Patents by Inventor Naoto Imawaka

Naoto Imawaka 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).

  • Patent number: 9214287
    Abstract: Providing a dye-sensitized solar cell having high durability and thermal resistance, and preventing elution of a platinum group catalyst from a catalytic electrode: by surface-treating the catalytic electrode with (a) a specific sulfur material having a molecular weight of 32 to 10,000 containing a sulfur atom having an oxidation number of ?2 to 0, (b) another specific sulfur material containing no sulfur atom having an oxidation number of ?2 to 0, but containing a sulfur atom having an oxidation number of +1 to +4 [with the proviso that the sulfur material (b) is such a material that a surface of the surface-treated catalyst electrode has a photoelectron peak within a binding energy range of 161 to 165 eV in an X-ray photoelectron spectrum], or (c) a mixture of the sulfur materials (a) and (b); and/or by adding the sulfur material into the electrolyte layer.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: December 15, 2015
    Assignee: SHIMANE PERFECTUAL GOVERNMENT
    Inventors: Naoto Imawaka, Kazuhiko Matsubayashi
  • Patent number: 9183992
    Abstract: Providing a dye-sensitized solar cell having high durability and thermal resistance, and preventing elution of a platinum group catalyst from a catalytic electrode: by surface-treating the catalytic electrode with (a) a specific sulfur material having a molecular weight of 32 to 10,000 containing a sulfur atom having an oxidation number of ?2 to 0, (b) another specific sulfur material containing no sulfur atom having an oxidation number of ?2 to 0, but containing a sulfur atom having an oxidation number of +1 to +4 [with the proviso that the sulfur material (b) is such a material that a surface of the surface-treated catalyst electrode has a photoelectron peak within a binding energy range of 161 to 165 eV in an X-ray photoelectron spectrum], or (c) a mixture of the sulfur materials (a) and (b); and/or by adding the sulfur material into the electrolyte layer.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: November 10, 2015
    Assignee: Shimane Prefectural Government
    Inventors: Naoto Imawaka, Kazuhiko Matsubayashi
  • Publication number: 20150179351
    Abstract: Providing a dye-sensitized solar cell having high durability and thermal resistance, and preventing elution of a platinum group catalyst from a catalytic electrode: by surface-treating the catalytic electrode with (a) a specific sulfur material having a molecular weight of 32 to 10,000 containing a sulfur atom having an oxidation number of ?2 to 0, (b) another specific sulfur material containing no sulfur atom having an oxidation number of ?2 to 0, but containing a sulfur atom having an oxidation number of +1 to +4 [with the proviso that the sulfur material (b) is such a material that a surface of the surface-treated catalyst electrode has a photoelectron peak within a binding energy range of 161 to 165 eV in an X-ray photoelectron spectrum], or (c) a mixture of the sulfur materials (a) and (b); and/or by adding the sulfur material into the electrolyte layer.
    Type: Application
    Filed: February 19, 2015
    Publication date: June 25, 2015
    Applicant: SHIMANE PREFECTURAL GOVERNMENT
    Inventors: Naoto IMAWAKA, Kazuhiko MATSUBAYASHI
  • Publication number: 20150179352
    Abstract: Providing a dye-sensitized solar cell having high durability and thermal resistance, and preventing elution of a platinum group catalyst from a catalytic electrode: by surface-treating the catalytic electrode with (a) a specific sulfur material having a molecular weight of 32 to 10,000 containing a sulfur atom having an oxidation number of ?2 to 0, (b) another specific sulfur material containing no sulfur atom having an oxidation number of ?2 to 0, but containing a sulfur atom having an oxidation number of +1 to +4 [with the proviso that the sulfur material (b) is such a material that a surface of the surface-treated catalyst electrode has a photoelectron peak within a binding energy range of 161 to 165 eV in an X-ray photoelectron spectrum 1, or (c) a mixture of the sulfur materials (a) and (b); and/or by adding the sulfur material into the electrolyte layer.
    Type: Application
    Filed: February 19, 2015
    Publication date: June 25, 2015
    Applicant: SHIMANE PREFECTURAL GOVERNMENT
    Inventors: Naoto IMAWAKA, Kazuhiko MATSUBAYASHI
  • Patent number: 8993880
    Abstract: Providing a dye-sensitized solar cell having high durability and thermal resistance, and preventing elution of a platinum group catalyst from a catalytic electrode: by surface-treating the catalytic electrode with (a) a specific sulfur material having a molecular weight of 32 to 10,000 containing a sulfur atom having an oxidation number of ?2 to 0, (b) another specific sulfur material containing no sulfur atom having an oxidation number of ?2 to 0, but containing a sulfur atom having an oxidation number of +1 to +4 [with the proviso that the sulfur material (b) is such a material that a surface of the surface-treated catalyst electrode has a photoelectron peak within a binding energy range of 161 to 165 eV in an X-ray photoelectron spectrum], or (c) a mixture of the sulfur materials (a) and (b); and/or by adding the sulfur material into the electrolyte layer.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: March 31, 2015
    Assignee: Shimane Prefectural Government
    Inventors: Naoto Imawaka, Kazuhiko Matsubayashi
  • Publication number: 20130125979
    Abstract: Providing a dye-sensitized solar cell having high durability and thermal resistance, and preventing elution of a platinum group catalyst from a catalytic electrode: by surface-treating the catalytic electrode with (a) a specific sulfur material having a molecular weight of 32 to 10,000 containing a sulfur atom having an oxidation number of -2 to 0, (b) another specific sulfur material containing no sulfur atom having an oxidation number of -2 to 0, but containing a sulfur atom having an oxidation number of +1 to +4 [with the proviso that the sulfur material (b) is such a material that a surface of the surface-treated catalyst electrode has a photoelectron peak within a binding energy range of 161 to 165 eV in an X-ray photoelectron spectrum], or (c) a mixture of the sulfur materials (a) and (b); and/or by adding the sulfur material into the electrolyte layer.
    Type: Application
    Filed: July 21, 2011
    Publication date: May 23, 2013
    Applicant: SHIMANE PREFECTURAL GOVERNMENT
    Inventors: Naoto Imawaka, Kazuhiko Matsubayashi
  • Patent number: 7763223
    Abstract: In a synthetic method for porous silica crystals through a hydrothermal reaction, a method for synthesizing porous silica crystals with a size of 0.5 mm or larger in high reproducibility and efficiency is provided using a method for manufacturing the porous silica crystals, wherein a high concentration area with silicon is formed as a partial area inside a hydrothermal synthesis vessel, and at least a part of a surface-smoothed bulk material is present in the high concentration area with silicon to perform the hydrothermal reaction, the bulk material comprising a compound containing both silicon and oxygen as a supply source for a part or a whole of the structure composition elements of the porous silica crystals.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: July 27, 2010
    Assignees: Shimane Prefectural Government, Shimane University
    Inventors: Shuji Noda, Takanobu Shiomura, Masahiro Tajima, Naoto Imawaka, Yasuaki Okamoto, Takeshi Kubota
  • Publication number: 20070248524
    Abstract: In a synthetic method for porous silica crystals through a hydrothermal reaction, a method for synthesizing porous silica crystals with a size of 0.5 mm or larger in high reproducibility and efficiency is provided using a method for manufacturing the porous silica crystals, wherein a high concentration area with silicon is formed as a partial area inside a hydrothermal synthesis vessel, and at least a part of a surface-smoothed bulk material is present in the high concentration area with silicon to perform the hydrothermal reaction, the bulk material comprising a compound containing both silicon and oxygen as a supply source for a part or a whole of the structure composition elements of the porous silica crystals.
    Type: Application
    Filed: September 12, 2005
    Publication date: October 25, 2007
    Applicants: SHIMANE PREFECTURAL GOVERNMENT, SHIMANE UNIVERSITY
    Inventors: Shuji Noda, Takanobu Shiomura, Masahiro Tajima, Naoto Imawaka, Yasuaki Okamoto, Takeshi Kubota