuhiko Nakamura, Minoru Furukawa, Abul Iqbal, Zhimin Hao
  • Publication number: 20030214228
    Abstract: The present invention provides a new carbazole based compound represented by the following formula (1): 1
    Type: Application
    Filed: March 24, 2003
    Publication date: November 20, 2003
    Inventor: Kiyoshi Itou
  • Publication number: 20030104586
    Abstract: The invention is to provide a process for effectively removing impurities contained in an amide compound-containing solution by making an amide compound-containing solution, particularly an amide compound-containing solution produced by a hydration reaction of a nitrile compound by using a microorganism fungus body containing nitrile hydratase or a processed product of the microorganism fungus body, in contact with activated carbon under acidic conditions.
    Type: Application
    Filed: September 14, 2001
    Publication date: June 5, 2003
    Inventors: Takeya Abe, Kiyoshi Itou, Kenju Sasaki, Seiichi Watanabe, Tamotsu Asano