Patents by Inventor Keizo Ikai

Keizo Ikai 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: 8993478
    Abstract: The present invention provides a method for producing an activated carbon for an electric double layer capacitor, with which the wettability of a carbon material with an alkali activator is improved, thereby improving contact efficiency between the carbon material and the alkali activator and efficiently promoting reaction between the carbon material, which is a starting material and the activator. The method comprises adjusting a carbon material as it is or after having been calcined to produce a carbon powder having an average particle diameter of 0.5 to 15 ?m, oxidizing the carbon powder to contain 3 percent by mass or more of oxygen, and activating the oxidized product with an alkali activator.
    Type: Grant
    Filed: December 24, 2010
    Date of Patent: March 31, 2015
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Masaki Fujii, Noriyuki Kiuchi, Shinya Taguchi, Keizo Ikai
  • Patent number: 8858654
    Abstract: Provided is a method for producing an activated carbon for an electric double layer capacitor electrode comprising adjusting a carbon material (including a calcined product of a carbon material) in particle size, followed by mixing the carbon material with an alkali activator, and then activating the mixture, wherein the mixing is carried out so that the particle size distribution composed of particles with a size of 300 ?m or greater in the mixture of the carbon material and alkali activator is 5 percent or less so that the mixing state of the carbon material and alkali activator can be improved, resulting in a reduction in the ratio of the alkali activator.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: October 14, 2014
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Masaki Fujii, Keizo Ikai, Noriyuki Kiuchi, Kunihiko Satou, Shinya Taguchi
  • Patent number: 8664155
    Abstract: The present invention provides a process for producing an activated carbon having a small average particle diameter, a uniform particle size and a relatively large specific surface area suitable for an electric double layer capacitor electrode, in an easy and cost effective manner. The process comprises calcining an easily graphitizable carbon material such as petroleum coke or coal coke, used as the raw material under an oxidizing gas atmosphere, adjusting the particle size of the carbon material, and then activating the carbon material. The use of the activated carbon produced by the process of the present invention in an electrode can provide an electric double layer capacitor having a large capacitance per unit volume.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 4, 2014
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Masaki Fujii, Shinya Taguchi, Yutaka Sanokawa, Keizo Ikai
  • Publication number: 20130027845
    Abstract: Provided is a method for producing an activated carbon for an electric double layer capacitor electrode comprising adjusting a carbon material (including a calcined product of a carbon material) in particle size, followed by mixing the carbon material with an alkali activator, and then activating the mixture, wherein the mixing is carried out so that the particle size distribution composed of particles with a size of 300 ?m or greater in the mixture of the carbon material and alkali activator is 5 percent or less so that the mixing state of the carbon material and alkali activator can be improved, resulting in a reduction in the ratio of the alkali activator.
    Type: Application
    Filed: March 11, 2011
    Publication date: January 31, 2013
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Masaki Fujii, Keizo Ikai, Noriyuki Kiuchi, Kunihiko Satou, Shinya Taguchi
  • Publication number: 20120275988
    Abstract: The present invention provides a method for producing an activated carbon for an electric double layer capacitor, with which the wettability of a carbon material with an alkali activator is improved, thereby improving contact efficiency between the carbon material and the alkali activator and efficiently promoting reaction between the carbon material, which is a starting material and the activator. The method comprises adjusting a carbon material as it is or after having been calcined to produce a carbon powder having an average particle diameter of 0.5 to 15 ?m, oxidizing the carbon powder to contain 3 percent by mass or more of oxygen, and activating the oxidized product with an alkali activator.
    Type: Application
    Filed: December 24, 2010
    Publication date: November 1, 2012
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Masaki Fujii, Noriyuki Kiuchi, Shinya Taguchi, Keizo Ikai
  • Patent number: 8284540
    Abstract: The present invention provides a process of producing an activated carbon for an electric double layer capacitor, which can produce easily and inexpensively an activated carbon free from fusing of carbon particles during activation and having a small diameter, a uniform particle diameter, and a relatively large specific surface area on a commercial scale. The process comprises the steps of calcining an easily graphitizable carbon material so that the reduction rates of the hydrogen/carbon atomic ratio (H/C) and the volatile components in the carbon material are 4 percent or more and 5 percent or more, respectively after calcination and activating the carbon material thereby producing an activated carbon for an electric double layer capacitor, having an average particle diameter of 0.5 to 7 ?m and a BET specific surface area of 1500 to 3000 m2/g.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: October 9, 2012
    Assignee: Nippon Oil Corporation
    Inventors: Masaki Fujii, Shinya Taguchi, Keizo Ikai, Hiroshi Kato, Kazuhiro Igarashi, Noriyuki Kiuchi, Tsutomu Nakamura, Kiwamu Takeshita
  • Publication number: 20110160038
    Abstract: The present invention provides a process for producing an activated carbon having a small average particle diameter, a uniform particle size and a relatively large specific surface area suitable for an electric double layer capacitor electrode, in an easy and cost effective manner. The process comprises calcining an easily graphitizable carbon material such as petroleum coke or coal coke, used as the raw material under an oxidizing gas atmosphere, adjusting the particle size of the carbon material, and then activating the carbon material. The use of the activated carbon produced by the process of the present invention in an electrode can provide an electric double layer capacitor having a large capacitance per unit volume.
    Type: Application
    Filed: September 11, 2009
    Publication date: June 30, 2011
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Masaki Fujii, Shinya Taguchi, Yutaka Sanokawa, Keizo Ikai
  • Publication number: 20100214722
    Abstract: The present invention provides a process of producing an activated carbon for an electric double layer capacitor, which can produce easily and inexpensively an activated carbon free from fusing of carbon particles during activation and having a small diameter, a uniform particle diameter, and a relatively large specific surface area on a commercial scale. The process comprises the steps of calcining an easily graphitizable carbon material so that the reduction rates of the hydrogen/carbon atomic ratio (H/C) and the volatile components in the carbon material are 4 percent or more and 5 percent or more, respectively after calcination and activating the carbon material thereby producing an activated carbon for an electric double layer capacitor, having an average particle diameter of 0.5 to 7 ?m and a BET specific surface area of 1500 to 3000 m2/g.
    Type: Application
    Filed: July 3, 2008
    Publication date: August 26, 2010
    Applicant: NIPPON OIL CORPORATION
    Inventors: Masaki Fujii, Shinya Taguchi, Keizo Ikai, Hiroshi Kato, Kazuhiro Igarashi, Noriyuki Kiuchi, Tsutomu Nakamura, Kiwamu Takeshita
  • Patent number: 7754178
    Abstract: The capacitance per volume of an electric double-layer capacitor can be increased by using a raw-material carbon composition for use in a carbon material for an electrode of the electric double-layer capacitor by applying an activation process, characterized in that the raw-material carbon composition has a volatile content of 1.3% by mass to 15% by mass (both inclusive), and microstrength of 5 to 30% when the volatile content is less than 6% by mass while microstrength of 5 to 20% when the volatile content is 6% or more.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: July 13, 2010
    Assignee: Nippon Oil Corporation
    Inventors: Tamotsu Tano, Takashi Oyama, Hideki Ono, Keizo Ikai, Kiwamu Takeshita
  • Patent number: 7564676
    Abstract: A method for producing activated carbon for electrodes of electric double layer capacitors is disclosed which comprises an activation step wherein activated carbon is obtained by mixing an alkali metal hydroxide with a carbon raw material for the activated carbon and heating the mixture in an inert gas atmosphere, a deactivation removal step wherein the alkali metal in the activated carbon is deactivated and removed, and a heat treatment step wherein the activated carbon having gone through the deactivation removal step is heated in an inert gas atmosphere at a temperature higher than 400° C. but not higher than the heating temperature in the activation step.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: July 21, 2009
    Assignee: Nippon Oil Corporation
    Inventors: Eiji Kitajima, Yuichi Nakano, Kiwamu Takeshita, Keizo Ikai, Tatsuji Maruyama, Hideki Ono, Haruyoshi Mizuta
  • Publication number: 20070258189
    Abstract: The capacitance per volume of an electric double-layer capacitor can be increased by using a raw-material carbon composition for use in a carbon material for an electrode of the electric double-layer capacitor by applying an activation process, characterized in that the raw-material carbon composition has a volatile content of 1.3% by mass to 15% by mass (both inclusive), and microstrength of 5 to 30% when the volatile content is less than 6% by mass while microstrength of 5 to 20% when the volatile content is 6% or more.
    Type: Application
    Filed: August 12, 2005
    Publication date: November 8, 2007
    Inventors: Tamotsu Tano, Takashi Oyama, Hideki Ono, Keizo Ikai, Kiwamu Takeshita
  • Publication number: 20070041147
    Abstract: A method for producing activated carbon for electrodes of electric double layer capacitors is disclosed which comprises an activation step wherein activated carbon is obtained by mixing an alkali metal hydroxide with a carbon raw material for the activated carbon and heating the mixture in an inert gas atmosphere, a deactivation removal step wherein the alkali metal in the activated carbon is deactivated and removed, and a heat treatment step wherein the activated carbon having gone through the deactivation removal step is heated in an inert gas atmosphere at a temperature higher than 400° C. but not higher than the heating temperature in the activation step.
    Type: Application
    Filed: October 18, 2004
    Publication date: February 22, 2007
    Inventors: Eiji Kitajima, Yuichi Nakano, Kiwamu Takeshita, Keizo Ikai, Tatsuji Maruyama, Hideki Ono, Haruyoshi Mizuta
  • Patent number: 7105612
    Abstract: The process of the present invention can easily produce a solid polymer electrolyte having a high ion conductivity, by reacting an acrylic copolymer comprising structural units represented by the following formulas (I) and (II) with a compound represented by formula (III) Y—R—Y, provided that in formulas (II) and (III), X and Y are a combination of an isocyanate group and a hydroxyl group, thereby being solidified
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: September 12, 2006
    Assignee: Nippon Oil Corporation
    Inventors: Yoshinori Nishikitani, Masaaki Kobayashi, Keizo Ikai, Tsuyoshi Asano
  • Patent number: 6867894
    Abstract: A conventional electrochromic mirror comprises an ion conductive layer provided between a transparent electrically conductive substrate and a reflective electrically conductive substrate and containing spacers. The spacers can be perceived when the mirror was viewed. According to the present invention, the difference in refraction index between the spacers and the ion conductive layer is ±0.03 or less. Therefore, the electrochromic mirror having spacers in the ion conductive layer which are hardly perceived can be provided.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: March 15, 2005
    Assignees: Nippon Oil Corporation, Kabushiki Kaisha Honda Lock
    Inventors: Tsuyoshi Asano, Keizo Ikai, Yoshinori Nishikitani
  • Patent number: 6814451
    Abstract: In an antiglare mirror apparatus mounted inside a vehicle compartment a mirror member is an electrochromic element comprising an antiglare material including an electrochromic layer, a light transmission electrode material and a light reflective electrode material where the light transmission electrode material and the light reflective electrode material are positioned on both sides of the antiglare material and a control circuit controls a drive-electric energy to the electrochromic element based upon a driving electric signal of a signal generator wherein the mirror member is detachably mounted to a facility in a vehicle compartment so that a holder holds the mirror member and the mirror member covers a pre-mounted inner mirror.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: November 9, 2004
    Assignee: Nippn Oil Corporation
    Inventors: Yoshinori Nishikitani, Masaaki Kobayashi, Keizo Ikai, Tsuyoshi Asano
  • Publication number: 20040059016
    Abstract: The process of the present invention can easily produce a solid polymer electrolyte having a high ion conductivity, by reacting an acrylic copolymer comprising structural units represented by the following formulas (I) and (II) with a compound represented by formula (III) Y—R—Y, provided that in formulas (II) and (III), X and Y are a combination of an isocyanate group and a hydroxyl group, thereby being solidified.
    Type: Application
    Filed: September 16, 2003
    Publication date: March 25, 2004
    Applicant: Nippon Oil Corporation
    Inventors: Yoshinori Nishikitani, Masaaki Kobayashi, Keizo Ikai, Tsuyoshi Asano
  • Publication number: 20040027673
    Abstract: In an antiglare mirror apparatus mounted inside a vehicle compartment a mirror member is an electrochromic element comprising an antiglare material including an electrochromic layer, a light transmission electrode material and a light reflective electrode material where the light transmission electrode material and the light reflective electrode material are positioned on both sides of the antiglare material and a control circuit controls a drive-electric energy to the electrochromic element based upon a driving electric signal of a signal generator wherein the mirror member is detachably mounted to a facility in a vehicle compartment so that a holder holds the mirror member and the mirror member covers a pre-mounted inner mirror.
    Type: Application
    Filed: August 4, 2003
    Publication date: February 12, 2004
    Applicants: Nippon Oil Corporation, Kabusiki Kaisha Honda Lock
    Inventors: Yoshinori Nishikitani, Masaaki Kobayashi, Keizo Ikai, Tsuyoshi Asano
  • Publication number: 20030161025
    Abstract: A conventional electrochromic mirror comprises an ion conductive layer provided between a transparent electrically conductive substrate and a reflective electrically conductive substrate and containing spacers. The spacers can be perceived when the mirror was viewed. According to the present invention, the difference in refraction index between the spacers and the ion conductive layer is ±0.03 or less. Therefore, the electrochromic mirror having spacers in the ion conductive layer which are hardly perceived can be provided.
    Type: Application
    Filed: February 27, 2003
    Publication date: August 28, 2003
    Applicant: Nippon Oil Corporation
    Inventors: Tsuyoshi Asano, Keizo Ikai, Yoshinori Nishikitani
  • Patent number: 6606183
    Abstract: A method for producing a cell for an electrochromic mirror which comprises a step of applying a epoxy-based sealant containing beads by a method selected from the group consisting of dispensing or screen-printing on a predetermined position of the surface peripheral edge of at least one of two electrically conductive substrates; and a step of superposing the two substrates such that the width of the applied sealant is made 2 mm or less.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: August 12, 2003
    Assignees: Nippon Oil Corporation, Kabushiki Kaisha Honda Lock
    Inventors: Keizo Ikai, Tsuyoshi Asano, Masaaki Kobayashi, Yoshinori Nishikitani
  • Patent number: 6535322
    Abstract: An electrochromic mirror includes a transparent conductive substrate, a reflective conductive substrate, and an ion conductive layer disposed between the transparent conductive substrate and reflective conductive substrate. A highly conductive layer is provided on a conductive surface of at least one of the conductive substrates on a portion of the surface near its peripheral edge. The highly conductive layer has a smaller resistance than the surface resistance of the conductive surface upon which it is disposed.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: March 18, 2003
    Assignee: Nippon Mitsubishi Oil Corporation
    Inventors: Tsuyoshi Asano, Keizo Ikai, Yoshinori Nishikitani