Patents Assigned to Toda Kogyo Corporation
  • Patent number: 10193141
    Abstract: An object of the present invention is to provide a positive electrode mixture capable of conducting stable charging and discharging with a less amount of gasses generated which has an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium. The present invention relates to a positive electrode mixture comprising carbon black having a bulk density of not more than 0.1 g/cm3, a crystallite size of 10 to 40 ?, an iodine adsorption of 1 to 150 mg/g, a volatile content of not more than 0.1% and a metal impurity content of not more than 20 ppm, and a positive electrode active substance having an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: January 29, 2019
    Assignees: TODA KOGYO CORPORATION, DENKA COMPANY LIMITED
    Inventors: Akihisa Kajiyama, Teruaki Santoki, Daisuke Morita, Ryuta Masaki, Takahiko Sugihara, Tsuyoshi Wakiyama, Kazutoshi Matsumoto, Akira Yoda, Taro Inada, Hiroshi Yokota, Takashi Kawasaki
  • Patent number: 10161057
    Abstract: The present invention provides a precursor of positive electrode active substance particles for non-aqueous electrolyte secondary batteries which have a high discharge voltage and a high discharge capacity, hardly suffer from side reactions with an electrolyte solution, and are excellent in cycle characteristics, positive electrode active substance particles for non-aqueous electrolyte secondary batteries, and processes for producing these particles, and a non-aqueous electrolyte secondary battery.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: December 25, 2018
    Assignee: TODA KOGYO CORPORATION
    Inventors: Hiroyasu Watanabe, Daisuke Morita, Manabu Yamamoto, Kazumichi Koga, Akihisa Kajiyama, Hiroaki Masukuni, Hideaki Sadamura, Ryuta Masaki, Kazutoshi Matsumoto
  • Patent number: 10154585
    Abstract: An object of the present invention is to provide a conductive coating film formed on a polyimide-based insulating substrate by using a metal powder paste which can exhibit a good conductivity and good adhesion to the insulating substrate. By forming a resin cured layer having a solvent-soluble content of not more than 20% by weight and a thickness of not more than 5 ?m on a polyimide-based insulating substrate; forming a metal powder-containing coating layer on the resin cured layer by using a metal powder paste; and then subjecting the resulting coating layer to heat treatment with superheated steam, it is possible to obtain a conductive coating film which can exhibit a good conductivity and good adhesion to the insulating substrate.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: December 11, 2018
    Assignees: TODA KOGYO CORPORATION, TOYOBO CO., LTD.
    Inventors: Takeshi Yatsuka, Chiho Ito, Yasuo Kakihara, Hirotoshi Kizumoto, Koji Shoki
  • Patent number: 10056612
    Abstract: This invention provides lithium manganate which has a high output and is excellent in high-temperature stability. This invention relates to lithium manganate particles which are produced by mixing a lithium compound, a manganese compound, a Y compound and an A compound and then calcining the resulting mixture, and have a composition represented by the following chemical formula 1 and an average secondary particle diameter (D50) of 1 to 15 ?m, in which Y is at least one element selected from the group consisting of Al and Mg; A is a sintering aid element having a melting point of not higher than 850° C.; x and y satisfy 0.03?x?0.15 and 0?y?0.20, respectively; z is in the range of 0 to 2.5 mol % based on Mn, wherein the lithium manganate particles have a sulfur content of not more than 100 ppm.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: August 21, 2018
    Assignee: TODA KOGYO CORPORATION
    Inventors: Kazumichi Koga, Masayuki Uegami, Hiroaki Masukuni, Kazutoshi Matsumoto, Kazutoshi Ishizaki, Hideaki Sadamura
  • Patent number: 10027017
    Abstract: The present invention relates to an RF tag comprising a magnetic antenna for transmitting and receiving information using an electromagnetic induction method, and an IC mounted to the magnetic antenna, wherein the magnetic antenna comprises a magnetic core and a plurality of coils formed on the magnetic core; the coils each have an inductance L1 satisfying the specific relational formula, and are connected in parallel to each other in an electric circuit and disposed in series on the magnetic core; and a combined inductance L0 of the magnetic antenna satisfies the specific relational formula. The RF tag of the present invention is used as a magnetic antenna for information communication using a magnetic field component which is capable of satisfying both reduction in size and improvement in communication sensitivity.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: July 17, 2018
    Assignee: TODA KOGYO CORPORATION
    Inventors: Jun Koujima, Satoshi Ohmae, Tetsuya Kimura, Yoshiro Sato
  • Patent number: 9921510
    Abstract: The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical magnetic composite particles comprising a phenol resin as a binder and ferromagnetic iron oxide particles bonded to each other through the phenol resin, wherein the spherical magnetic composite particles have a ten-point mean roughness Rz of 0.3 to 2.0 ?m. The magnetic carrier for an electrophotographic developer according to the present invention exhibits an excellent durability against peeling-off and abrasion of coating resins formed thereon and a high stability to mechanical stress exerted onto the carrier, is free from occurrence of spent toner, can be stably held over a long period of time without occurrence of fogging and unevenness in density of toner images, and can keep high-quality images with an excellent gradation for a long period of time.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: March 20, 2018
    Assignee: TODA KOGYO CORPORATION
    Inventors: Katsuji Iwami, Shigenori Harada, Eiichi Kurita, Kaori Kinoshita
  • Patent number: 9847526
    Abstract: According to the present invention, there are provided lithium titanate particles which exhibit an excellent initial discharge capacity and an enhanced high-efficiency discharge capacity retention rate as an active substance for non-aqueous electrolyte secondary batteries and a process for producing the lithium titanate particles, and Mg-containing lithium titanate particles.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: December 19, 2017
    Assignee: TODA KOGYO CORPORATION
    Inventors: Akinori Yamamoto, Tomoko Okita, Hiroshi Yamamoto, Kohji Mori, Kazumichi Koga, Akihisa Kajiyama
  • Patent number: 9764962
    Abstract: The present invention provides lithium composite compound particles having good high-temperature storage property and excellent cycle characteristics as an active substance for a non-aqueous electrolyte secondary battery, and a secondary battery using the lithium composite compound particles. The Li—Ni composite oxide particles for a non-aqueous electrolyte secondary battery according to the present invention have a BET specific surface area of 0.05 to 0.8 m2/g; an atomic ratio (Ma/Ni) of a concentration of an amphoteric metal to a concentration of Ni on an outermost surface of the respective Li—Ni composite oxide particles is 2 to 6; and the concentration of the amphoteric metal on the outermost surface of the respective Li—Ni composite oxide particles is higher than a concentration of the amphoteric metal at a position spaced by 50 nm from the outermost surface toward a center of the respective Li—Ni composite oxide particles.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: September 19, 2017
    Assignee: TODA KOGYO CORPORATION
    Inventors: Taiki Imahashi, Hiroyasu Watanabe, Kazuhiko Kikuya, Hideaki Sadamura
  • Patent number: 9634735
    Abstract: The present invention relates to an RF tag comprising a magnetic antenna for transmitting and receiving information using an electromagnetic induction method, and an IC mounted to the magnetic antenna, wherein the magnetic antenna comprises a magnetic core and a plurality of coils formed on the magnetic core; the coils each have an inductance L1 satisfying the specific relational formula, and are connected in parallel to each other in an electric circuit and disposed in series on the magnetic core; and a combined inductance L0 of the magnetic antenna satisfies the specific relational formula. The RF tag of the present invention is used as a magnetic antenna for information communication using a magnetic field component which is capable of satisfying both reduction in size and improvement in communication sensitivity.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: April 25, 2017
    Assignee: TODA KOGYO CORPORATION
    Inventors: Jun Koujima, Satoshi Ohmae, Tetsuya Kimura, Yoshiro Sato
  • Patent number: 9606467
    Abstract: The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical magnetic composite particles comprising a phenol resin as a binder and ferromagnetic iron oxide particles bonded to each other through the phenol resin, wherein the spherical magnetic composite particles have a ten-point mean roughness Rz of 0.3 to 2.0 ?m. The magnetic carrier for an electrophotographic developer according to the present invention exhibits an excellent durability against peeling-off and abrasion of coating resins formed thereon and a high stability to mechanical stress exerted onto the carrier, is free from occurrence of spent toner, can be stably held over a long period of time without occurrence of fogging and unevenness in density of toner images, and can keep high-quality images with an excellent gradation for a long period of time.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: March 28, 2017
    Assignee: TODA KOGYO CORPORATION
    Inventors: Katsuji Iwami, Shigenori Harada, Eiichi Kurita, Kaori Kinoshita
  • Patent number: 9607741
    Abstract: The present invention relates to ferrite particles for bonded magnet, having a volume-average particle diameter of 2.1 to 2.7 ?m and a particle diameter ×90 of 4.3 to 5.4 ?m wherein the ×90 represents a particle diameter at which a cumulative percentage of particles under sieve (undersize particles) based on a volume thereof is 90%, when determined from a particle size distribution thereof measured by using a laser diffraction type particle size distribution measuring apparatus.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: March 28, 2017
    Assignee: TODA KOGYO CORPORATION
    Inventors: Yasuhiko Fujii, Minoru Ohsugi, Yasushi Nishio, Yosuke Koyama, Shigeru Takaragi
  • Patent number: 9586834
    Abstract: The present invention provides positive electrode active substance particles which are improved in charge/discharge capacities, cycle characteristics and thermal stability. The positive electrode active substance particles according to the present invention comprise a compound having at least a crystal system belonging to a space group of R-3m and a crystal system belonging to a space group of C2/m and having a specific peak intensity ratio, in which a content of Mn in the compound is controlled such that a molar ratio of Mn/(Ni+Co+Mn) therein is not less than 0.55; a content of boron in the compound is 0.01 to 1% by weight; a content of fluorine in the compound is 0.01 to 5% by weight; and a content of an element A (at least one element selected from the group consisting of Al, Mg, Ti, Zr, Ca, Fe, Zn, Mo and Bi) in the compound is 0.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: March 7, 2017
    Assignee: TODA KOGYO CORPORATION
    Inventors: Manabu Yamamoto, Daisuke Nishikawa, Kouta Sano, Osamu Sasaki, Hideaki Sadamura
  • Patent number: 9566646
    Abstract: The present invention relates to surface-treated rare earth-based magnetic particles comprising rare-earth-based magnetic particles, a first coating layer comprising a phosphoric acid compound which is formed on a surface of the respective magnetic particles and a second coating layer in the form of a composite coating film comprising a silicon compound and a phosphoric acid compound which is formed on a surface of the first coating layer, wherein an amount of Fe eluted from the rare earth-based magnetic particles is not more than 10 mg/L; a resin composition for bonded magnets comprising the above surface-treated rare earth-based magnetic particles and a resin; and a bonded magnet comprising the above surface-treated rare earth-based magnetic particles.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: February 14, 2017
    Assignee: TODA KOGYO CORPORATION
    Inventors: Kuniyoshi Shigeoka, Nobuhiro Katayama
  • Patent number: 9564634
    Abstract: The present invention relates to positive electrode active substance particles comprising a compound having at least a crystal system belonging to a space group of R-3m and a crystal system belonging to a space group of C2/m, the positive electrode active substance particles having a specific intensity ratio; a content of Mn in the positive electrode active substance particles being controlled such that a molar ratio of Mn/(Ni+Co+Mn) therein is not less than 0.55; and the positive electrode active substance particles comprising an element A (that is at least one element selected from the group consisting of Si, Zr and Y) in an amount of 0.03 to 5% by weight and having a tap density of 0.8 to 2.4 g/cc and a compressed density of 2.0 to 3.1 g/cc. The positive electrode active substance particles can be produced by calcining a mixture of precursor particles comprising the element A, Mn, Ni and/or Co, and a lithium compound.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 7, 2017
    Assignee: TODA KOGYO CORPORATION
    Inventors: Manabu Yamamoto, Daisuke Nishikawa, Taisei Inoue, Osamu Sasaki, Hideaki Sadamura
  • Patent number: 9505631
    Abstract: The present invention relates to positive electrode active substance particles for lithium ion batteries, comprising lithium manganate particles comprising Li and Mn as main components and having a cubic spinel structure (Fd-3m), wherein primary particles of the positive electrode active substance have a dodecahedral or higher-polyhedral shape in which none of crystal planes equivalent to the (111) plane are located adjacent to each other, and flat crystal planes are crossed with each other to form a clear ridge, and an average primary particle diameter of the primary particles is not less than 1 ?m and not more than 20 ?m. The positive electrode active substance particles according to the present invention are excellent in packing property, load characteristics and high-temperature stability.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: November 29, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventors: Hiroaki Masukuni, Kazumichi Koga, Masayuki Uegami, Kazutoshi Matsumoto
  • Patent number: 9502774
    Abstract: The present invention relates to a folded dipole antenna comprising a magnetic material comprising a hexagonal Z-type ferrite and/or a hexagonal Y-type ferrite as a main component in which a radiation element and a reflection element each having a folded dipole structure are disposed, and an RF tag comprising the folded dipole antenna and an IC chip connected to the folded dipole antenna. The RF tag according to the present invention has a smaller size than that of the conventional RF tags and is not susceptible to adverse influence from ambient environments, and can be operated at an UHF band or surrounding frequency bands thereof.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: November 22, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventors: Yoji Okano, Tetsuya Kimura, Kazumi Yamamoto, Takanori Doi, Yoshiro Sato
  • Patent number: 9496551
    Abstract: The present invention relates to lithium manganate particles having a primary particle diameter of not less than 1 ?m and an average particle diameter (D50) of not less than 2 ?m and not more than 10 ?m as measured by a particle size distribution meter, and forming particles having substantially a single phase, which have a composition represented by the following chemical formula: Li1+xMn2?x?yY1yO4+Y2 where Y1 is at least one element selected from the group consisting of Ni, Co, Mg, Fe, Al, Cr and Ti; Y2 is at least one element constituting a sintering aid having a melting point of not higher than 800° C., x and y satisfy 0.03?x?0.15 and 0.05?y?0.20, respectively, and Y2 is present in an amount of 0.1 to 2.5 mol % based on Mn; the Y1 element being dispersed within the respective particles, and an X-ray diffraction intensity ratio of I(400)/I(111) of the particles being not less than 38% and an X-ray diffraction intensity ratio of I(440)/I(111) thereof being not less than 18%.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: November 15, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventors: Kazumichi Koga, Masayuki Uegami, Akihisa Kajiyama, Kazutoshi Ishizaki, Hideaki Sadamura
  • Patent number: 9455444
    Abstract: The present invention relates to lithium composite compound particles having a composition represented by the formula: Li1+xNi1?y?zCoyMzO2 (M=B or Al), wherein the lithium composite compound particles have an ionic strength ratio A (LiO?/NiO2?) of not more than 0.3 and an ionic strength ratio B (Li3CO3+/Ni+) of not more than 20 as measured on a surface of the respective lithium composite compound particles using a time-of-flight secondary ion mass spectrometer. The lithium composite compound particles of the present invention can be used as a positive electrode active substance of a secondary battery which has good cycle characteristics and an excellent high-temperature storage property.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: September 27, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventors: Hiroyasu Watanabe, Taiki Imahashi, Kazuhiko Kikuya, Nobuyuki Tagami, Hideaki Sadamura
  • Patent number: 9448500
    Abstract: The present invention provides magnetic iron oxide particles having a high bonding property to a resin as well as a magnetic carrier for electrophotographic developers which is improved in durability by enhancing adhesion between a magnetic carrier core material and a coating resin. The magnetic iron oxide particles of the present invention are magnetic iron oxide particles having an average particle diameter of 0.5 to 30 ?m onto which a plurality of granules are bonded, and the magnetic carrier for electrophotographic developers according to the present invention is a magnetic carrier for electrophotographic developers which comprises spherical magnetic composite particles produced by dispersing magnetic iron oxide particles in a binder resin in which the magnetic iron oxide particles comprise at least the above magnetic iron oxide particles having an average particle diameter of 0.5 to 30 ?m onto which the plurality of granules are bonded.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: September 20, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventors: Shigenori Harada, Shinji Uemoto, Hiromitsu Misawa, Eiichi Kurita, Koso Aoki
  • Patent number: 9397401
    Abstract: The present invention relates to a magnetic antenna for information communication using a magnetic field component which is capable of satisfying both reduction in size and improvement in communication sensitivity. The magnetic antenna of the present invention is used for transmitting and receiving information using an electromagnetic induction method, and comprises a central core formed of a magnetic material and a non-magnetic material, a coil-shaped electrode material wound around the core, and an insulating layer formed on at least one outside surface of the core on which the coil-shaped electrode material is provided, in which the magnetic material is separated into two or more parts through the non-magnetic material when viewed in a section of the core which is perpendicular to a magnetic flux passing therethrough.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: July 19, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventors: Jun Koujima, Tetsuya Kimura, Takanori Doi, Yoshiro Sato