Patents by Inventor Hitoshi Nakajima

Hitoshi Nakajima 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: 11393196
    Abstract: An assistance device enabling communication with a wearable device includes: a memory; and a processor including hardware, the processor being configured to acquire line-of-sight information about a line of sight of a user wearing the wearable device, based on the line-of-sight information, generate blind region state information indicating a state of a blind region shielded by a shielding object in a visual field region of the user, and output the blind region state information to the wearable device.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: July 19, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuhiro Itoh, Hitoshi Kumon, Shuntaro Shinohara, Yoshitaka Fuwamoto, Shioya Kageyama, Shintaro Inoue, Kiyofumi Nakajima
  • Patent number: 10998556
    Abstract: The present invention relates to a catalyst for a solid polymer fuel cell, including platinum, cobalt, and zirconium supported as a catalytic metal on a carbon powder carrier, in which the supporting ratio of platinum, cobalt, and zirconium on the carbon powder carrier is Pt:Co:Zr=3:0.5 to 1.5:0.1 to 3.0 by molar ratio. In the present invention, it is preferable that the peak position of Pt3Co seen in the X-ray diffraction pattern of catalyst particles is 2?=41.10° or more and 42.00° or less, and moderate alloying has occurred in the catalytic metal.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: May 4, 2021
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Wataru Hashimoto, Tatsunori Namai, Minoru Ishida, Hitoshi Nakajima, Kazuki Okaya, Takeshi Kaieda, Koichi Matsutani
  • Patent number: 10562018
    Abstract: Provided is a catalyst that can exhibit high activity. The catalyst is an electrode catalyst having catalytic metals supported on a catalyst support, in which the catalytic metals include platinum and a metal component other than platinum; the electrode catalyst has mesopores having a mode radius of pore distribution of mesopores having a radius of 1 nm or more, of 1 nm or more and less than 2.5 nm; alloy microparticles of platinum and the metal component other than platinum are supported inside the mesopores; and a molar content ratio of platinum with respect to the metal component other than platinum in the alloy microparticles supported inside the mesopores is 1.0 to 10.0.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: February 18, 2020
    Assignees: NISSAN MOTOR CO., LTD., TANAKA KIKINZOKU KOGYO K.K., NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Yoshinori Suzue, Kazuki Arihara, Tetsuya Mashio, Hiroyuki Tanaka, Katsuichiro Hayakawa, Koichi Matsutani, Hitoshi Nakajima
  • Publication number: 20190336956
    Abstract: Provided is a catalyst that can exhibit high activity. The catalyst is an electrode catalyst having catalytic metals supported on a catalyst support, in which the catalytic metals include platinum and a metal component other than platinum; the electrode catalyst has mesopores having a mode radius of pore distribution of mesopores having a radius of 1 nm or more, of 1 nm or more and less than 2.5 nm; alloy microparticles of platinum and the metal component other than platinum are supported inside the mesopores; and a molar content ratio of platinum with respect to the metal component other than platinum in the alloy microparticles supported inside the mesopores is 1.0 to 10.0.
    Type: Application
    Filed: April 6, 2017
    Publication date: November 7, 2019
    Applicants: NISSAN MOTOR CO., LTD., TANAKA KIKINZOKU KOGYO K.K., NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Yoshinori SUZUE, Kazuki ARIHARA, Tetsuya MASHIO, Hiroyuki TANAKA, Katsuichiro HAYAKAWA, Koichi MATSUTANI, Hitoshi NAKAJIMA
  • Publication number: 20190221858
    Abstract: The present invention relates to a catalyst for a solid polymer fuel cell, including platinum, cobalt, and zirconium supported as a catalytic metal on a carbon powder carrier, in which the supporting ratio of platinum, cobalt, and zirconium on the carbon powder carrier is Pt:Co:Zr=3:0.5 to 1.5:0.1 to 3.0 by molar ratio. In the present invention, it is preferable that the peak position of Pt3Co seen in the X-ray diffraction pattern of catalyst particles is 2?=41.10° or more and 42.00° or less, and moderate alloying has occurred in the catalytic metal.
    Type: Application
    Filed: September 7, 2017
    Publication date: July 18, 2019
    Inventors: Wataru HASHIMOTO, Tatsunori NAMAI, Minoru ISHIDA, Hitoshi NAKAJIMA, Kazuki OKAYA, Takeshi KAIEDA, Koichi MATSUTANI
  • Patent number: 9960431
    Abstract: Provided is a catalyst for solid polymer fuel cell that exhibits excellent initial activity and favorable durability and a method for manufacturing the same. The invention is a catalyst for solid polymer fuel cell which is formed by supporting catalyst particles including platinum, cobalt and manganese on a carbon powder carrier, wherein a composition ratio (molar ratio) among platinum, cobalt and manganese in the catalyst particles is Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, a peak intensity ratio of a Co—Mn alloy appearing in the vicinity of 2?=27° is 0.15 or less with respect to a main peak appearing in the vicinity of 2?=40° in X-ray diffraction analysis of the catalyst particles, and a fluorine compound having a C—F bond is supported at least on the surface of the catalyst particles. The amount of the fluorine compound supported is preferably from 3 to 20% with respect to the entire mass of the catalyst.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: May 1, 2018
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Minoru Ishida, Hitoshi Nakajima, Koichi Matsutani
  • Patent number: 9368805
    Abstract: The present invention provides a catalyst for a polymer electrolyte fuel cell including catalyst particles made of platinum supported on a carbon powder carrier, wherein the carbon powder carrier includes 0.7 to 3.0 mmol/g (based on the weight of the carrier) of a hydrophilic group bonded thereto; and the platinum particles have an average particle size of 3.5 to 8.0 nm and the platinum specific surface area based on CO adsorption (COMSA) of 40 to 100 m2/g. The catalyst for a polymer electrolyte fuel cell according to the present invention is a catalyst excellent in initial activity and satisfactory in durability.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: June 14, 2016
    Assignee: TANAKA KIKINZOKU KOGYO K.K
    Inventors: Tomoyuki Tada, Koichi Matsutani, Takeshi Kaieda, Katsuichiro Hayakawa, Hitoshi Nakajima
  • Publication number: 20160013495
    Abstract: Provided is a catalyst for solid polymer fuel cell that exhibits excellent initial activity and favorable durability and a method for manufacturing the same. The invention is a catalyst for solid polymer fuel cell which is formed by supporting catalyst particles including platinum, cobalt and manganese on a carbon powder carrier, wherein a composition ratio (molar ratio) among platinum, cobalt and manganese in the catalyst particles is Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, a peak intensity ratio of a Co—Mn alloy appearing in the vicinity of 2?=27° is 0.15 or less with respect to a main peak appearing in the vicinity of 2?=40° in X-ray diffraction analysis of the catalyst particles, and a fluorine compound having a C—F bond is supported at least on the surface of the catalyst particles. The amount of the fluorine compound supported is preferably from 3 to 20% with respect to the entire mass of the catalyst.
    Type: Application
    Filed: February 12, 2014
    Publication date: January 14, 2016
    Inventors: Minoru ISHIDA, Hitoshi NAKAJIMA, Koichi MATSUTANI
  • Patent number: 8977094
    Abstract: An optical fiber comprising a first core, a second core, a third core, and a cladding, wherein with a refractive index of the cladding as a reference, ?1 is a maximum value of a relative refractive index difference of the first core, ?2 is a maximum value of a relative refractive index difference of the second core, ?3 is a minimum value of a relative refractive index difference of the third core, “a” is a half-value radial width for the relative refractive index difference (?1??2) of the first core, “b” is a radius of a second core/third core boundary, and “c” is a radius of a third core/cladding boundary, the expressions 0.30%??1?0.45%, ?0.05%??2?0.05%, ?0.6%??3??0.3%, 2.85?b/a, 10 ?m?b?15 ?m, and 3 ?m?c?b?5.5 ?m are satisfied, and transmission loss for a wavelength of 1550 nm when the optical fiber is wound around a mandrel with a diameter of 10 mm is no greater than 0.2 dB/turn.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: March 10, 2015
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hiroshi Oyamada, Hitoshi Nakajima
  • Publication number: 20150040616
    Abstract: Provided is an optical fiber glass base material manufacturing method that includes flame polishing an outside of a starting base material that includes a core and a first cladding with an oxyhydrogen flame and then arranging a glass fine particle synthesis burner facing the starting base material, which rotates, moving the starting base material and the burner back and forth relative to each other along the starting base material, and depositing glass fine particles produced by hydrolysis of glass raw material in the oxyhydrogen flame as a porous glass layer of a second cladding, the method comprising synthesizing and depositing the glass fine particles under conditions in which a hydrogen flow rate during a first back and forth deposition pass performed immediately after supply of raw material is started is greater than a normal hydrogen flow rate.
    Type: Application
    Filed: April 2, 2014
    Publication date: February 12, 2015
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Hitoshi NAKAJIMA
  • Patent number: 8945246
    Abstract: An object of the present invention is to provide a method for producing a liquefied fuel oil using biomass as a feedstock, in which a relatively inexpensive liquefaction apparatus is used; a good balance is maintained between the liquefaction of water-insoluble lignin and the liquefaction of water-soluble cellulose to achieve a high yield of the liquefied fuel oil based on the biomass solids content; and the amount of ash derived from an alkali catalyst and the like is low. The method for producing a liquefied fuel oil using biomass as a feedstock is characterized by adding, to biomass comprising lignocellulose, a solvent comprising an organic solvent and having a moisture content adjusted to 10 to 25 wt %, including moisture contained in the biomass, and liquefying the biomass at a temperature of 250 to 350° C.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: February 3, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazushi Tsurutani, Hitoshi Hayashi, Tsutomu Sakai, Mitsuru Kondo, Hitoshi Nakajima
  • Publication number: 20130272669
    Abstract: An optical fiber comprising a first core, a second core, a third core, and a cladding, wherein with a refractive index of the cladding as a reference, ?1 is a maximum value of a relative refractive index difference of the first core, ?2 is a maximum value of a relative refractive index difference of the second core, ?3 is a minimum value of a relative refractive index difference of the third core, “a” is a half-value radial width for the relative refractive index difference (?1??2) of the first core, “b” is a radius of a second core/third core boundary, and “c” is a radius of a third core/cladding boundary, the expressions 0.30%??1?0.45%, ?0.05%??2?0.05%, ?0.6%??3??0.3%, 2.85?b/a, 10 ?m?b?15 ?m, and 3 ?m?c?b?5.5 ?m are satisfied, and transmission loss for a wavelength of 1550 nm when the optical fiber is wound around a mandrel with a diameter of 10 mm is no greater than 0.2 dB/turn.
    Type: Application
    Filed: April 10, 2013
    Publication date: October 17, 2013
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroshi OYAMADA, Hitoshi NAKAJIMA
  • Publication number: 20130244137
    Abstract: The present invention provides a catalyst for a polymer electrolyte fuel cell including catalyst particles made of platinum supported on a carbon powder carrier, wherein the carbon powder carrier includes 0.7 to 3.0 mmol/g (based on the weight of the carrier) of a hydrophilic group bonded thereto; and the platinum particles have an average particle size of 3.5 to 8.0 nm and the platinum specific surface area based on CO adsorption (COMSA) of 40 to 100 m2/g. The catalyst for a polymer electrolyte fuel cell according to the present invention is a catalyst excellent in initial activity and satisfactory in durability.
    Type: Application
    Filed: December 2, 2011
    Publication date: September 19, 2013
    Applicant: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Tomoyuki Tada, Koichi Matsutani, Takeshi Kaieda, Katsuichiro Hayakawa, Hitoshi Nakajima
  • Publication number: 20130027694
    Abstract: The present invention provides an apparatus and method which enable detecting a microscopic defect sensitively by efficiently collecting and detecting scattering light from a defect in a wider region without enlarging the apparatus. In the apparatus for inspecting a defect on a surface of a sample, including illumination means which irradiates a surface of a sample with laser, reflected light detection means which detects reflected light from the sample, and signal processing means which processes a detected signal and detecting a defect on the sample, the reflected light detection means is configured to include a scattering light detection unit which collects scattering light components of the reflected light from the sample by excluding specularly reflected light components by using an aspheric flannel lens and detecting the scattering light components.
    Type: Application
    Filed: October 5, 2012
    Publication date: January 31, 2013
    Inventors: Kenichi SHITARA, Hitoshi NAKAJIMA
  • Publication number: 20130027693
    Abstract: The present invention provides an apparatus and method which enable detecting a microscopic defect sensitively by efficiently collecting and detecting scattering light from a defect in a wider region without enlarging the apparatus. In the apparatus for inspecting a defect on a surface of a sample, including illumination means which irradiates a surface of a sample with laser, reflected light detection means which detects reflected light from the sample, and signal processing means which processes a detected signal and detecting a defect on the sample, the reflected light detection means is configured to include a scattering light detection unit which collects scattering light components of the reflected light from the sample by excluding specularly reflected light components by using an aspheric flannel lens and detecting the scattering light components.
    Type: Application
    Filed: October 5, 2012
    Publication date: January 31, 2013
    Inventors: Kenichi SHITARA, Hitoshi NAKAJIMA
  • Publication number: 20100192457
    Abstract: An object of the present invention is to provide a method for producing a liquefied fuel oil using biomass as a feedstock, in which a relatively inexpensive liquefaction apparatus is used; a good balance is maintained between the liquefaction of water-insoluble lignin and the liquefaction of water-soluble cellulose to achieve a high yield of the liquefied fuel oil based on the biomass solids content; and the amount of ash derived from an alkali catalyst and the like is low. The method for producing a liquefied fuel oil using biomass as a feedstock is characterized by adding, to biomass comprising lignocellulose, a solvent comprising an organic solvent and having a moisture content adjusted to 10 to 25 wt %, including moisture contained in the biomass, and liquefying the biomass at a temperature of 250 to 350° C.
    Type: Application
    Filed: July 18, 2008
    Publication date: August 5, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazushi Tsurutani, Hitoshi Hayashi, Tsutomu Sakai, Mitsuru Kondo, Hitoshi Nakajima
  • Publication number: 20060141334
    Abstract: The present invention provides a catalyst for a fuel cell with excellent resistance for poisoning gas such as CO and the electrode using the same, and a high performance catalyst for a direct methanol-type fuel cell using methanol as fuel and the electrode using the same. For this purpose, the present invention uses a solid heteropolyacid catalyst for a fuel cell which is a partial salt of a heteropolyacid including a noble metal and/or a transition metal and having a molecular weight of 800 to 10000.
    Type: Application
    Filed: November 12, 2003
    Publication date: June 29, 2006
    Inventors: Hitoshi Nakajima, Itaru Homma
  • Patent number: 6436866
    Abstract: Disclosed is a Lewis acid catalyst composition comprising a specific mixed medium and a Lewis acid catalyst (II), wherein the specific mixed medium is mixed medium (I) comprising a perfluorinated aliphatic hydrocarbon (A) and at least one non-fluorinated hydrocarbon or a mixed medium (I′) comprising a perfluorinated aliphatic hydrocarbon (A), a perfluorinated aromatic hydrocarbon (C) and water (D), and wherein the Lewis acid catalyst (II) is at least one compound selected from the group consisting of compounds respectively represented by the following formulae (1), (2) and (3): (RfSO3)nM  (1), [(RfSO2)2N]nM  (2), and [(RfSO2)3C]nM  (3). Also disclosed is a Lewis acid catalyst represented by the above-mentioned formula (3).
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: August 20, 2002
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Joji Nishikido, Hitoshi Nakajima
  • Patent number: 6284696
    Abstract: A mesopore molecular sieve having a hydrocarbon group bonded directly to a silicon atom in the metal oxide skeleton constituting the molecular sieve, wherein the content of said hydrocarbon group is from 0.01 to 0.6 mol per mol of the metal oxide. Also disclosed is a process for producing a mesopore molecular sieve having a hydrocarbon atom bonded to a silicon atom in the molecular sieve skeleton, which comprises synthesizing the mesopore molecular sieve, in the presence of a template, from: a silane compound represented by the following formula (1): RnSiX(4−n)  (1) wherein R represents a hydrocarbon group selected from C1-16 hydrocarbon groups and hydrocarbon groups substituted with an N—, O-, S-, P- or halogen-containing group; n represents 1, 2 or 3; and X is selected from C1-6 alkoxy groups, aryloxy groups, a hydroxyl group and halogen atoms and a plurality of X may be the same or different; and a metal oxide and/or a precursor thereof.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: September 4, 2001
    Assignees: Asahi Kasei Kogyo Kabushiki Kaisha, The Noguchi Institute
    Inventors: Masahiko Koya, Hitoshi Nakajima, Itsuho Aishima
  • Patent number: 6190430
    Abstract: An efficient method for producing a hydrogen-containing gas for a fuel cell by using a gas produced by reforming reaction of an organic compound is disclosed. The method comprises the following steps: adding an oxygen-containing gas to a hydrogen-containing gas containing carbon monoxide to form a mixed gas, and bringing the mixed gas into contact with a catalyst comprising a ruthenium metal as a main component and having a carbon monoxide adsorption of not less than 1 mmol/g-ruthenium and a carbon monoxide adsorption index of not less than 0.5, to thereby oxidize and remove carbon monoxide.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: February 20, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yohei Fukuoka, Keizo Tomokuni, Hitoshi Nakajima