Patents by Inventor Takashi Obikawa

Takashi Obikawa 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).

  • Anthracene derivative and organic electroluminescence device using the same
    Patent number: 9461251
    Abstract: Provided are a novel anthracene derivative of a specific structure in which benzofuran or benzothiophene is bonded to anthracene through an arylene group, a material for an organic electroluminescence device and a light emitting material for an organic electroluminescence device each containing the anthracene derivative, and an organic electroluminescence device including an organic thin film layer formed of one or plural layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the anthracene derivative alone or as a component of a mixture. The organic electroluminescence device has high luminous efficiency and is capable of emitting light with a long lifetime, and the device can be realized by the anthracene derivative.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: October 4, 2016
    Assignees: IDEMITSU KOSAN CO., LTD., SONY CORPORATION
    Inventors: Masahiro Kawamura, Takashi Obikawa, Shigeyuki Matsunami, Ichinori Takada, Yasunori Kijima
  • Porous carbon material, adsorbent, oral adsorbent, medical adsorbent, filler for blood purification column, water purification adsorbent, cleansing agent, carrier, sustained release pharmaceutical, cell culture scaffold, mask, carbon/polymer composite, adsorbent sheet and functional food
    Patent number: 9421515
    Abstract: [Object] To provide a porous carbon material that is able to adsorb desired substances efficiently. [Solving Means] A porous carbon material of the present invention uses peat as a raw material, and has a total of volumes of fine pores having a diameter of from 1×10?8 m to 2×10?7 m, obtained by non-localized density functional theory method, of 0.5 cm3/g or more, or has a volume of fine pores obtained by BHJ method of 0.5 cm3/g or more.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: August 23, 2016
    Assignee: SONY CORPORATION
    Inventors: Makoto Yoshizaki, Hironori Iida, Takashi Obikawa, Shinichiro Yamada, Seiichiro Tabata, Kazuma Usami, Masakazu Mitsugi, Hirotsugu Ishihara, Shun Yamanoi, Machiko Minatoya
  • POROUS CARBON MATERIAL, ADSORBENT, ORAL ADSORBENT, MEDICAL ADSORBENT, FILLER FOR BLOOD PURIFICATION COLUMN, WATER PURIFICATION ADSORBENT, CLEANSING AGENT, CARRIER, SUSTAINED RELEASE PHARMACEUTICAL, CELL CULTURE SCAFFOLD, MASK, CARBON/POLYMER COMPOSITE, ADSORBENT SHEET AND FUNCTIONAL FOOD
    Publication number: 20140011666
    Abstract: [Object] To provide a porous carbon material that is able to adsorb desired substances efficiently. [Solving Means] A porous carbon material of the present invention uses peat as a raw material, and has a total of volumes of fine pores having a diameter of from 1×10?8 m to 2×10?7 m, obtained by non-localized density functional theory method, of 0.5 cm3/g or more, or has a volume of fine pores obtained by BHJ method of 0.5 cm3/g or more.
    Type: Application
    Filed: March 7, 2012
    Publication date: January 9, 2014
    Applicant: SONY CORPORATION
    Inventors: Makoto Yoshizaki, Hironori Lida, Takashi Obikawa, Shinichiro Yamada, Seiichiro Tabata, Kazuma Usami, Masakazu Mitsugi, Hirotsugu Ishihara, Shun Yamanoi, Machiko Minatoya
  • ANTHRACENE DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME
    Publication number: 20130313538
    Abstract: Provided are a novel anthracene derivative of a specific structure in which benzofuran or benzothiophene is bonded to anthracene through an arylene group, a material for an organic electroluminescence device and a light emitting material for an organic electroluminescence device each containing the anthracene derivative, and an organic electroluminescence device including an organic thin film layer formed of one or plural layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the anthracene derivative alone or as a component of a mixture. The organic electroluminescence device has high luminous efficiency and is capable of emitting light with a long lifetime, and the device can be realized by the anthracene derivative.
    Type: Application
    Filed: July 31, 2013
    Publication date: November 28, 2013
    Applicants: Sony Corporation, Idemitsu Kosan Co., Ltd.
    Inventors: Masahiro KAWAMURA, Takashi Obikawa, Shigeyuki Matsunami, Ichinori Takada, Yasunori Kijima
  • Anthracene derivative and organic electroluminescence device using the same
    Patent number: 8512875
    Abstract: Provided are a novel anthracene derivative of a specific structure in which benzofuran or benzothiophene is bonded to anthracene through an arylene group, a material for an organic electroluminescence device and a light emitting material for an organic electroluminescence device each containing the anthracene derivative, and an organic electroluminescence device including an organic thin film layer formed of one or plural layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the anthracene derivative alone or as a component of a mixture. The organic electroluminescence device has high luminous efficiency and is capable of emitting light with a long lifetime, and the device can be realized by the anthracene derivative.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: August 20, 2013
    Assignees: Idemitsu Kosan Co., Ltd., Sony Corporation
    Inventors: Masahiro Kawamura, Takashi Obikawa, Shigeyuki Matsunami, Ichinori Takada, Yasunori Kijima
  • ANTHRACENE DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME
    Publication number: 20080315754
    Abstract: Provided are a novel anthracene derivative of a specific structure in which benzofuran or benzothiophene is bonded to anthracene through an arylene group, a material for an organic electroluminescence device and a light emitting material for an organic electroluminescence device each containing the anthracene derivative, and an organic electroluminescence device including an organic thin film layer formed of one or plural layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the anthracene derivative alone or as a component of a mixture. The organic electroluminescence device has high luminous efficiency and is capable of emitting light with a long lifetime, and the device can be realized by the anthracene derivative.
    Type: Application
    Filed: May 21, 2008
    Publication date: December 25, 2008
    Applicants: Idemitsu Kosan Co., Ltd., Sony Corporation
    Inventors: Masahiro KAWAMURA, Takashi Obikawa, Shigeyuki Matsunami, Ichinori Takada, Yasunori Kijima