Patents by Inventor Junko Matsushita

Junko Matsushita 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: 10770719
    Abstract: A negative electrode active material includes a carbon material including boron and a silicon material including at least one selected from silicon and silicon oxide. The silicon material does not include boron. A peak of a B1s spectrum of the carbon material occurs at a binding energy of 187.0 eV or more and 192.0 eV or less, the B1s spectrum being measured by X-ray photoelectron spectroscopy. The ratio of the area of the peak of the B1s spectrum of the carbon material which occurs at a binding energy of 187.0 eV or more and 192.0 eV or less, the B1s spectrum being measured by X-ray photoelectron spectroscopy, to the total area of peaks of the B1s spectrum which occur at a binding energy of 184.0 eV or more and 196.5 eV or less is 50% or more.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: September 8, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akira Kano, Junko Matsushita, Nobuhiko Hojo
  • Publication number: 20200183261
    Abstract: A projection-type image display apparatus is provided with a light source, a disk, a color separator, and first and second modulation elements. The disk generates color lights in a time-division manner based on emission light from the light source unit, and the color separator separates first, second, and third primary colors from the color lights generated by the disk. The first light modulation element modulates the separated first and second primary colors according to an input first image signal to generate a first image light, and the second light modulation element that modulates the separated third primary color according to an input second image signal to generate a second image light. A control circuit controls the first and second light modulation elements such that the second light modulation element becomes an ON-state during a spoke period of the disk upon displaying the third primary color as a single color.
    Type: Application
    Filed: December 9, 2019
    Publication date: June 11, 2020
    Inventor: Junko MATSUSHITA
  • Publication number: 20200079945
    Abstract: Provided are a curable composition and a tire sealant composition which are capable of maintaining a balance among processability, shape retention, and elongation at a high level. The curable composition comprises the following components A to C: A: a reactive silicon group-containing polymer; B: one or more polymers having a number average molecular weight of 50,000 or less, the polymers being selected from the group consisting of polybutene, polyisobutylene, polyisobutylene butadiene, polypentene, and polyisopentene; and C: one or more resins selected from the group consisting of C5 resin, C9 resin, C5-C9 resin, dicyclopentadiene resin, rosin resin, alkylphenol resin, and terpene phenol resin.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 12, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Junko MATSUSHITA
  • Publication number: 20200083529
    Abstract: A positive-electrode active material contains a lithium composite oxide containing manganese. The crystal structure of the lithium composite oxide belongs to a space group Fd-3m. The integrated intensity ratio I(111)/I(400) of a first peak I(111) on the (111) plane to a second peak I(400) on the (400) plane in an XRD pattern of the lithium composite oxide satisfies 0.05?I(111)/I(400)?0.90.
    Type: Application
    Filed: November 14, 2019
    Publication date: March 12, 2020
    Inventors: RYUICHI NATSUI, KENSUKE NAKURA, JUNKO MATSUSHITA, ISSEI IKEUCHI
  • Patent number: 10559846
    Abstract: A negative-electrode active material comprises a graphite including at least boron and fluorine. The fluorine is disposed at least on a surface of the graphite. A ratio R satisfies 0.5?R?1, where R=SBB/SB, and SB denotes a total peak area of a boron 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SBB denotes a peak area of all spectra each having a peak in a binding energy range of not less than 184.0 eV and not more than 188.5 eV in the boron 1s spectrum.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: February 11, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Nakatsutsumi, Akira Kano, Junko Matsushita, Nobuhiko Hojo
  • Publication number: 20200044249
    Abstract: A positive-electrode active material contains a lithium composite oxide containing at least one selected from the group consisting of F, Cl, N, and S. The crystal structure of the lithium composite oxide belongs to a space group C2/m. An XRD pattern of the lithium composite oxide comprises a first peak within the first range of 44 degrees to 46 degrees of a diffraction angle 2? and a second peak within the second range of 18 degrees to 20 degrees of the diffraction angle 2?. The ratio of the second integrated intensity of the second peak to the first integrated intensity of the first peak is within a range of 0.05 to 0.90.
    Type: Application
    Filed: October 9, 2019
    Publication date: February 6, 2020
    Inventors: RYUICHI NATSUI, KENSUKE NAKURA, JUNKO MATSUSHITA, ISSEI IKEUCHI
  • Publication number: 20200020943
    Abstract: A positive-electrode active material contains a lithium composite oxide, wherein the lithium composite oxide is a multiphase mixture including a first phase, of which a crystal structure belongs to a space group Fm-3m, and a second phase, of which a crystal structure belongs to a space group Fd-3m; and in an XRD pattern of the lithium composite oxide, the integrated intensity ratio I(18°-20°)/I(43°-46°) of a first maximum peak I(18°-20°) within a first range of 18 degrees to 20 degrees at a diffraction angle 2? to a second maximum peak I(43°-46°) within a second range of 43 degrees to 46 degrees at the diffraction angle 2? satisfies 0.05?I(18°-20°)/I(43°-46°)?0.90.
    Type: Application
    Filed: September 3, 2019
    Publication date: January 16, 2020
    Inventors: RYUICHI NATSUI, KENSUKE NAKURA, JUNKO MATSUSHITA, ISSEI IKEUCHI
  • Patent number: 10497967
    Abstract: A negative-electrode active material comprises a graphite including boron and nitrogen. A ratio R1 satisfies 0.5?R1?1, where R1=SBN/SB, and SB denotes a total peak area of a boron 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SBN denotes a peak area of a spectrum assigned to boron bonded to nitrogen in the boron 1s spectrum. A ratio R2 satisfies 0<R2?0.05, where R2=SB/(SB+SC+SN), and SC denotes a peak area of a carbon 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SN denotes a peak area of a nitrogen 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: December 3, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tetsuyuki Okano, Takayuki Nakatsutsumi, Mayumi Maenishi, Masahiro Takahata, Junko Matsushita, Akira Kano, Nobuhiko Hojo
  • Patent number: 10424785
    Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery includes a plurality of composite particles. Each of the plurality of composite particles includes an inorganic particle, one or more covering layers, each of which is in contact with a surface of the inorganic particle, and a carbonaceous material layer that covers the inorganic particle and has voids. The carbonaceous material layer includes a first region having a porosity of 4.3% or more and 10.0% or less, the first region being a region extending from the surface of the inorganic particle to the surface of an imaginary sphere that is centered at the center of the inorganic particle and has a radius of 3r, where r is a radius of the inorganic particle. Each of the voids is separated by one of the one or more covering layers from the surface of the inorganic particle.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: September 24, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Daisuke Katou, Kenichi Hotehama, Junko Matsushita
  • Publication number: 20190198861
    Abstract: A positive-electrode active material contains a compound represented by the following composition formula (1): LixMeyAzO?F???(1) where Me denotes one or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, Cu, Nb, Mo, Ti, Cr, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ru, and W, A denotes one or more elements selected from the group consisting of B, Si, and P, and the following conditions: 1.3?x?2.1, 0.8?y?1.3, 0<z?0.2, 1.8???2.9, and 0.1???1.2 are satisfied. A crystal structure of the compound belongs to a space group Fm-3m.
    Type: Application
    Filed: March 5, 2019
    Publication date: June 27, 2019
    Inventors: RYUICHI NATSUI, JUNKO MATSUSHITA, KENSUKE NAKURA
  • Publication number: 20180337423
    Abstract: A negative-electrode active material comprises a graphite including boron and nitrogen. A ratio R1 satisfies 0.5?R1?1, where R1=SBN/SB, and SB denotes a total peak area of a boron 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SBN denotes a peak area of a spectrum assigned to boron bonded to nitrogen in the boron 1s spectrum. A ratio R2 satisfies 0<R2?0.05, where R2=SB/(SB+SC+SN), and SC denotes a peak area of a carbon 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SN denotes a peak area of a nitrogen 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy.
    Type: Application
    Filed: April 23, 2018
    Publication date: November 22, 2018
    Inventors: TETSUYUKI OKANO, TAKAYUKI NAKATSUTSUMI, MAYUMI MAENISHI, MASAHIRO TAKAHATA, JUNKO MATSUSHITA, AKIRA KANO, NOBUHIKO HOJO
  • Publication number: 20180337424
    Abstract: A negative-electrode active material comprises: a graphite including boron; and a covering layer that covers a surface of the graphite. The covering layer comprises carbon. A ratio R satisfies 0?R?0.001, where R=SB/(SB+SC), and SB denotes a total peak area of a boron 1 s spectrum of the negative-electrode active material obtained by X-ray photoelectron spectroscopy, and SC denotes a total peak area of a carbon 1 s spectrum of the negative-electrode active material obtained by X-ray photoelectron spectroscopy.
    Type: Application
    Filed: April 23, 2018
    Publication date: November 22, 2018
    Inventors: TAKAYUKI NAKATSUTSUMI, NOBUHIKO HOJO, AKIRA KANO, JUNKO MATSUSHITA
  • Publication number: 20180337425
    Abstract: A negative-electrode active material comprises a graphite including at least boron and fluorine. The fluorine is disposed at least on a surface of the graphite. A ratio R satisfies 0.5?R?1, where R=SBB/SB, and SB denotes a total peak area of a boron 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SBB denotes a peak area of all spectra each having a peak in a binding energy range of not less than 184.0 eV and not more than 188.5 eV in the boron 1s spectrum.
    Type: Application
    Filed: April 23, 2018
    Publication date: November 22, 2018
    Inventors: TAKAYUKI NAKATSUTSUMI, AKIRA KANO, JUNKO MATSUSHITA, NOBUHIKO HOJO
  • Patent number: 10087312
    Abstract: Provided is a rubber composition including a rubber component. The rubber component contains at least a polymer that is a synthesized polyisoprene or an isoprene copolymer and that has 20% or less gel fraction.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: October 2, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Junko Matsushita, Shojiro Kaita, Satoru Tamaki
  • Publication number: 20180094124
    Abstract: Provided is a rubber composition including a rubber component. The rubber component contains at least a polymer that is a synthesized polyisoprene or an isoprene copolymer and that has 20% or less gel fraction.
    Type: Application
    Filed: December 6, 2017
    Publication date: April 5, 2018
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Junko MATSUSHITA, Shojiro Kaita, Satoru Tamaki
  • Patent number: 9862815
    Abstract: The present invention provides a rubber composition that comprises a rubber component containing a polybutadiene and a dienic rubber or an olefinic rubber immiscible with the polybutadiene, and a filler, in which the Mooney viscosity (ML1+4/100° C.) of the polybutadiene referred to as ML(I), and the Mooney viscosity (ML1+4/100° C.) of the dienic rubber or the olefinic rubber immiscible with the polybutadiene referred to as ML(II) are in a relation of ML(I)?ML(II), a method for producing the rubber composition and a tire using the rubber composition. The rubber composition is excellent in fracture resistance and capable of attaining good workability not lowering the durability such as abrasion resistance and the like of tires, and can reduce the rolling resistance of tires.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: January 9, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Junko Matsushita
  • Publication number: 20170373307
    Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery includes a plurality of composite particles. Each of the plurality of composite particles includes an inorganic particle, one or more covering layers, each of which is in contact with a surface of the inorganic particle, and a carbonaceous material layer that covers the inorganic particle and has voids. The carbonaceous material layer includes a first region having a porosity of 4.3% or more and 10.0% or less, the first region being a region extending from the surface of the inorganic particle to the surface of an imaginary sphere that is centered at the center of the inorganic particle and has a radius of 3r, where r is a radius of the inorganic particle. Each of the voids is separated by one of the one or more covering layers from the surface of the inorganic particle.
    Type: Application
    Filed: June 15, 2017
    Publication date: December 28, 2017
    Inventors: DAISUKE KATOU, KENICHI HOTEHAMA, JUNKO MATSUSHITA
  • Publication number: 20170346080
    Abstract: A negative electrode active material includes a carbon material including boron and a silicon material including at least one selected from silicon and silicon oxide. The silicon material does not include boron. A peak of a B1s spectrum of the carbon material occurs at a binding energy of 187.0 eV or more and 192.0 eV or less, the B1s spectrum being measured by X-ray photoelectron spectroscopy. The ratio of the area of the peak of the B1s spectrum of the carbon material which occurs at a binding energy of 187.0 eV or more and 192.0 eV or less, the B1s spectrum being measured by X-ray photoelectron spectroscopy, to the total area of peaks of the B1s spectrum which occur at a binding energy of 184.0 eV or more and 196.5 eV or less is 50% or more.
    Type: Application
    Filed: May 16, 2017
    Publication date: November 30, 2017
    Inventors: Akira KANO, Junko MATSUSHITA, Nobuhiko HOJO
  • Patent number: 9777101
    Abstract: A copolymer having properties (durability (fracture resistance, abrasion resistance, and crack-growth resistance)) similar to those of natural rubber and a method of producing the copolymer are provided. An isoprene copolymer has a styrene block or a butadiene block at a terminal thereof, wherein styrene monomers account for less than 5 mol % of all monomers forming the isoprene copolymer having the styrene block; butadiene monomers account for 10 mol % or less of all monomers forming the isoprene copolymer having the butadiene block; and cis-1,4 bond content of a portion derived from isoprene accounts for at least 95% in total.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: October 3, 2017
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Satoru Tamaki, Junko Matsushita, Shojiro Kaita
  • Patent number: 9714338
    Abstract: An object of the present invention is to provide a polymer composition having properties resembling those of natural rubber, e.g. good durability (fracture resistance, wear resistance, and crack growth resistance), and a method for manufacturing the polymer composition. Specifically, the present invention provides a method for manufacturing a polymer composition including a mixture of polyisoprene and polystyrene/polybutadiene, comprising: polymerizing styrene monomer or butadiene monomer in the presence of a catalyst to synthesize polystyrene or polybutadiene; adding isoprene monomer to the polystyrene or polybutadiene thus synthesized, to synthesize polyisoprene and thus generate said mixture, wherein content of the styrene monomer or the butadiene monomer is set to be 10 mol % or less with respect to the total quantity of the styrene monomer/the butadiene monomer and the isoprene monomer.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: July 25, 2017
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Satoru Tamaki, Shojiro Kaita, Junko Matsushita