Patents by Inventor Kenji Naoi

Kenji Naoi 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: 20190259545
    Abstract: Provided is an electrode which gives an electric storage device that has high energy density and good cycle life. This electrode for an electric storage device is characterized by having an active material layer that contains: an electrode active material particle; and a paste-like conductive carbon that is derived from an oxidized carbon obtained by giving an oxidizing treatment to a carbon raw material with an inner vacancy and covers a surface of the electrode active material particle. The paste-like conductive carbon derived from the oxidized carbon is densely filled not only into a gap that is formed between the electrode active material particles adjacent to each other but also into a pore that exists on the surface of the active material particle, so that the electrode density is increased, thereby improving the energy density of the electric storage device.
    Type: Application
    Filed: May 2, 2019
    Publication date: August 22, 2019
    Applicant: NIPPON CHEMI-CON CORPORATION
    Inventors: Satoshi KUBOTA, Yoshihiro MINATO, Shuichi ISHIMOTO, Kenji TAMAMITSU, Masaki KOIKE, Noriyuki MIYAMOTO, Masashi OTSUKA, Sekihiro TAKEDA, Katsuhiko NAOI, Wako NAOI
  • Publication number: 20190245209
    Abstract: Provided is conductive carbon that gives an electrical storage device having a high energy density. This conductive carbon includes a hydrophilic part, and the contained amount of the hydrophilic part is 10 mass % or more of the entire conductive carbon. When performing a rolling treatment on an active material layer including an active material particle and this conductive carbon formed on a current collector during manufacture of an electrode of an electric storage device, the pressure resulting from the rolling treatment causes this conductive carbon to spread in a paste-like form and increase in density. The active material particles approach each other, and the conductive carbon is pressed into gaps formed between adjacent active material particles, filling the gaps. As a result, the amount of active material per unit volume in the electrode obtained after the rolling treatment increases, and the electrode density increases.
    Type: Application
    Filed: April 18, 2019
    Publication date: August 8, 2019
    Applicant: NIPPON CHEMI-CON CORPORATION
    Inventors: Satoshi KUBOTA, Yoshihiro MINATO, Shuichi ISHIMOTO, Kenji TAMAMITSU, Katsuhiko NAOI, Wako NAOI
  • Patent number: 10374222
    Abstract: Provided is an electrode material which leads to a lithium ion secondary battery that has high energy density. An electrode material for a lithium ion secondary battery of the present invention is characterized by containing: a coarse particle of a first active material that is able to act as a positive electrode active material or a negative electrode active material of a lithium ion secondary battery; and a particle of a composite composed of conductive carbon and a second active material attached to the conductive carbon that is able to act as an active material of the same electrode as the first active material. This electrode material for a lithium ion secondary battery is also characterized in that: a diameter of the coarse particle of the first active material is larger than a diameter of the particle of the composite; and the particle of the composite is filled in a gap formed between the particles of the first active material. A conductive agent can be additionally contained in the gap.
    Type: Grant
    Filed: September 2, 2013
    Date of Patent: August 6, 2019
    Assignee: NIPPON CHEMI-CON CORPORATION
    Inventors: Katsuhiko Naoi, Wako Naoi, Satoshi Kubota, Yoshihiro Minato, Shuichi Ishimoto, Kenji Tamamitsu
  • Patent number: 10332692
    Abstract: Provided is an electrode which gives an electric storage device that has high energy density and good cycle life. This electrode for an electric storage device is characterized by having an active material layer that contains: an electrode active material particle; and a paste-like conductive carbon that is derived from an oxidized carbon obtained by giving an oxidizing treatment to a carbon raw material with an inner vacancy and covers a surface of the electrode active material particle. The paste-like conductive carbon derived from the oxidized carbon is densely filled not only into a gap that is formed between the electrode active material particles adjacent to each other but also into a pore that exists on the surface of the active material particle, so that the electrode density is increased, thereby improving the energy density of the electric storage device.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: June 25, 2019
    Assignee: NIPPON CHEMI-CON CORPORATION
    Inventors: Satoshi Kubota, Yoshihiro Minato, Shuichi Ishimoto, Kenji Tamamitsu, Masaki Koike, Noriyuki Miyamoto, Masashi Otsuka, Sekihiro Takeda, Katsuhiko Naoi, Wako Naoi
  • Publication number: 20190096551
    Abstract: The invention provides a core-shell particle which can provide, by being calcinated, epsilon type iron oxide-based compound particles that have a small coefficient of variation of primary particle diameter and show excellent SNR and running durability when employed in a magnetic recording medium as well as applications thereof. The core-shell particle includes: a core including at least one iron oxide selected from Fe2O3 or Fe3O4, or iron oxyhydroxide; and a shell that coats the core, the shell including a polycondensate of a metal alkoxide and a metal element other than iron, as well as applications thereof.
    Type: Application
    Filed: September 17, 2018
    Publication date: March 28, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Kenji NAOI, Masashi SHIRATA, Takashi FUJIMOTO
  • Publication number: 20180366152
    Abstract: Provided is hexagonal strontium ferrite powder for magnetic recording, in which an activation volume is 800 to 1,500 nm3, a content of rare earth atom with respect to 100 atom % of iron atom is 0.5 to 5.0 atom %, and a rare earth atom surface portion uneven distribution is provided.
    Type: Application
    Filed: June 14, 2018
    Publication date: December 20, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Kenji NAOI, Masashi SHIRATA
  • Publication number: 20180358155
    Abstract: A core-shell particle includes: a core including an iron oxyhydroxide compound represented by Formula A3a3Fe1?a3OOH (in which A3 represents at least one metal element other than Fe, and a3 satisfies 0<a3<1) or at least one iron oxide compound selected from the group consisting of Fe2O3, a compound represented by Formula A1a1Fe2?a1O3 (in which A1 represents at least one metal element other than Fe, and a1 satisfies 0<a1<2), Fe3O4, and a compound represented by Formula A2a2Fe3?a2O4 (in which A2 represents at least one metal element other than Fe, and a2 satisfies 0<a2<2); and a shell which covers the core and includes a polycondensate of a metal alkoxide.
    Type: Application
    Filed: May 9, 2018
    Publication date: December 13, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Kenji NAOI, Takashi FUJIMOTO, Masashi SHIRATA
  • Publication number: 20180358043
    Abstract: A magnetic recording medium includes: a non-magnetic support; and a magnetic layer including a binding agent and a ferromagnetic powder including at least one epsilon-type iron oxide compound selected from the group consisting of ?-Fe2O3 and compound represented by Formula (1) (A represents at least one metal element other than Fe, and a satisfies 0<a<2), in which a value of magnetic field Hc with respect to magnetic field Hc? is from 0.6 to 1.0, and Hc? satisfies Expression (II): 119 kA/m<Hc?<2380 kA/m. The magnetic field Hc? is a magnetic field when the value of Expression (I): d2M/dH2 is zero, wherein a magnetization M, which is obtained by a magnetic field-magnetization curve obtained by measurement under specific conditions, is subjected to second derivative with respect to an applied magnetic field H, and magnetic field Hc is a magnetic field when the magnetization is zero in the curve.
    Type: Application
    Filed: May 23, 2018
    Publication date: December 13, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Kenji NAOI, Takashi FUJIMOTO, Masashi SHIRATA
  • Patent number: 10133414
    Abstract: The invention provides a layered body for a touch panel in which metal migration is suppressed and changes in the electrical resistance of a fine metal wire are suppressed, and a touch panel. The layered body for a touch panel of the invention is a layered body for a touch panel including a substrate, fine metal wires which are disposed on the substrate, and an adhesive layer which is disposed on the fine metal wires, in which the amount of the metal contained per unit area in the fine metal wire is in a range of 0.01 g/m2 to 10 g/m2, the adhesive layer contains a benzotriazole-based compound, and the content of the benzotriazole-based compound is in a range of 0.05 mass % to 1.5 mass % with respect to the total mass of the adhesive layer.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: November 20, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Kenji Naoi, Toshiaki Hayashi
  • Patent number: 10085346
    Abstract: Provided is a method for producing a conductive member including: forming a first silver halide emulsion layer, a light absorption layer, and a second silver halide emulsion layer on a transparent support in this order; performing pattern exposure on the first silver halide emulsion layer; and the second silver halide emulsion layer and applying a development treatment thereto to obtain a conductive layer comprising a thin metal wire, in which the light absorption layer absorbs at least some of the wavelengths of light to which the first silver halide emulsion layer or the second silver halide emulsion layer is exposed.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: September 25, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Kenichi Yamamoto, Naoharu Kiyoto, Kenji Naoi
  • Publication number: 20170355173
    Abstract: An object of the present invention is to provide a pressure-sensitive adhesive sheet for a touch panel which is excellent for the operability of a capacitance-type touch panel, which is able to suppress the occurrence of malfunctions in a capacitance-type touch panel in a wide range of temperature environments from low temperatures to high temperatures, and which is also excellent in pressure-sensitive adhesion. In addition, another object of the present invention is to provide a laminate for a touch panel and a capacitance-type touch panel which include a pressure-sensitive adhesive sheet for a touch panel. In the pressure-sensitive adhesive sheet for a touch panel of the present invention, a relative dielectric constant obtained by impedance measurement at 1 MHz at 20° C. is 4.0 or more, a temperature dependency obtained from a temperature dependency evaluation test is 25% or less, and a 180 degree peel strength with respect to glass is 0.2 to 1.2 N/mm.
    Type: Application
    Filed: August 1, 2017
    Publication date: December 14, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Satoshi TANAKA, Kenji NAOI
  • Publication number: 20160345439
    Abstract: Provided is a method for producing a conductive member including: forming a first silver halide emulsion layer, a light absorption layer, and a second silver halide emulsion layer on a transparent support in this order; performing pattern exposure on the first silver halide emulsion layer; and the second silver halide emulsion layer and applying a development treatment thereto to obtain a conductive layer comprising a thin metal wire, in which the light absorption layer absorbs at least some of the wavelengths of light to which the first silver halide emulsion layer or the second silver halide emulsion layer is exposed.
    Type: Application
    Filed: August 4, 2016
    Publication date: November 24, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Kenichi YAMAMOTO, Naoharu KIYOTO, Kenji NAOI
  • Patent number: 9491858
    Abstract: This wiring board is provided with: a plurality of metal wires disposed upon an insulating substrate; and a transparent adhesive agent layer which is disposed upon the metal wires, and which is in direct contact with the metal wires. The metal wires include: a first metal wire which has a pulse signal supplied thereto; and a second metal wire which has a fixed electric potential applied thereto. The pulse signal has a reference level identical to the fixed electric potential, and has a pulse train in which a plurality of pulses having a pulse width of not more than 3 msec are arranged, the integral time of the pulses in a period of 600 seconds being less than 60 seconds.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: November 8, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Yasushi Endo, Nobuyuki Tada, Kenji Naoi, Tomohito Asai, Hideo Ikeda, Michihiro Shibata
  • Publication number: 20160132183
    Abstract: The invention provides a layered body for a touch panel in which metal migration is suppressed and changes in the electrical resistance of a fine metal wire are suppressed, and a touch panel. The layered body for a touch panel of the invention is a layered body for a touch panel including a substrate, fine metal wires which are disposed on the substrate, and an adhesive layer which is disposed on the fine metal wires, in which the amount of the metal contained per unit area in the fine metal wire is in a range of 0.01 g/m2 to 10 g/m2, the adhesive layer contains a benzotriazole-based compound, and the content of the benzotriazole-based compound is in a range of 0.05 mass % to 1.5 mass % with respect to the total mass of the adhesive layer.
    Type: Application
    Filed: January 5, 2016
    Publication date: May 12, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Kenji Naoi, Toshiaki Hayashi
  • Publication number: 20160014894
    Abstract: This wiring board is provided with: a plurality of metal wires disposed upon an insulating substrate; and a transparent adhesive agent layer which is disposed upon the metal wires, and which is in direct contact with the metal wires. The metal wires include: a first metal wire which has a pulse signal supplied thereto; and a second metal wire which has a fixed electric potential applied thereto. The pulse signal has a reference level identical to the fixed electric potential, and has a pulse train in which a plurality of pulses having a pulse width of not more than 3 msec are arranged, the integral time of the pulses in a period of 600 seconds being less than 60 seconds.
    Type: Application
    Filed: September 25, 2015
    Publication date: January 14, 2016
    Inventors: YASUSHI ENDO, NOBUYUKI TADA, KENJI NAOI, TOMOHITO ASAI, HIDEO IKEDA, MICHIHIRO SHIBATA
  • Patent number: 8883045
    Abstract: The present invention provides a metal nanowire-containing composition containing at a least metal nanowire and a heterocyclic compound having an interaction potential of less than ?1 mV.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: November 11, 2014
    Assignee: Fujifilm Corporation
    Inventors: Yoichi Hosoya, Naoharu Kiyoto, Nori Miyagishima, Takeshi Funakubo, Kenji Naoi, Ryoji Nishimura
  • Publication number: 20140246629
    Abstract: The present invention provides metal nanowires containing at least metal nanowires having a diameter of 50 nm or less and a major axis length of 5 ?m or more in an amount of 50% by mass or more in terms of metal amount with respect to total metal particles.
    Type: Application
    Filed: May 15, 2014
    Publication date: September 4, 2014
    Applicant: FUJIFILM Corporation
    Inventors: Nori MIYAGISHIMA, Ryoji NISHIMURA, Yoichi HOSOYA, Takeshi FUNAKUBO, Kenji NAOI
  • Publication number: 20140110638
    Abstract: The method for manufacturing a conductive film includes cleaning a metal nanowire dispersion, which contains metal nanowires with an average short axis length of 150 nm or less as metal particles and a dispersing agent by performing ultrafiltration using an ultrafiltration film, and coating a coating liquid for forming a conductive film, which contains the metal nanowire dispersion after cleaning, onto a support, where the content ({mass of the dispersing agent/(mass of all metal particles+mass of the dispersing agent)}×100) of the dispersing agent in the metal nanowire dispersion after cleaning is 3.2 mass % or more.
    Type: Application
    Filed: December 30, 2013
    Publication date: April 24, 2014
    Applicant: Fujifilm Corporation
    Inventors: Nori MIYAGISHIMA, Shinichi NAKAHIRA, Kenji NAOI
  • Publication number: 20140034360
    Abstract: A conductive member containing: a base material; a conductive layer provided on the base material, wherein the conductive layer includes a metallic nanowire having an average short axis length of 150 nm or less and a matrix; and a protective layer including a three-dimensional crosslinked structure represented by the following Formula (I), sequentially in this order, and which has a surface resistivity measured at a surface of the protective layer of 1,000 ?/? or less, a production method of the conductive member, and a touch panel and a solar cell, each of which uses the conductive member. The conductive member may provide high resistance against scratches and abrasion, excellent conductivity, excellent transparency, excellent heat resistance, excellent moisture and heat resistance, and excellent bendability. -M1-O-M1-??Formula (I): In the Formula (I), M1 represents an element selected from the group consisting of Si, Ti Zr and Al.
    Type: Application
    Filed: October 9, 2013
    Publication date: February 6, 2014
    Applicant: FUJIFILM Corporation
    Inventors: Satoshi TANAKA, Kenji NAOI, Shinichi NAKAHIRA, Kenichi YAMAMOTO
  • Patent number: 8349467
    Abstract: The present invention provides metal nanowires including at least silver, and a metal other than silver, wherein the metal other than silver has a standard electrode potential more positive than the standard electrode potential of silver, and the metal nanowires have a long-axis length of 1 ?m or more and a short-axis length of 300 nm or less.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: January 8, 2013
    Assignee: FUJIFILM Corporation
    Inventor: Kenji Naoi