Patents Assigned to Showa Denko K.K.
  • Publication number: 20210371769
    Abstract: A method for producing a lubricating oil composition includes: a step of mixing a base oil and fullerene, dissolving a soluble component of the fullerene in the base oil, and obtaining a mixture of the base oil and fullerene; a step of removing an insoluble component included in the mixture and obtaining a fullerene solution; and a step of heat-treating the fullerene solution.
    Type: Application
    Filed: October 24, 2018
    Publication date: December 2, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Ryuji MONDEN, Yu GAO, Kunio KONDO, Masumi KURITANI
  • Publication number: 20210373093
    Abstract: A magnetic sensor 1 includes: a nonmagnetic substrate 10; a sensitive element 31 laminated on the substrate 10, the sensitive element 31 being made of a soft magnetic material, the sensitive element 31 having a longitudinal direction and a transverse direction and having uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction, the sensitive element 31 being configured to sense a magnetic field by a magnetic impedance effect; and a pair of thin-film magnets 20a, 20b laminated on the substrate 10 and disposed to face each other in the longitudinal direction across the sensitive element 31, the pair of thin-film magnets 20a, 20b being configured to apply a magnetic field in the longitudinal direction of the sensitive element 31.
    Type: Application
    Filed: September 5, 2019
    Publication date: December 2, 2021
    Applicant: SHOWA DENKO K. K.
    Inventors: Daizo ENDO, Tatsunori SHINO, Haruhisa OHASHI
  • Publication number: 20210371763
    Abstract: A fullerene-containing lubricating oil composition including a base oil and fullerene, wherein the fullerene is dissolved, and the concentration is 1 ppm by mass or more and less than 50 ppm by mass.
    Type: Application
    Filed: October 23, 2018
    Publication date: December 2, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Ryuji MONDEN, Yu GAO
  • Patent number: 11189313
    Abstract: A magnetic recording medium includes a substrate, an underlayer provided above the substrate, and a magnetic layer provided on and in contact with the underlayer. The underlayer includes a compound represented by a general formula MgO(1-x), where x falls within a range of 0.07 to 0.25. The magnetic layer includes an alloy having a L10 structure, and the alloy having the L10 structure includes one or more elements selected from a group consisting of Al, Si, Ga, and Ge.
    Type: Grant
    Filed: January 5, 2021
    Date of Patent: November 30, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Koichi Nagasaka, Takayuki Fukushima, Lei Zhang, Chen Xu, Hisato Shibata, Takehiro Yamaguchi, Hiroshi Koyanagi, Yuji Umemoto
  • Patent number: 11187762
    Abstract: A magnetic sensor 1 is provided with: a thin film magnet 20 configured with a hard magnetic material and having magnetic anisotropy in an in-plane direction; a sensitive part 30 including a sensitive element 31 configured with a soft magnetic material and disposed to face the thin film magnet 30, the sensitive element 31 having a longitudinal direction in which a magnetic flux generated by the thin film magnet 20 passes through and a short direction, having uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, and sensing a change in a magnetic field; and a control layer 102 disposed on a side of the thin film magnet 20 opposite to a side of the thin film magnet 20 on which the sensitive element 31 is provided, the control layer 102 controlling the magnetic anisotropy of the thin film magnet 20 to be directed in the in-plane direction.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: November 30, 2021
    Assignee: SHOWA DENKO K.K.
    Inventor: Daizo Endo
  • Publication number: 20210363078
    Abstract: Provided is a method for producing tetrafluoromethane, and the method is unlikely to damage a reaction apparatus and can produce tetrafluoromethane safely, inexpensively, and stably. To a raw material liquid (1) containing a reaction inducer and a fluorinated hydrocarbon represented by chemical formula CpHqClrFs (in the chemical formula, p is an integer of 3 or more and 18 or less, q is an integer of 0 or more and 3 or less, r is an integer of 0 or more and 9 or less, and s is an integer of 5 or more and 30 or less) and having no carbon-carbon unsaturated bond, fluorine gas is introduced to give tetrafluoromethane. The reaction inducer is a hydrocarbon polymer solid at normal temperature and pressure and is reacted with fluorine gas to induce a reaction of forming tetrafluoromethane from the fluorinated hydrocarbon and the fluorine gas.
    Type: Application
    Filed: December 25, 2018
    Publication date: November 25, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Yohsuke FUKUCHI, Tomokazu SUGAWARA, Shinya OGURO, Hiroshi KOBAYASHI
  • Patent number: 11183340
    Abstract: A method of producing a solid electrolytic capacitor, including a step of forming a dielectric film on the surface of a valve-acting metal having fine pores and a step of forming a solid electrolyte layer containing a conductive polymer on the dielectric film; wherein the solid electrolyte layer containing the conductive polymer is formed without using an oxidizing agent by: (i) a method of polymerizing at least one of the compounds (A1) represented by formula (1) disclosed herein in the presence of a compound (B) having a sulfo group; (ii) a method of copolymerizing at least one compound (A2) represented by formula (2) disclosed herein; and (iii) a method of polymerizing at least one of the compounds (A1) and (A2).
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: November 23, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Takeshi Kawamoto, Yuka Niimi, Toshiya Kawasaki, Yoshinori Shibuya, Takeshi Kohama
  • Patent number: 11180457
    Abstract: Provided is a fluorine-containing ether compound capable of forming a lubricant layer having excellent wear resistance even when the thickness is thin, and suitable as a material of a lubricant for a magnetic recording medium. The fluorine-containing ether compound is a compound represented by the following formula (1): R1—R2—CH2—R3—CH2—R4—R5; wherein R3 is a perfluoropolyether chain; R1 is a terminal group bonded to R2; R5 is a terminal group bonded to R4; R1 is an alkenyl group or an alkynyl group; R5 is a group containing a heterocyclic ring; R2 is represented by the following formula (2); R4 is represented by the following formula (3); and a in the formula (2) and b in the formula (3) are each independently an integer of 1 to 3.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: November 23, 2021
    Assignee: SHOWA DENKO K. K.
    Inventors: Tsuyoshi Kato, Daisuke Yagyu, Naoya Fukumoto, Yuta Yamaguchi, Masumi Kuritani, Katsumi Murofushi, Masaki Nanko, Hiroyuki Tomita
  • Patent number: 11168043
    Abstract: Provided are a method and an apparatus for producing 1,2,3,4-tetrachlorobutane that are unlikely to lose 3,4-dichloro-1-butene as the material or 1,2,3,4-tetrachlorobutane as the product and can be stably and economically produce 1,2,3,4-tetrachlorobutane. A reaction liquid (1) containing 3,4-dichloro-1-butene is placed in a reaction container (11), then chlorine gas is supplied to a gas phase (2) in the reaction container (11), and the 3,4-dichloro-1-butene is reacted with the chlorine gas to give 1,2,3,4-tetrachlorobutane.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: November 9, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Katsumi Mikami, Yohsuke Fukuchi, Shinya Oguro, Hiroshi Kobayashi
  • Patent number: 11167264
    Abstract: Provided is a packing material for liquid chromatography, including a gel obtained by polymerizing monomers including 40% by mass or more of a crosslinkable monomer having a (meth)acryloyloxy group.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: November 9, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Toru Matsui, Junya Kato
  • Publication number: 20210341103
    Abstract: A method supply equipment for supplying a fluorine gas-containing gas which includes a sealing step of introducing a second fluorine gas-containing gas having a fluorine gas concentration in a range of ±10% of that of a first fluorine gas-containing gas into a portion between a container valve (3) and a pressure regulator (7) of a pipe (4) such that a pressure is lower than the gas pressure in a filled container (2). After the sealing step, a buffer tank (9) is brought into an opened state, and then the first fluorine gas-containing gas is supplied from the filled container (2) to the portion between the container valve (3) and the pressure regulator (7) of the pipe (4). Thereafter, the pressure regulator (7) is brought into an opened state, and then the first fluorine gas-containing gas is supplied to consumption equipment (20) while regulating a pressure by the pressure regulator (7).
    Type: Application
    Filed: July 30, 2019
    Publication date: November 4, 2021
    Applicant: SHOWA DENKO K.K
    Inventor: Yuya NISHIO
  • Publication number: 20210340457
    Abstract: A fluorine-containing ether compound represented by formula (1) shown below. R4—CH2—R3—CH2—R2—CH2—R1—CH2—R2—CH2—R3—CH2—R4??(1) (In formula (1), R1 and R3 represent different perfluoropolyether chains, R2 represents a linking group containing one or more polar groups, and R4 represents a terminal group containing two or more polar groups.
    Type: Application
    Filed: November 24, 2017
    Publication date: November 4, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Naoya FUKUMOTO, Yuta YAMAGUCHI, Naoko ITO, Katsumi MUROFUSHI
  • Patent number: 11164751
    Abstract: An etching method capable of controlling the etching rate of a silicon nitride layer and the etching rate of a silicon oxide layer to be approximately equal to each other. A body to be treated including a laminated film (5) having silicon oxide layers (2) and silicon nitride layers (3) laminated on top of each other is treated with an etching gas containing a halocarbon compound containing carbon, bromine, and fluorine. Then, the silicon oxide layer (2) and the silicon nitride layer (3) are etched at approximately equal etching rates.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: November 2, 2021
    Assignee: SHOWA DENKO K.K.
    Inventor: Tomoyuki Fukuyo
  • Patent number: 11160744
    Abstract: A gel composition containing (a) at least one selected from tocopherol phosphoric acid esters and salts thereof; (b) carrageenan; (c) locust bean gum; (d) at least one selected from agar and glucomannan; and e) water.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: November 2, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Natsuno Mishina, Naoko Ito, Manami Hatano, Risa Iguchi
  • Publication number: 20210332487
    Abstract: An anode mounting member (16) of a fluorine electrolytic cell including: a plurality of stacked annular packings surrounding a sidewall of a cylindrical anode packing gland (14); a cylindrical exterior member (23) surrounding an outer periphery of the packings; and an annular fastening member (24) that fastens the plurality of packings and the exterior member (23) to the anode packing gland (14), wherein among the packings a first ceramic packing (17) is located at an end of the longitudinal direction on an electrolyte tank side, and a second resin packing (18) is adjacent to the first packing (17), central axes of the anode packing gland (14) and the exterior member (23) coincide, an inner diameter (17r) is 0.2 mm to 1.0 mm larger than an outer diameter (14R), and an outer diameter (17R) is 0.2 mm to 1.0 mm smaller than an inner diameter (23r).
    Type: Application
    Filed: June 26, 2018
    Publication date: October 28, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Yohsuke FUKUCHI, Nozomi INOUE, Hiroshi KOBAYASHI
  • Patent number: 11154902
    Abstract: To provide: a transparent conductive substrate containing silver nanowires and having excellent optical characteristics, electrical characteristics and light resistance; and a method for producing the same. A transparent conductive substrate characterized by comprising: a substrate; a transparent conductive film formed on at least one principal surface of the substrate, and containing a binder resin and conductive fibers; and a protective film formed on the transparent conductive film, wherein the thermal decomposition starting temperature of the binder resin is 210° C. or higher, and the protective film is a thermal-cured film obtained using a thermosetting resin.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: October 26, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Masahiko Toba, Eri Nakazawa, Shigeru Yamaki
  • Publication number: 20210317551
    Abstract: Provided is an aluminum alloy member for forming a fluoride film thereon, the fluoride film being excellent in smoothness without occurrence of a black dot-shaped bulged portion and excellent in corrosion resistance against corrosive gas and plasma, etc. The aluminum alloy member for forming a fluoride film thereon 1 for use in a semiconductor producing apparatus consists of Si: 0.3 mass % to 0.8 mass %; Mg: 0.5 mass % to 5.0 mass %; Fe: 0.05 mass % to 0.5 mass %; Cu: 0 mass % or more and 0.5 mass % or less; Mn: 0 mass % or more and 0.30 mass % or less; Cr: 0 mass % or more and 0.30 mass % or less 0.5 mass % or less; and the balance being Al and inevitable impurities. When an average major diameter of a Fe-based crystallized product in the aluminum alloy member is D (?m), and an average crystalline particle diameter in the aluminum alloy member is Y (?m), a relation expression of log10 Y?0.320D+4.60 is satisfied.
    Type: Application
    Filed: April 19, 2019
    Publication date: October 14, 2021
    Applicant: SHOWA DENKO K.K.
    Inventor: Isao MURASE
  • Publication number: 20210317390
    Abstract: Provided is a composition having high affinity for the surface of an adhesive, and excellent long-term storage stability. This composition comprises: a quaternary alkylammonium fluoride or a hydrate of a quaternary alkylammonium fluoride; and an aprotic solvent, wherein the aprotic solvent includes (A) an N-substituted amide compound having 4 or more carbon atoms and not containing active hydrogen on a nitrogen atom, and (B) an ether compound.
    Type: Application
    Filed: September 26, 2019
    Publication date: October 14, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Susumu NAKAZAKI, Kuniaki MIYAHARA, Tomoyuki FUKUYO
  • Publication number: 20210309520
    Abstract: A nitrous oxide purification method includes a step of performing gas separation by introducing a mixed gas containing nitrous oxide into a gas separation membrane including a polymer material to cause nitrous oxide to selectively permeate the gas separation membrane.
    Type: Application
    Filed: September 12, 2019
    Publication date: October 7, 2021
    Applicant: SHOWA DENKO K.K.
    Inventor: Hideyuki KURIHARA
  • Publication number: 20210310138
    Abstract: An anode for electrolytic synthesis (3) for electrolytically synthesizing fluorine gas. The anode includes an anode substrate (31) formed of a metallic material and a carbonaceous layer (33) formed of a carbonaceous material and arranged on the surface of the anode substrate (31). The metallic material is an iron-based alloy containing iron and nickel. Also disclosed is a method for producing fluorine gas using the anode for electrolytic synthesis.
    Type: Application
    Filed: July 29, 2019
    Publication date: October 7, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Yohsuke FUKUCHI, Shinya OGURO, Hiroshi KOBAYASHI