Patents Assigned to DENKA COMPANY LIMITED
  • ELECTRON SOURCE AND METHOD FOR MANUFACTURING SAME, AND EMITTER AND DEVICE PROVIDED WITH SAME
    Publication number: 20230317395
    Abstract: A method for manufacturing an electron source according to the present disclosure includes steps of: (A) preparing a first member provided with a columnar portion made of a first material having an electron emission characteristic, (B) preparing a second member which has a higher work function and a lower strength than the first material, and in which a hole is formed extending in a direction from one end surface toward the other end surface, and (C) pushing the columnar portion into the hole in the second member, wherein the first member has a cross-sectional shape that is dissimilar to the cross-sectional shape of the hole; and in the step (C), by pressing the columnar portion into the hole, a portion of a side surface of the columnar portion scrapes the inner surface of the hole and bites into the second member, thereby fixing the columnar portion to the second member.
    Type: Application
    Filed: April 14, 2021
    Publication date: October 5, 2023
    Applicant: Denka Company Limited
    Inventors: Daisuke ISHIKAWA, Hiromitsu CHATANI
  • AMORPHOUS SILICA POWDER AND RESIN COMPOSITION
    Publication number: 20230312356
    Abstract: An amorphous silica powder that is suitable for obtaining a solid sealant that exhibits superior fluidity and filling properties, and a resin composition obtained by using the amorphous silica powder as a filler. An amorphous silica powder is prepared so as to have a modal diameter within the range of 1 to 10 ?m in the particle diameter frequency distribution and have a frequency of particles having particle diameters of 0.50 to 1.83 ?m of less than 3.0% in the particle diameter frequency distribution.
    Type: Application
    Filed: August 17, 2021
    Publication date: October 5, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventors: Yasuaki HATAYAMA, Takashi FUKUDA, Atsuya SUGIMOTO
  • LIGHT-EMITTING DEVICE
    Publication number: 20230313973
    Abstract: A light-emitting device has a light-emitting substrate having a circuit pattern layer over one surface of an insulating substrate and a plurality of light-emitting elements bonded to the circuit pattern layer, the light-emitting substrate has a phosphor layer on one surface side of the insulating substrate and includes a phosphor wherein the light emission peak wavelength is in a visible light region when the light emission of at least one of the light-emitting elements is used as excitation light, the elements have a plurality of serial bodies wherein the light-emitting elements are connected in series and arranged in parallel from an inner to an outer side of the substrate surface when the substrate surface of the light-emitting substrate is viewed from a top surface, and anode sides of the serial bodies are arranged on the same side of either the inner or the outer side of the substrate surface.
    Type: Application
    Filed: August 5, 2021
    Publication date: October 5, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventor: Masahiro KONISHI
  • PHOSPHOR COATING MATERIAL, COATING FILM, PHOSPHOR BOARD, AND ILLUMINATION DEVICE
    Publication number: 20230312943
    Abstract: A phosphor coating material containing phosphor particles and a curable resin component. A viscosity of the phosphor coating material, measured at 25° C. and a rotation speed of 20 rpm using a B-type viscometer, is equal to or more than 60 dPa·s and equal to or less than 450 dPa·s.
    Type: Application
    Filed: July 30, 2021
    Publication date: October 5, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventor: Masahiro KONISHI
  • VINYL ALCOHOL-BASED POLYMER
    Publication number: 20230313021
    Abstract: A vinyl alcohol-based polymer useful as an additive for oil well cement is provided. The vinyl alcohol-based polymer is produced by saponification of a homopolymer of a vinyl ester monomer or a copolymer of a vinyl ester monomer and a polyfunctional monomer, wherein the vinyl alcohol-based polymer has a difference between transmittance (A) of 1 mass % aqueous solution at 660 nm and transmittance (B) of 1 mass % aqueous solution at 430 nm, i.e. (A-B), of 5 to 25. It is preferable that 1 mass % aqueous solution of the vinyl alcohol-based polymer have a transmittance of 95% or less in an entire wavelength region of 200 nm to 800 nm, and the vinyl alcohol-based polymer have a yellow index of 10 or less.
    Type: Application
    Filed: July 15, 2021
    Publication date: October 5, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventor: Akihiro YAMASHITA
  • Resin composition, heat-shrinkable film, and container
    Patent number: 11773251
    Abstract: The heat-shrinkable film includes a block copolymer comprising a vinyl aromatic hydrocarbon-derived structural unit and a conjugated diene-derived structural unit as a main component.
    Type: Grant
    Filed: January 9, 2023
    Date of Patent: October 3, 2023
    Assignee: DENKA COMPANY LIMITED
    Inventors: Yuya Nakamura, Jun Yoshida
  • MOLDED ARTICLE AND METHOD FOR PRODUCING SAME
    Publication number: 20230303461
    Abstract: A molded article having a small difference in thermal conductivities between a central section and a section located at an outer peripheral surface side; and a method for producing the same; wherein, a plate-shaped molded article includes an aluminum-silicon carbide composited section in which a metal including aluminum was impregnated into a silicon carbide porous body, wherein a difference in the densities, by Archimedes’ principle, of a central section of the aluminum-silicon carbide composited section and of at least a portion of an outer side section located further toward the outside peripheral surface side than the central section is 3% or less.
    Type: Application
    Filed: February 16, 2022
    Publication date: September 28, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventors: Daisuke GOTO, Hiroaki OTA
  • BORON NITRIDE PARTICLES, METHOD FOR PRODUCING BORON NITRIDE PARTICLES, RESIN COMPOSITION, AND METHOD FOR PRODUCING RESIN COMPOSITION
    Publication number: 20230295399
    Abstract: A method for producing a boron nitride particle, including a step of disposing a mixture and a base material in a container formed of a carbon material, in which the mixture includes boron carbide and boric acid, and the base material is formed of a carbon material and a step of generating a boron nitride particle on the base material by heating and pressurization with a nitrogen atmosphere formed in the container. A boron nitride particle having a maximum length of 80 ?m or longer, and an aspect ratio of 1.5 or more.
    Type: Application
    Filed: August 19, 2021
    Publication date: September 21, 2023
    Applicant: Denka Company Limited
    Inventors: Yusuke SASAKI, Kenji MIYATA, Michiharu NAKASHIMA
  • PARTICLE HAVING SPECIFIC LOWER ORDER TITANIUM OXIDE CRYSTAL COMPOSITION, AND METHOD FOR PRODUCING SAME
    Publication number: 20230295442
    Abstract: A method for producing a particle, containing a step of heating a mixture containing TiH2 and TiO2 at 700 to 900° C., wherein a molar ratio of the TiH2 to the TiO2 contained in the mixture is 3.1 to 4.6. A particle having a crystal composition composed of Ti2O3 and ?-Ti3O5, wherein a molar ratio of the Ti2O3 to the ?-Ti3O5 is 0.1 or more.
    Type: Application
    Filed: August 13, 2021
    Publication date: September 21, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventors: Takuji KOBAYASHI, Motoharu FUKAZAWA, Takuto OKABE
  • EMITTER AND DEVICE PROVIDED WITH SAME
    Publication number: 20230298846
    Abstract: An emitter according to the present disclosure includes: first and second heaters generating heat by energization; an electron source comprising a first material emitting an electron by being heated by the first and second heaters; and an intermediate member interposed between the electron source, and the first and second heaters, the intermediate member comprising a second material lower in thermal conductivity than the first material.
    Type: Application
    Filed: August 5, 2021
    Publication date: September 21, 2023
    Applicant: Denka Company Limited
    Inventors: Daisuke ISHIKAWA, Hiromitsu CHATANI
  • BORON NITRIDE PARTICLES, RESIN COMPOSITION, AND METHOD FOR PRODUCING RESIN COMPOSITION
    Publication number: 20230294991
    Abstract: A boron nitride particle having a bent shape. A resin composition containing the boron nitride particle and a resin. A method for producing a resin composition including a step of preparing the boron nitride particle and a step of mixing the boron nitride particle with a resin.
    Type: Application
    Filed: August 19, 2021
    Publication date: September 21, 2023
    Applicant: Denka Company Limited
    Inventors: Yusuke SASAKI, Kenji MIYATA, Michiharu NAKASHIMA
  • MALEIMIDE COPOLYMER
    Publication number: 20230294346
    Abstract: A maleimide-based copolymer having superior dispersibility during melt extrusion and kneading. A maleimide-based copolymer having an average particle diameter of 75 ?m or larger and a cumulative oversize at 1000 ?m of lower than 5 mass %.
    Type: Application
    Filed: September 22, 2021
    Publication date: September 21, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventors: Kohei NISHINO, Masamichi ENDO
  • Method for producing acrylic rubber, acrylic rubber, acrylic rubber composition, vulcanized substance thereof, and application for vulcanized substance
    Patent number: 11760821
    Abstract: A method for producing an acrylic rubber, the method including dividedly adding 80% to 100% by mass of the total mass of a monomer component containing 100 parts by mass of an acrylic acid alkyl ester having an alkyl group having 1 to 3 carbon atoms, 20 to 160 parts by mass of an acrylic acid alkyl ester having an alkyl group having 4 to 8 carbon atoms, and 0.1 to 10 parts by mass of a crosslinking seat monomer containing a carboxyl group, and performing emulsion polymerization at a polymerization temperature of 20° C. to 60° C. The monomer component may further contain a methacrylic acid alkyl ester having an alkyl group having 1 to 4 carbon atoms, and ethylene.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: September 19, 2023
    Assignee: Denka Company Limited
    Inventors: Tatsuya Nakano, Toshiaki Miyauchi, Takashi Kawasaki
  • Block copolymer composition, heat shrink film using same, and package provided with heat shrink film
    Patent number: 11760825
    Abstract: A block copolymer composition containing at least one type of block copolymer component obtained by using a vinyl aromatic hydrocarbon and a conjugated diene, wherein the block copolymer composition satisfies the conditions (1) to (3) indicated below. (1) The weight-average molecular weight is at least 100000 and at most 300000, and the conjugated diene content is at least 18 mass % and at most 35 mass %. (2) The vinyl aromatic hydrocarbon block percentage is at least 80% and at most 100% relative to the total amount of the vinyl aromatic hydrocarbon. (3) At least 30 mass % and at most 60 mass % of block copolymer components having a conjugated diene content of at least 30 mass % are included.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: September 19, 2023
    Assignee: DENKA COMPANY LIMITED
    Inventors: Tadashi Sawasato, Yuya Nakamura, Jun Yoshida
  • METHOD FOR CULTIVATING CITRUS PLANT AND LIQUID COMPOSITION
    Publication number: 20230284626
    Abstract: Disclosed is a method for cultivating a citrus plant comprising: applying to the citrus plants a liquid composition comprising Fe ions and humus acids, wherein at least a portion of the Fe ions are Fe2+ ions.
    Type: Application
    Filed: March 14, 2022
    Publication date: September 14, 2023
    Applicant: Denka Company Limited
    Inventors: Kazuma HONDA, Minoru MORIOKA, Gavin DIAZ
  • COMPOSITION AND CURED PRODUCT THEREOF
    Publication number: 20230287222
    Abstract: A varnish having low viscosity and a cured product thereof having a high degree of cross-linking, exhibiting excellent low dielectric properties and mechanical properties at high temperature, and a low coefficient of linear thermal expansion are provided. A varnish comprising an olefin-aromatic vinyl compound-aromatic polyene copolymerized oligomer satisfying specific conditions, one or more selected from the following (a) to (c), and (d) a solvent: (a) a curing agent; (b) one or a plurality of resins selected from a hydrocarbon-based elastomer, a polyphenylene ether-based resin, an olefin-aromatic vinyl compound-aromatic polyene copolymer, and an aromatic polyene-based resin; and (c) a polar monomer; and a cured product of the varnish.
    Type: Application
    Filed: July 13, 2021
    Publication date: September 14, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventor: Toru ARAI
  • ADENOVIRUS IMMUNIZATION MEASUREMENT METHOD AND IMMUNIZATION MEASUREMENT DEVICE
    Publication number: 20230288418
    Abstract: An object of the present invention is to provide: a monoclonal antibody that makes it possible that adenovirus contained in a test specimen is detected and measured rapidly, simply, and with high-sensitivity; and an immunoassay for adenovirus and an immunoassay device therefor, for both of which the monoclonal antibody is used. The present invention provides: a monoclonal antibody or an antigen-binding fragment thereof, which undergoes antigen-antibody reaction with a hexon trimer of adenovirus; and an immunoassay and an immunoassay device that are used with the monoclonal antibody.
    Type: Application
    Filed: April 15, 2021
    Publication date: September 14, 2023
    Applicant: Denka Company Limited
    Inventors: Takashi MIYAZAWA, Miwa KUWAHARA
  • METHOD FOR CULTIVATING CITRUS PLANT
    Publication number: 20230284625
    Abstract: Disclosed is a method for cultivating a citrus plant, comprising: applying to the citrus plant a liquid composition comprising Fe ions, wherein at least a portion of the Fe ions are Fe2+ ions, wherein the citrus plant is cultivated in sandy soil.
    Type: Application
    Filed: March 14, 2022
    Publication date: September 14, 2023
    Applicant: Denka Company Limited
    Inventors: Kazuma HONDA, Minoru MORIOKA, Gavin DIAZ
  • A SIMPLE METHOD FOR COLLECTING A SAMPLE OF A MUCOSAL FLUID ADHERED TO THE MUCOSAL SURFACE OF THE NASAL CAVITY AND A TEST KIT FOR DETECTING AN ANALYTE IN THE SAMPLE
    Publication number: 20230288419
    Abstract: This invention provides a method for analyzing an analyte in a sample in a rapid and simple manner with high accuracy with the use of a sample of a mucosal fluid adhered to the mucosal surface of the nasal cavity collected using a nasal spray device in a less invasive and simple manner. The method comprises detecting an infectious disease by applying a washing liquid to the nasal cavity of a subject suspected of an infectious disease to wash the mucosal surface of the nasal cavity and using, as a sample, the collected wash liquid containing the mucosal fluid adhered to the mucosal surface of the nasal cavity.
    Type: Application
    Filed: July 13, 2021
    Publication date: September 14, 2023
    Applicant: Denka Company Limited
    Inventors: Takashi MIYAZAWA, Chihfang TIEN
  • FIBERS FOR ARTIFICIAL HAIR AND HAIR ACCESSORY
    Publication number: 20230284723
    Abstract: A fiber for artificial hair, having a base fiber and a metal salt of a polymer compound that is present in at least a part of a surface of the base fiber, in which the metal salt contains at least one metal selected from the group consisting of silver, zinc, and copper. A headdress article having the fiber for artificial hair.
    Type: Application
    Filed: July 7, 2021
    Publication date: September 14, 2023
    Applicant: Denka Company Limited
    Inventors: Koji ASANUMA, Takashi MURAOKA, Yuki SAGARA