Patents Assigned to Nichias Corporation
  • Positive electrode active material for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery
    Publication number: 20040229123
    Abstract: Disclosed is a positive electrode active material for a nonaqueous electrolyte secondary battery having at least a lithium-transition metal composite oxide of a layer structure, in which an existence ratio of at least one selected from the group consisting of elements which may become tetravalent and magnesium is 20% or more on a surface of the lithium-transition metal composite oxide. By use of this positive electrode active material, a nonaqueous electrolyte secondary battery having excellent battery characteristics, specifically, having excellent high rate characteristics, cycle characteristics, low-temperature characteristics, thermal stability, and the like, under the even more harsh environment for use can be realized.
    Type: Application
    Filed: March 23, 2004
    Publication date: November 18, 2004
    Applicant: NICHIA CORPORATION
    Inventors: Takeshi Takahashi, Takeshi Oba, Kenji Fujino, Junichi Tokuno, Masuhiro Morizaki, Takeyuki Kondo, Jun Seyama
  • Positive electrode active material for nonaqueous electrolyte secondary battery, positive electrode mixture for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery
    Publication number: 20040229124
    Abstract: Disclosed is a positive electrode active material for a nonaqueous electrolyte secondary battery containing at least a lithium-transition metal composite oxide of a spinel structure, in which at least one kind of element which may become tetravalent exists on at least a surface of the lithium-transition metal composite oxide, and concentration of the element which may become tetravalent on the surface of the lithium-transition metal composite oxide is higher than concentration of the element which may become tetravalent inside the lithium-transition metal composite oxide. A use of this positive electrode active material can improve cycle characteristics and high rate characteristics without reducing the charge-discharge capacity of the lithium-transition metal composite oxide.
    Type: Application
    Filed: May 17, 2004
    Publication date: November 18, 2004
    Applicant: NICHIA CORPORATION
    Inventors: Yoshifumi Miyamoto, Kenichi Kobayashi
  • Shape memory foam member and method of producing the same
    Patent number: 6817441
    Abstract: A shape memory foam member is disclosed. A coefficient of water absorption of the shape memory foam member is in the range between 0.01 g/cm3 and 0.2 g/cm3 in a non-compressed state. The shape memory foam member is compressed with heating; cooled with keeping the shape memory foam member in the compressed state; and released from the compressive pressure on the shape memory foam member after cooling. The original shape of the shape memory foam member is substantially recovered by heating.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: November 16, 2004
    Assignee: Nichias Corporation
    Inventors: Atsushi Murakami, Kazuo Nishimoto, Takahiro Niwa
  • Anti-squeal shim and structure for attaching the same
    Publication number: 20040222055
    Abstract: The present invention provides an anti-squeal shim for use in a disc brake comprising a pressing member for pressing a brake pad toward a disc rotor and a back plate of the brake pad in a disc brake, wherein the anti-squeal shim comprises a plated steel plate and a rubber layer, wherein the rubber layer is fixed on at least one side thereof.
    Type: Application
    Filed: March 5, 2004
    Publication date: November 11, 2004
    Applicant: Nichias Corporation
    Inventors: Takahiro Niwa, Masaki Yoshihara, Junichi Kondoh, Tadashi Arai
  • Fluororubber molded article and method for producing the same
    Publication number: 20040220293
    Abstract: The present invention provides a fluororubber molded article obtained by a process comprising subjecting a fluororubber composition to crosslinking by irradiation of ionizing radiation, wherein the fluororubber composition comprises: (i) a raw rubber which comprises a tetrafluoroethylene-propylene copolymer and which has a metal element content of 1.5% by weight or less; and (ii) silica which has a primary particle size of 0.5 &mgr;m or less and which has been treated to have a hydrophobic surface. Also disclosed is a method for producing the fluororubber molded article.
    Type: Application
    Filed: March 23, 2004
    Publication date: November 4, 2004
    Applicant: Nichias Corporation
    Inventors: Naoya Kuzawa, Katsumi Watanabe, Mitsuyuki Nakano
  • Disc roll, method for producing the same, and disc member base material
    Publication number: 20040220032
    Abstract: The present invention relates to a disc roll comprising: a plurality of annular disc members each defining a hole and having a peripheral surface; and a rotary shaft fitted into the holes of the annular disc members by insertion, thereby the peripheral surfaces of the disc members serve as a conveying surface of the disc roll, wherein said disc members have a compression deformation rate of 0.05 to 0.3 mm under a load of 10 kgf/cm, or wherein the disc members comprise an inorganic fiber, mica and a clay having a content of particle components that have a particle size of 5 &mgr;m or larger of not higher than 30% by weight based on the weight of the clay. Also disclosed are methods for producing the disc roll and disc member base materials for obtaining the disc members.
    Type: Application
    Filed: March 30, 2004
    Publication date: November 4, 2004
    Applicant: Nichias Corporation
    Inventors: Masaaki Nakayama, Daiji Tahara, Masafumi Igo
  • LED lamp with prismatic cover lens
    Patent number: 6808293
    Abstract: The LED lamp includes a plurality of light emitting diodes and a cover lens arranged so that light emitted by the plurality of light emitting diodes is output through the cover lens. The cover lens has a plurality of prisms including a plurality of first prisms formed on the inner surface thereof, and a direction and shape of the incident surfaces of the first prisms are set such that the first prisms output light in first luminous intensity distribution patterns that are substantially equal to each other.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: October 26, 2004
    Assignee: Nichia Corporation
    Inventors: Kazunori Watanabe, Masaru Kato
  • Gasket material
    Publication number: 20040195781
    Abstract: A gasket material to be mounted on an engine of a vehicle, including: a metal plate; a film made from silica and a reaction product of an acid component and metal or a metallic compound; and a rubber layer formed on at least one of opposite surfaces of the metal plate through the film.
    Type: Application
    Filed: September 11, 2003
    Publication date: October 7, 2004
    Applicant: Nichias Corporation
    Inventors: Hiroshi Saito, Kenichiro Ishikawa
  • Light emitting device, display apparatus with an array of light emitting devices, and display apparatus method of manufacture
    Patent number: 6800996
    Abstract: A light emitting device and display apparatus using a plurality of light emitting devices can drastically reduce contrast loss due to light from an external source. The light emitting device has (a) light emitting chip(s) and a first layer covering the light emitting chip(s). A second layer including a light scattering material is provided at least over the first layer, and the surface of second layer has a plurality of protrusions which follow the topology of the light scattering material. The display apparatus is formed by disposing these light emitting devices in an array on a substrate.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: October 5, 2004
    Assignee: Nichia Corporation
    Inventors: Yoshifumi Nagai, Yuichi Fujiwara, Kunihiro Izuno
  • Process for producing separator for fuel cell
    Publication number: 20040188879
    Abstract: The present invention provides a separator for a fuel cell in which an electrically anisotropic conductive filler can be made uniformly oriented without using a special mold or special molding apparatus, and which has excellent conductivity.
    Type: Application
    Filed: March 26, 2004
    Publication date: September 30, 2004
    Applicant: NICHIAS CORPORATION
    Inventors: Hideyuki Shishitani, Tsuyoshi Inagaki, Atsushi Omura
  • Combination metal gasket and seal structure
    Publication number: 20040183262
    Abstract: The present invention provides a combination metal gasket that is formed by fitting a ring-shaped metal base elastic structure in at least one trough portion of two trough portions of a ring-shaped metal gasket that has an S-shaped longitudinal cross section. The combination metal gasket does not demonstrate the plastic deformation even when a large compressive load is applied and is not likely to be destroyed even when a pressure of a fluid being sealed is high; that is, stable sealing properties are exhibited.
    Type: Application
    Filed: January 5, 2004
    Publication date: September 23, 2004
    Applicant: NICHIAS Corporation
    Inventors: Kenichi Takahiro, Hideaki Mori, Kanji Hanashima
  • Conductive resin composition, fuel cell separator and method for producing fuel cell separator
    Publication number: 20040185320
    Abstract: The present invention provides a conductive resin composition having good fluidity, excellent conductivity, and particularly suitable for the production of a fuel cell separator, and provides a fuel cell separator having excellent conductivity, high dimensional accuracy and excellent gas sealability at low cost, using the above-mentioned conductive resin material.
    Type: Application
    Filed: March 17, 2004
    Publication date: September 23, 2004
    Applicant: NICHIAS CORPORATION
    Inventors: Tsuyoshi Inagaki, Atsushi Omura, Hideyuki Shishitani
  • NITRIDE SEMICONDUCTOR WITH ACTIVE LAYER OF WELL STRUCTURE WITH INDIUM-CONTAINING NITRIDE SEMICONDUCTOR
    Publication number: 20040183063
    Abstract: A nitride semiconductor device has a nitride semiconductor layer structure. The structure includes an active layer of a quantum well structure containing an indium-containing nitride semiconductor. A first nitride semiconductor layer having a band gap energy larger than that of the active layer is provided in contact with the active layer. A second nitride semiconductor layer having a band gap energy smaller than that of the first layer is provided over the first layer. Further, a third nitride semiconductor layer having a band gap energy larger than that of the second layer is provided over the second layer.
    Type: Application
    Filed: March 16, 2004
    Publication date: September 23, 2004
    Applicant: Nichia Corporation
    Inventors: Shuji Nakamura, Shinichi Nagahama, Naruhito Iwasa
  • Thermally expandable material and method for producing the same
    Publication number: 20040181003
    Abstract: The present invention provides a thermally expandable material expandable from a compressed state by heat, which comprises a form material comprising a crosslinked rubber having impregnated with a crystalline thermoplastic resin and which is compressed. Also disclosed are a joint material and a soundproof cover for an automobile engine, each comprising the thermally expandable material.
    Type: Application
    Filed: March 9, 2004
    Publication date: September 16, 2004
    Applicant: NICHIAS CORPORATION
    Inventors: Atsushi Murakami, Kinro Hashimoto
  • Light-emitting gallium nitride-based compound semiconductor device
    Patent number: 6791103
    Abstract: A light-emitting gallium nitride-based compound semiconductor device of a double-heterostructure. The double-heterostructure includes a light-emitting layer formed of a low-resistivity InxGa1−xN (0<x<1) compound semiconductor doped with p-type and/or n-type impurity. A first clad layer is joined to one surface of the light-emitting layer and formed of an n-type gallium nitride-based compound semiconductor having a composition different from the light-emitting layer. A second clad layer is joined to another surface of the light-emitting layer and formed of a low-resistivity, p-type gallium nitride-based compound semiconductor having a composition different from the light-emitting layer.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: September 14, 2004
    Assignee: Nichia Corporation
    Inventors: Shuji Nakamura, Takashi Mukai, Naruhito Iwasa
  • Metal gasket
    Patent number: 6786490
    Abstract: A metal gasket for a high performance of an engine includes two sheets of elastic metal substrates providing a bead on peripheral portion of a cylinder opening and an annular thin metal plate that is thinner than the elastic metal substrates and surrounds the cylinder opening and is arranged between the substrates. The annular thin metal plate is fixed on the substrate by inserting an engaging portion solidly projected from the outside periphery into a slit formed on the substrate and folding the plate. Due to the thin metal plate, the cylinder opening peripheral portion has a high seal contact pressure in contrast to other locations. Moreover, the contact pressure of the cylinder opening peripheral portion becomes uniform.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: September 7, 2004
    Assignee: Nichias Corporation
    Inventors: Michio Fujino, Yutaka Miyata, Hironobu Imanaka, Takeshi Murata
  • Plasma-resistant fluorine-based elastomer sealing material
    Patent number: 6787610
    Abstract: An elastomer sealing material having low dielectric constant and low dielectric dissipation, which is satisfactory with both of resistance to oxygen plasma and non-adhesion to quartz and can be applied to apparatus utilizing microwaves, is disclosed. The plasma-resistant fluorine-based elastomer sealing material comprises a fluorine-based elastomer having a divalent perfluoropolyether or divalent perfluoroalkylene structure in the main chain thereof and having two or more hydrosilyl groups and addition-reactive alkenyl groups in the terminals or side chains thereof, and a polymer having two or more hydrosilyl groups in the molecule and being capable of addition reacting with the alkenyl groups, the fluorine-based elastomer being crosslinked with the polymer.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: September 7, 2004
    Assignee: Nichias Corporation
    Inventors: Kazuki Morimoto, Mitsuyuki Nakano, Kazuo Nishimoto
  • Light emitting diode
    Patent number: D496007
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: September 14, 2004
    Assignee: Nichia Corporation
    Inventor: Toshiyuki Hoshiba
  • Light emitting diode
    Patent number: D497349
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: October 19, 2004
    Assignee: Nichia Corporation
    Inventor: Toshiyuki Hoshiba
  • Light emitting diode
    Patent number: D497884
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: November 2, 2004
    Assignee: Nichia Corporation
    Inventor: Ryoma Suenaga