Patents by Inventor Koji Tatsumi

Koji Tatsumi 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).

  • Publication number: 20190338433
    Abstract: The SnAg alloy plating solution of the invention is a SnAg alloy plating solution including a water-soluble tin compound, a water-soluble silver compound, and a particular sulfide compound in an amount in the range of 0.25 mol or more and 10 mol or less with respect to 1 mol of silver in the water-soluble silver compound.
    Type: Application
    Filed: December 21, 2016
    Publication date: November 7, 2019
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Koji Tatsumi, Tsukasa Yasoshima, Takuma Katase
  • Publication number: 20190229103
    Abstract: A semiconductor device includes: a first switching element that is provided on a high side; a first diode element that is connected in parallel to the first switching element; a second switching element that is provide on a low side and connected in series to the first switching element; and a second diode element that is connected in parallel to the second switching element, wherein the first switching element and one of the first diode element and the second diode element are stacked adjacently to each other in a vertical direction of respective electrode surfaces thereof via a conductive electrode, the second switching element and the other of the first diode element and the second diode element that is different from the diode element adjacent to the first switching element are stacked adjacently to each other in a vertical direction of respective electrode surfaces thereof via a conductive electrode, and the first switching element and the second switching element are not adjacent in a vertical direction
    Type: Application
    Filed: January 25, 2019
    Publication date: July 25, 2019
    Applicants: WASEDA UNIVERSITY, MITSUI HIGH-TEC., INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei TATSUMI, Kazuhito KAMEI, Rikiya Kamimura, Koji SHIMIZU, Kazutoshi UEDA, Nobuaki SATO, Keiji TODA, Masayuki HIKITA, Akihiro IMAKIIRE
  • Patent number: 10105078
    Abstract: A method for causing a computer to execute a process for managing health condition, the process includes: detecting a grounding timing of a leg of a quadruped and a timing of weight-shift to a rear side of the quadruped; and determining whether or not the leg of the quadruped has a disease or injury, based on the detected grounding timing of the leg of the quadruped and the detected timing of a weight-shift to the rear side of the quadruped.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: October 23, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Kiyoko Yamamoto, Koji Tatsumi, Yosuke Senta, Shigeo Takenaka, Atsuko Kawai
  • Publication number: 20160135716
    Abstract: A method for causing a computer to execute a process for managing health condition, the process includes: detecting a grounding timing of a leg of a quadruped and a timing of weight-shift to a rear side of the quadruped; and determining whether or not the leg of the quadruped has a disease or injury, based on the detected grounding timing of the leg of the quadruped and the detected timing of a weight-shift to the rear side of the quadruped.
    Type: Application
    Filed: October 7, 2015
    Publication date: May 19, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Kiyoko YAMAMOTO, Koji Tatsumi, Yosuke Senta, Shigeo TAKENAKA, Atsuko KAWAI
  • Patent number: 8551658
    Abstract: To provide a process for a lithium-containing composite oxide for a positive electrode for a lithium secondary battery, which has a large volume capacity density and high safety, and is excellent in the charge and discharge cyclic durability and low temperature characteristics. A process for producing a lithium-containing composite oxide represented by the formula LipNxMyOzFa (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than N, 0.9?p?1.2, 0.95?x?2.00, 0<y?0.05, 1.9?z?4.2 and 0?a?0.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: October 8, 2013
    Assignee: AGC Seimi Chemical Co., Ltd.
    Inventors: Ryoji Yamada, Koji Tatsumi, Shogo Nakaoka, Kenji Ito, Kazuya Hiratsuka
  • Patent number: 8287828
    Abstract: A process for producing a lithium-containing composite oxide for a positive electrode active material for use in a lithium secondary battery, the oxide having the formula LipQqNxMyOzFa (wherein Q is at least one element selected from the group consisting of titanium, zirconium, niobium and tantalum, N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than Q and N, 0.9?p?1.1, 0?q<0.03, 0.97?x?1.00, 0?y<0.03, 1.9?z?2.1, q+x+y=1 and 0?a?0.02), which comprises firing a mixture of a lithium, Q element source and N element sources, and an M element source and/or fluorine source when these elements are present, in an oxygen-containing atmosphere, wherein the Q element source is a Q element compound aqueous solution having a pH of from 0.5 to 11.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: October 16, 2012
    Assignee: AGC Seimi Chemical Co., Ltd.
    Inventors: Takeshi Kawasato, Naoshi Saito, Megumi Uchida, Kazushige Horichi, Koji Tatsumi, Kunihiko Terase, Manabu Suhara
  • Patent number: 7935305
    Abstract: The present invention relates to hydrogen storage alloys, methods for producing the same, and anodes produced with such alloys for nickel-hydrogen rechargeable batteries. The alloys are useful as electrode materials for nickel-hydrogen rechargeable batteries, excellent, when used as anode materials, in corrosion resistance or activity such as initial activity and high rate discharge performance, of low cost compared to the conventional alloys with a higher Co content, and recyclable. The alloys are of a composition represented by the formula (1), and has a substantially single phase structure, and the crystals thereof have an average long axis diameter of 30 to 160 ?m, or not smaller than 5 ?m and smaller than 30 ?m. The present anodes for rechargeable batteries contain at least one of these hydrogen storage alloys: RNixCoyMz??(1) (R: rare earth elements etc., M: Mg, Al, etc., 3.7?x?5.3, 0.1?y?5.0, 0.1?z?1.0, 5.1?x+y+z?5.5).
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: May 3, 2011
    Assignee: Santoku Corporation
    Inventors: Kiyofumi Takamaru, Hideaki Ikeda, Koji Tatsumi
  • Publication number: 20100301283
    Abstract: The present invention relates to hydrogen storage alloys, methods for producing the same, and anodes produced with such alloys for nickel-hydrogen rechargeable batteries. The alloys are useful as electrode materials for nickel-hydrogen rechargeable batteries, excellent, when used as anode materials, in corrosion resistance or activity such as initial activity and high rate discharge performance, of low cost compared to the conventional alloys with a higher Co content, and recyclable. The alloys are of a composition represented by the formula (1), and has a substantially single phase structure, and the crystals thereof have an average long axis diameter of 30 to 160 ?m, or not smaller than 5 ?m and smaller than 30 ?m. The present anodes for rechargeable batteries contain at least one of these hydrogen storage alloys. RNixCoyMz??(1) (R: rare earth elements etc., M: Mg, Al, etc., 3.7?x?5.3, 0.1?y?5.0, 0.1?z?1.0, 5.1?x+y+z?5.
    Type: Application
    Filed: June 4, 2010
    Publication date: December 2, 2010
    Applicant: SANTOKU CORPORATION
    Inventors: Kiyofumi Takamaru, Hideaki Ikeda, Koji Tatsumi
  • Publication number: 20100196761
    Abstract: To provide a transition metal compound granule serving as a raw material for a cathode active material for a lithium secondary battery, which has high packing density, large volume capacity density and high safety and which is excellent in durability for charge and discharge cycles. A transition metal compound granule serving as a raw material for a positive electrode material for a lithium ion secondary battery, which comprises particles containing at least one element selected from the group consisting of nickel, cobalt and manganese and having an average particle size of the primary particles being at most 1 ?m and which is substantially spherical and has an average particle size D50 of from 10 to 40 ?m and an average pore size of at most 1 ?m.
    Type: Application
    Filed: March 31, 2010
    Publication date: August 5, 2010
    Applicant: AGC Seimi Chemical Co., Ltd.
    Inventors: Koji Tatsumi, Yuki Nagura, Kazuya Hiratsuka
  • Patent number: 7724751
    Abstract: A first communication device receives an ATM cell bound for a second ATM device from a first ATM device via an ATM interface, and then the first communication device sends a data frame including the ATM cell to the second ATM device via wide area Ethernet. In addition, the first communication device sends a synchronization frame to the second ATM device via the wide area Ethernet continuously at a predetermined time interval in accordance with a clock frequency of the first ATM device. A second communication device receives the synchronization frame and measures a clock frequency of the first ATM device in accordance with a time interval of receiving the synchronization frame so as to reproduce a clock having the same frequency as the measured clock frequency. After that, the second communication device sends the clock to the second ATM device via an ATM interface.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: May 25, 2010
    Assignee: Fujitsu Limited
    Inventors: Norihisa Uchimoto, Koji Tatsumi, Kazuhisa Shimazaki, Koichiro Yamada, Satoshi Namura, Akio Morimoto, Michio Kusayanagi
  • Patent number: 7709148
    Abstract: To provide a process for producing a lithium-containing composite oxide for a positive electrode of a lithium secondary battery, which has a large volume capacity density, high safety, excellent durability for charge and discharge cycles and excellent low temperature characteristics.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: May 4, 2010
    Assignee: AGC Seimi Chemical Co., Ltd.
    Inventors: Takeshi Kawasato, Tokumitsu Kato, Naoshi Saito, Koji Tatsumi, Megumi Uchida, Remi Hiraki
  • Patent number: 7615315
    Abstract: A positive electrode material for a lithium secondary battery for high voltage high capacity use exhibiting high cycle durability and high safety. The positive electrode material is composed of particles having a composition represented by the general formula: LiaCobMgcAdOeFf (A is the group 6 transition element or the group 14 element, 0.90?a?1.10, 0.97?b?1.00, 0.0001?c?0.03, 0.0001?d?0.03, 1.98?e?2.02, 0?f?0.02 and 0.0001?c+d?0.03), and magnesium, the element A and fluorine exist uniformly in the vicinity of the surfaces of the particles.
    Type: Grant
    Filed: August 16, 2004
    Date of Patent: November 10, 2009
    Assignee: Seimi Chemical Co., Ltd.
    Inventors: Koji Tatsumi, Toshiaki Abe, Naoshi Saito, Manabu Suhara
  • Publication number: 20090252169
    Abstract: A first communication device receives an ATM cell bound for a second ATM device from a first ATM device via an ATM interface, and then the first communication device sends a data frame including the ATM cell to the second ATM device via wide area Ethernet. In addition, the first communication device sends a synchronization frame to the second ATM device via the wide area Ethernet continuously at a predetermined time interval in accordance with a clock frequency of the first ATM device. A second communication device receives the synchronization frame and measures a clock frequency of the first ATM device in accordance with a time interval of receiving the synchronization frame so as to reproduce a clock having the same frequency as the measured clock frequency. After that, the second communication device sends the clock to the second ATM device via an ATM interface.
    Type: Application
    Filed: June 11, 2009
    Publication date: October 8, 2009
    Applicant: Fujitsu Limited
    Inventors: Norihisa UCHIMOTO, Koji Tatsumi, Kazuhisa Shimazaki, Koichiro Yamada, Satoshi Namura, Akio Morimoto, Michio Kusayanagi
  • Publication number: 20090243731
    Abstract: An apparatus includes an oscillator, a memory for storing data of a first frequency and of a first voltage, a first controller for causing the oscillator to generate a clock having a required frequency by applying a voltage on the basis of the data of the first frequency and of the first voltage, a second controller for causing the oscillator to generate a clock having a second frequency by applying a second voltage at predetermined timing, an output section for outputting data of the clock of the second frequency to a frequency counter, a writing section for updating the data of the first voltage to data of the second voltage and the data of the first frequency to data of the second frequency when a difference between the second frequency and a third frequency is within a predetermine range.
    Type: Application
    Filed: March 5, 2009
    Publication date: October 1, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Koji TATSUMI, Norihisa Uchimoto, Kazuhisa Shimazaki
  • Patent number: 7504180
    Abstract: There is obtained a material of a positive electrode for a secondary lithium-ion cell having high cycle durability and high safety in high-voltage and high-capacity applications, which is a particulate positive electrode active material for a secondary lithium-ion cell represented by a general formula, LiaCObAcBdOeFf (A is Al or Mg, B is a group-IV transition element, 0.90?a?1.10, 0.97?b?1.00, 0.0001?c?0.03, 0.0001?d?0.03, 1.98?e?2.02, 0?f?0.02, and 0.0001?c+d?0.03), where element A, element B and fluorine are evenly present in the vicinity of the particle surfaces.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: March 17, 2009
    Assignee: Seimi Chemical Co., Ltd.
    Inventors: Koji Tatsumi, Manabu Suhara, Naoshi Saito, Kazushige Horichi, Yukio Jitsugiri
  • Publication number: 20080131780
    Abstract: To provide a process for producing a lithium-containing composite oxide for a positive electrode of a lithium secondary battery, which has a large volume capacity density, high safety, excellent durability for charge and discharge cycles and excellent low temperature characteristics.
    Type: Application
    Filed: December 7, 2007
    Publication date: June 5, 2008
    Applicant: AGC Seimi Chemical Co., Ltd.
    Inventors: Takeshi KAWASATO, Tokumitsu Kato, Naoshi Satio, Koji Tatsumi, Megumi Uchida, Remi Hiraki
  • Publication number: 20080014502
    Abstract: The present invention relates to hydrogen storage alloys, methods for producing the same, and anodes produced with such alloys for nickel-hydrogen rechargeable batteries. The alloys are useful as electrode materials for nickel-hydrogen rechargeable batteries, excellent, when used as anode materials, in corrosion resistance or activity such as initial activity and high rate discharge performance, of low cost compared to the conventional alloys with a higher Co content, and recyclable. The alloys are of a composition represented by the formula (1) and has a substantially single phase structure, and the crystals thereof have an average long axis diameter of 30 to 160 ?m, or not smaller than 5 ?m and smaller than 30 ?m. The present anodes for rechargeable batteries contain at least one of these hydrogen storage alloys. RNixCoyMz ??(1) (R: rare earth elements etc., M: Mg, Al, etc., 3.7?x?5.3, 0.1?y?0.5, 0.1?z?1.0, 5.1?x+y+z?5.
    Type: Application
    Filed: August 13, 2007
    Publication date: January 17, 2008
    Applicant: SANTOKU CORPORATION
    Inventors: Kiyofumi Takamaru, Hideaki Ikeda, Koji Tatsumi
  • Publication number: 20070264573
    Abstract: To provide a process for a lithium-containing composite oxide for a positive electrode for a lithium secondary battery, which has a large volume capacity density and high safety, and is excellent in the charge and discharge cyclic durability and low temperature characteristics. A process for producing a lithium-containing composite oxide represented by the formula LipNxMyOzFa (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than N, 0.9?p?1.2, 0.95?x?2.00, 0?y?0.05, 1.9?z?4.2 and 0?a?0.
    Type: Application
    Filed: July 25, 2007
    Publication date: November 15, 2007
    Applicant: AGC Seimi Chemical Co., Ltd.
    Inventors: Ryoji Yamada, Koji Tatsumi, Shogo Nakaoka, Kenji Ito, Kazuya Hiratsuka
  • Patent number: 7270797
    Abstract: To provide a process for producing a lithium-cobalt composite oxide for a positive electrode of a lithium secondary battery excellent in volume capacity density, safety, charge and discharge cyclic durability, press density and productivity, by using in expensive cobalt hydroxide and lithium carbonate. A mixture having a cobalt hydroxide powder and a lithium carbonate powder mixed so that the atomic ratio of lithium/cobalt would be from 0.98 to 1.01, is fired in an oxygen-containing atmosphere at from 250 to 700° C., and the fired product is further fired in an oxygen-containing atmosphere at from 850 to 1,050° C., or such a mixture is heated at a temperature-raising rate of at most 4° C./min in a range from 250 to 600° C. and fired in an oxygen-containing atmosphere at from 850 to 1,050° C.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: September 18, 2007
    Assignee: Seimi Chemical Co., Ltd.
    Inventors: Manabu Suhara, Naoshi Saito, Kazushige Horichi, Koji Tatsumi
  • Patent number: 7160502
    Abstract: The present invention relates to a method for readily producing an anode for rechargeable batteries having conflicting properties in good balance, including the corrosion resistance and the activities such as the initial activity and the high rate discharge performance, and having excellent recyclability. The method includes the steps of mixing and molding anode materials containing an electrically conductive material and at least two kinds of AB5 type hydrogen storage alloys, wherein said alloys have substantially single phase structures and the same composition, wherein each of the alloys have an average crystal long axis diameter of 30 to 350 ?m, and wherein the alloys have different ratios (D1/D2) of the average crystal long axis diameter (D1) to the average short axis diameter (D2).
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: January 9, 2007
    Assignee: Santoku Corporation
    Inventors: Kiyofumi Takamaru, Hideaki Ikeda, Koji Tatsumi