Patents by Inventor Hitoshi Yokouchi

Hitoshi Yokouchi 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: 7431911
    Abstract: The present invention provides a barium titanate having a small particle size, containing small amounts of unwanted impurities, and exhibiting excellent electric characteristics, which can be employed for forming a dielectric ceramic thin film required for a small-sized capacitor which enables production of a small-sized electronic apparatus; and a process for producing the barium titanate. When a titanium oxide sol is reacted with a barium compound in an alkaline solution containing a basic compound, the basic compound is removed in the form of gas after completion of reaction, and the resultant reaction mixture is fired, a barium titanate having a large BET specific surface area and a high tetragonality content is produced.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: October 7, 2008
    Assignee: Showa Denko K.K.
    Inventors: Akihiko Shirakawa, Hitoshi Yokouchi
  • Publication number: 20080223434
    Abstract: The present invention provides a solar cell that is useful for industry and has high photoelectric conversion efficiency and a method of manufacturing the same. A solar cell according to an aspect of the invention includes: a substrate; a buffer layer that is formed on the substrate and is composed of a group-III nitride semiconductor; and a group-III nitride semiconductor layer (p-type layer/an n-type layer) that has a p-n junction therein and is formed on the buffer layer. At least one of the buffer layer and the group-III nitride semiconductor layer having the p-n junction therein has a compound semiconductor layer formed by a sputtering method.
    Type: Application
    Filed: February 19, 2008
    Publication date: September 18, 2008
    Applicant: SHOWA DENKO K.K.
    Inventors: Yoshiaki Ikenoue, Hisayuki Miki, Kenzo Hanawa, Yasumasa Sasaki, Hitoshi Yokouchi, Ryoko Konta, Hiroaki Kaji
  • Publication number: 20080145292
    Abstract: The present invention provides a barium titanate having a small particle size, containing small amounts of unwanted impurities, and exhibiting excellent electric characteristics; and a process for producing the barium titanate. The perovskite-type barium titanate comprising at least one element selected from the group consisting of Sn, Zr, Ca, Sr, Pb, and the like, in an amount of 5 mol % or less (inclusive of 0 mol %) based on BaTiO3, wherein the molar ratio of A atom to B atom in the perovskite structure represented by ABX3 (A atom is surrounded with 12× atoms, and B atom is surrounded with 6× atoms) is from 1.001 to 1.025, and the specific surface area x (m2/g) and the ratio y of the c-axis length to the a-axis length of the crystal lattice as calculated by the Rietveld method satisfy the following formula. y>1.0083?6.53×10?7×x3 (wherein y=c-axis length/a-axis length, and 6.6?x?20).
    Type: Application
    Filed: August 30, 2005
    Publication date: June 19, 2008
    Applicant: Showa Denko K.K.
    Inventors: Akihiko Shirakawa, Hitoshi Yokouchi
  • Publication number: 20060172880
    Abstract: A barium titanate, which is single crystal in the form of particles, said particles comprising particles without a void having a diameter of 1 nm or more in an amount of 20% or more by number of the total particles. A dielectric material comprising the barium titanate as well as a capacitor comprising the dielectric material.
    Type: Application
    Filed: December 18, 2003
    Publication date: August 3, 2006
    Inventors: Akihiko Shirakawa, Hitoshi Yokouchi
  • Publication number: 20060133988
    Abstract: A titanium-containing perovskite composite oxide particle represented by the compositional formula: A(TixB(1?x))yO3 (provided that x and y each denoting a compositional ratio are 0?x?1 and 0.98?y?1.02, A is at least one or more element selected from Ca, Sr, Ba, Pb and Mg, and B is at least one or more element selected from Hf and Zr), wherein the specific surface area is from 1 to 100 m2/g, the average primary particle diameter D1 defined by formula (I) is from 10 to 1,000 nm, and the ratio D2/D1 of D1 to the average secondary particle diameter D2 is from 1 to 10: D1=6/?S??(I) (wherein ? is a density of the particle and S is a specific surface area).
    Type: Application
    Filed: December 21, 2005
    Publication date: June 22, 2006
    Inventors: Tadatoshi Kurozumi, Hitoshi Yokouchi
  • Patent number: 7041269
    Abstract: The present invention provides a barium titanate having a small particle size, containing small amounts of unwanted impurities, and exhibiting excellent electric characteristics, which can be employed for forming a dielectric ceramic thin film required for a small-sized capacitor which enables production of a small-sized electronic apparatus; and a process for producing the barium titanate. When a titanium oxide sol is reacted with a barium compound in an alkaline solution containing a basic compound, the basic compound is removed in the form of gas after completion of reaction, and the resultant reaction mixture is fired, a barium titanate having a large BET specific surface area and a high tetragonality content is produced.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: May 9, 2006
    Assignee: Showa Denko K.K.
    Inventors: Akihiko Shirakawa, Hitoshi Yokouchi
  • Publication number: 20060078492
    Abstract: The present invention provides a perovskite titanium-containing composite oxide fine particle represented by the formula: (A1XA2(1?X))YTiO3±? (wherein 0?X?1, 0.98?Y?1.02, 0???0.05, A1 and A2 each is an atom selected from a group consisting of Ca, Sr, Ba, Pb and Mg and are different from each other), wherein the specific surface area is from 1 to 100 m2/g and the D2/D1 value is from 1 to 10.
    Type: Application
    Filed: October 11, 2005
    Publication date: April 13, 2006
    Inventors: Tadatoshi Kurozumi, Akihiko Shirakawa, Hitoshi Yokouchi
  • Publication number: 20030044347
    Abstract: The present invention provides a barium titanate having a small particle size, containing small amounts of unwanted impurities, and exhibiting excellent electric characteristics, which can be employed for forming a dielectric ceramic thin film required for a small-sized capacitor which enables production of a small-sized electronic apparatus; and a process for producing the barium titanate. When a titanium oxide sol is reacted with a barium compound in an alkaline solution containing a basic compound, the basic compound is removed in the form of gas after completion of reaction, and the resultant reaction mixture is fired, a barium titanate having a large BET specific surface area and a high tetragonality content is produced.
    Type: Application
    Filed: July 3, 2002
    Publication date: March 6, 2003
    Applicant: SHOWA DENKO K.K.
    Inventors: Akihiko Shirakawa, Hitoshi Yokouchi
  • Patent number: 6432222
    Abstract: A method for producing a grain-oriented electrical steel sheet excellent in magnetic property, comprising the steps of; heating a slab containing a prescribed amount of Al to a temperature of 1,200° C. or higher, hot-rolling the slab into a hot-rolled strip, annealing the strip as required, cold-rolling it once or twice or more with intermediate annealing(s), and decarburization annealing the cold rolled sheet, and final box annealing after the application of an annealing separator to prevent strip sticking during the annealing, characterized by heating the slab to a temperature (slab heating temperature Ts (° C.)) higher than the complete solution temperature of substances having intensities as inhibitors and nitriding treating the decarburization annealed steel sheet before the commencement of secondary recrystallization during the final box annealing.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: August 13, 2002
    Assignee: Nippon Steel Corporation
    Inventors: Yoshifumi Ohata, Tomoji Kumano, Norikazu Fujii, Hisashi Mogi, Hitoshi Yokouchi, Norihiro Yamamoto
  • Publication number: 20020007870
    Abstract: A method for producing a grain-oriented electrical steel sheet excellent in magnetic property, comprising the steps of; heating a slab containing a prescribed amount of Al to a temperature of 1,200° C. or higher, hot-rolling the slab into a hot-rolled strip, annealing the strip as required, cold-rolling it once or twice or more with intermediate annealing(s), and decarburization annealing the cold rolled sheet, and final box annealing after the application of an annealing separator to prevent strip sticking during the annealing, characterized by heating the slab to a temperature (slab heating temperature Ts(° C.)) higher than the complete solution temperature of substances having intensities as inhibitors and nitriding treating the decarburization annealed steel sheet before the commencement of secondary recrystallization during the final box annealing.
    Type: Application
    Filed: June 4, 2001
    Publication date: January 24, 2002
    Inventors: Yoshifumi Ohata, Tomoji Kumano, Norikazu Fujii, Hisashi Mogi, Hitoshi Yokouchi, Norihiro Yamamoto
  • Patent number: 5913563
    Abstract: A powered sliding device for a sliding door comprises a wire drum rotated by a motor, a wire cable connecting the wire drum and the sliding door, a clutch mechanism provided between the wire drum and the motor. The clutch mechanism has a first coupling state for opening the door, a second coupling state for closing the door, and an uncoupling state. The wire drum has a cylindrical shape having a substantially closed end and an opposite open end, and an inner space formed inside thereof. The clutch mechanism is substantially provided within the inner space. The clutch mechanism is displaced into the first coupling state when the motor rotates in a given direction and displaced into the second coupling state when the motor rotates in a direction opposite to the given direction.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: June 22, 1999
    Assignee: Mitsui Kinzoku Kogyo Kabushiki Kaisha
    Inventors: Hirofumi Watanabe, Tetsuro Mizuki, Mitsuhiro Watanabe, Yuji Yoda, Hitoshi Yokouchi, Manabu Nakajima, Daisaku Matsuo
  • Patent number: 5832669
    Abstract: A powered sliding unit attached to a vehicle body slides a sliding door from an open position to a half-latch position where a rear latch unit fixed to the sliding door is initially engaged with a rear striker fixed to the vehicle body, and then a powered closing unit provided to the sliding door moves the sliding door from the half-latch position into a full-latch position where the rear latch unit is completely engaged with the rear striker. The powered sliding unit has a vertical base plate, a wire drum rotatably attached to the base plate by a horizontal shaft, and a wire cable for coupling the wire drum with the sliding door. The powered sliding unit is attached in an inner space inside of a rear outer side panel of the vehicle body.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: November 10, 1998
    Assignee: Mitsui Kinzoku Kogyo Kabushiki Kaisha
    Inventors: Tetsuro Mizuki, Hirofumi Watanabe, Yuji Yoda, Hitoshi Yokouchi