Patents by Inventor Daisuke IIJIMA

Daisuke IIJIMA 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: 10793582
    Abstract: Provided are a novel compound having a superior inhibitory action on KAT-II, a production method thereof, use thereof, and a pharmaceutical composition containing the aforementioned compound and the like. A compound represented by the formula (I) or a pharmacologically acceptable salt thereof. wherein each symbol is as defined in the DESCRIPTION.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: October 6, 2020
    Assignee: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Masahiro Okuyama, Kenji Fukunaga, Kenji Usui, Norimitsu Hayashi, Daisuke Iijima, Hideki Horiuchi, Nobuaki Fujimoto
  • Publication number: 20190233438
    Abstract: Provided are a novel compound having a superior inhibitory action on KAT-II, a production method thereof, use thereof, and a pharmaceutical composition containing the aforementioned compound and the like. A compound represented by the formula (I) or a pharmacologically acceptable salt thereof. wherein each symbol is as defined in the DESCRIPTION.
    Type: Application
    Filed: October 21, 2016
    Publication date: August 1, 2019
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Masahiro OKUYAMA, Kenji FUKUNAGA, Kenji USUI, Norimitsu HAYASHI, Daisuke IIJIMA, Hideki HORIUCHI, Nobuaki FUJIMOTO
  • Patent number: 10065972
    Abstract: The present invention provides a novel bicyclic or tricyclic heterocyclic compound represented by the formula (I) wherein ring A is an optionally substituted aromatic group, one of X1 and X2 is a carbon atom, and the other is a nitrogen atom, X3 is a nitrogen atom, or CR2, X4 is a nitrogen atom, or CR3, X5 is a sulfur atom, or —CH?CH—, Z1 is an oxygen atom, —C(R6)(R7)—, —NH—, —C(R6)(R7)—NH—, —NH—C(R6)(R7)—, —C(R6)(R7)—O—, —O—C(R6)(R7)—, or a single bond, one of Z2 and Z3 is CH and the other is a nitrogen atom, or both are nitrogen atoms, and other symbols are as defined in the DESCRIPTION, or a pharmacologically acceptable salt thereof.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: September 4, 2018
    Assignee: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Masahiro Okuyama, Kenji Fukunaga, Kenji Usui, Norimitsu Hayashi, Daisuke Iijima, Hideki Horiuchi, Noriaki Itagaki
  • Patent number: 9935577
    Abstract: A method of detecting a fault of a semiconductor device including a power device mounted on a metal base and a drive circuit for driving the power device, the method detecting a fault of the semiconductor device beforehand based on an increase in thermal resistance between the metal base and the power device. A state of the power device is measured immediately before and after the power device is driven by the drive circuit. A temperature difference of the power device before and after driving is calculated according to the result of measurement. An increase in thermal resistance between the metal base and the power device is detected based on the temperature difference and an amount of electricity inputted to the power device in the driving period, and a fault of the semiconductor device is detected beforehand according to the increase.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: April 3, 2018
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Katsutoshi Bito, Daisuke Iijima, Yuji Takehara
  • Patent number: 9783522
    Abstract: Provided is a compound superior in an autotaxin inhibitory action and the like, effective as a prophylactic or therapeutic drug for diseases involving ATX. The present invention relates to a compound represented by the following formula (I): [wherein each symbol is as described in the DESCRIPTION], which has a superior autotaxin inhibitory action and is useful as a prophylactic or therapeutic drug for diseases involving ATX.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: October 10, 2017
    Assignee: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Taichi Takahashi, Akinori Umino, Daisuke Iijima, Hisayuki Takamatsu
  • Patent number: 9755543
    Abstract: Switching loss is reduced by decreasing the switching frequency of a PFC power supply in light load condition, whereas the switching frequency is maintained high in heavy load operation. Efficiency in light load operation is thus improved without enlarging a boosting inductor and an output smoothing capacitor. A capacitor is provided in a triangular wave generating circuit and the triangular wave generating circuit outputs a triangular wave by charging and discharging this capacitor. Charging and discharging of the capacitor are controlled by an oscillation frequency control circuit output current which is input to a comparator.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: September 5, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Kazuhito Ayukawa, Nobutoshi Kasai, Daisuke Iijima
  • Publication number: 20170044133
    Abstract: Provided is a compound superior in an autotaxin inhibitory action and the like, effective as a prophylactic or therapeutic drug for diseases involving ATX. The present invention relates to a compound represented by the following formula (I): [wherein each symbol is as described in the DESCRIPTION], which has a superior autotaxin inhibitory action and is useful as a prophylactic or therapeutic drug for diseases involving ATX.
    Type: Application
    Filed: April 24, 2015
    Publication date: February 16, 2017
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Taichi TAKAHASHI, Akinori UMINO, Daisuke IIJIMA, Hisayuki TAKAMATSU
  • Publication number: 20170003337
    Abstract: An obtained margin is smaller than a margin to be kept for a fault period predicted by life prediction based on a power cycle test, extending a maintenance cycle for replacement and so on. A method of detecting a fault of a semiconductor device including a power device mounted on a metal base and a drive circuit for driving the power device, the method detecting a fault of the semiconductor device beforehand based on an increase in thermal resistance between the metal base and the power device. A state of the power device is measured immediately before and after the power device is driven by the drive circuit. A temperature difference of the power device before and after driving is calculated according to the result of measurement.
    Type: Application
    Filed: April 13, 2016
    Publication date: January 5, 2017
    Inventors: Katsutoshi BITO, Daisuke IIJIMA, Yuji TAKEHARA
  • Publication number: 20160376289
    Abstract: The present invention provides a novel bicyclic or tricyclic heterocyclic compound represented by the formula (I) wherein ring A is an optionally substituted aromatic group, one of X1 and X2 is a carbon atom, and the other is a nitrogen atom, X3 is a nitrogen atom, or CR2, X4 is a nitrogen atom, or CR3, X5 is a sulfur atom, or —CH?CH—, Z1 is an oxygen atom, —C(R6)(R7)—, —NH—, —C(R6)(R7)—NH—, —NH—C(R6)(R7)—, —C(R6)(R7)—O—, —O—C(R6)(R7)—, or a single bond, one of Z2 and Z3 is CH and the other is a nitrogen atom, or both are nitrogen atoms, and other symbols are as defined in the DESCRIPTION, or a pharmacologically acceptable salt thereof.
    Type: Application
    Filed: April 22, 2015
    Publication date: December 29, 2016
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Masahiro OKUYAMA, Kenji FUKUNAGA, Kenji USUI, Norimitsu HAYASHI, Daisuke IIJIMA, Hideki HORIUCHI, Noriaki ITAGAKI
  • Publication number: 20140321174
    Abstract: Switching loss is reduced by decreasing the switching frequency of a PFC power supply in light load condition, whereas the switching frequency is maintained high in heavy load operation. Efficiency in light load operation is thus improved without enlarging a boosting inductor and an output smoothing capacitor. A capacitor is provided in a triangular wave generating circuit and the triangular wave generating circuit outputs a triangular wave by charging and discharging this capacitor. Charging and discharging of the capacitor are controlled by an oscillation frequency control circuit output current which is input to a comparator.
    Type: Application
    Filed: July 14, 2014
    Publication date: October 30, 2014
    Inventors: Kazuhito AYUKAWA, Nobutoshi KASAI, Daisuke IIJIMA
  • Patent number: 8810230
    Abstract: Switching loss is reduced by decreasing the switching frequency of a PFC power supply in light load condition, whereas the switching frequency is maintained high in heavy load operation. Efficiency in light load operation is thus improved without enlarging a boosting inductor and an output smoothing capacitor. A capacitor is provided in a triangular wave generating circuit and the triangular wave generating circuit outputs a triangular wave by charging and discharging this capacitor. Charging and discharging of the capacitor are controlled by an oscillation frequency control circuit output current which is input to a comparator.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: August 19, 2014
    Assignee: Renesas Electronics Corporation
    Inventors: Kazuhito Ayukawa, Nobutoshi Kasai, Daisuke Iijima
  • Publication number: 20110255319
    Abstract: Switching loss is reduced by decreasing the switching frequency of a PFC power supply in light load condition, whereas the switching frequency is maintained high in heavy load operation. Efficiency in light load operation is thus improved without enlarging a boosting inductor and an output smoothing capacitor. A capacitor is provided in a triangular wave generating circuit and the triangular wave generating circuit outputs a triangular wave by charging and discharging this capacitor. Charging and discharging of the capacitor are controlled by an oscillation frequency control circuit output current which is input to a comparator.
    Type: Application
    Filed: March 21, 2011
    Publication date: October 20, 2011
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventors: Kazuhito AYUKAWA, Nobutoshi KASAI, Daisuke IIJIMA
  • Publication number: 20110242861
    Abstract: The present invention provides a method of improving efficiency in a full load region in a PFC power source of an active filter method by controlling a switch circuit of the PFC power source in association with an output power of the PFC power source. A pair of two switches controlling charging/discharging an inductor is provided. A MOSFET switch having a small current capacity is used as one of the switches, and an IGBT switch of a large current capacity is used as the other switch. When an output of a voltage dividing circuit for dividing voltage of an output terminal of the PFC power source is smaller than a threshold voltage, only the MOSFET switch is operated. When the output exceeds a threshold voltage, the IGBT switch is also operated.
    Type: Application
    Filed: March 9, 2011
    Publication date: October 6, 2011
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventors: Kazuhito AYUKAWA, Nobutoshi KASAI, Kenya YAMAUCHI, Takamitsu KANAZAWA, Daisuke IIJIMA, Mamoru KITAMURA, Makoto NAKAMURA