Patents by Inventor Motohiro Takeshima

Motohiro Takeshima 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: 20200266304
    Abstract: A laminated body comprising a substrate, one or more layers selected from a contact resistance reducing layer and a reduction suppressing layer, a Schottky electrode layer and a metal oxide semiconductor layer in this order.
    Type: Application
    Filed: December 26, 2016
    Publication date: August 20, 2020
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoshihiro UEOKA, Takashi SEKIYA, Shigekazu TOMAI, Emi KAWASHIMA, Yuki TSURUMA, Motohiro TAKESHIMA
  • Publication number: 20190218145
    Abstract: An oxide sintered body includes a bixbyite phase represented by In2O3, and a garnet phase represented by Y3In2Ga3O12.
    Type: Application
    Filed: June 16, 2017
    Publication date: July 18, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Kazuyoshi INOUE, Shigekazu TOMAI, Masatoshi SHIBATA, Motohiro TAKESHIMA
  • Patent number: 10340356
    Abstract: A laminated body comprising a substrate, an ohmic electrode layer, a metal oxide semiconductor layer, a Schottky electrode layer and a buffer electrode layer in this order, wherein a reduction suppressing layer is provided between the Schottky electrode layer and the buffer electrode layer.
    Type: Grant
    Filed: December 26, 2016
    Date of Patent: July 2, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Emi Kawashima, Takashi Sekiya, Yuki Tsuruma, Yoshihiro Ueoka, Shigekazu Tomai, Motohiro Takeshima
  • Publication number: 20190013389
    Abstract: A laminated body comprising a substrate, an ohmic electrode layer, a metal oxide semiconductor layer, a Schottky electrode layer and a buffer electrode layer in this order, wherein a reduction suppressing layer is provided between the Schottky electrode layer and the buffer electrode layer.
    Type: Application
    Filed: December 26, 2016
    Publication date: January 10, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Emi KAWASHIMA, Takashi SEKIYA, Yuki TSURUMA, Yoshihiro UEOKA, Shigekazu TOMAI, Motohiro TAKESHIMA
  • Patent number: 9290691
    Abstract: An organic luminescent material-containing solution contains an organic electroluminescent material and a solvent. The organic electroluminescent material at least contains a host and a dopant. The host is an anthracene derivative and is dissolved in the solvent with a content of 0.5 mass percent or more. The solvent is preferably a cyclic ketone. The solvent preferably contains a cyclohexanone derivative as the cyclic ketone.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: March 22, 2016
    Assignees: IDEMITSU KOSAN CO., LTD., SONY CORPORATION
    Inventors: Motohiro Takeshima, Tetsuya Inoue, Makoto Ando
  • Patent number: 8298733
    Abstract: In an electrophotographic apparatus (e.g., a photocopier or laser printer), an electrophotographic photosensitive member (image-forming part) has a metal substrate roughened on its surface, a metal oxide-containing undercoat layer on the substrate, and an organic photosensitive layer over the undercoat. A coherent light source (e.g., laser) can cause interference fringes that degrade the printed image. Interference fringes are judged (or predicted) as follows: The surface reflectance is measured at intervals over the spectral width of the light source. The measured surface reflectance is corrected, using a mirror-surface conductive substrate as a reference, to obtain a reflectance of the photosensitive member. The reflectance is subjected to a discrete Fourier transformation, which generates a power spectrum, over the spectral width of the light source, from the reflectance as a function of the wavelength.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: October 30, 2012
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Motohiro Takeshima
  • Publication number: 20110226992
    Abstract: An organic electroluminescence material composition including an organic electroluminescence material and a solvent, the organic electroluminescence material being a naphthacene derivative, and the solvent being a solvent which is represented by the following formula (1).
    Type: Application
    Filed: September 16, 2009
    Publication date: September 22, 2011
    Inventors: Motohiro Takeshima, Kiyoshi Ikeda, Takayasu Sado, Tetsuya Inoue, Yoshiaki Obana, Yukio Miyaki, Keisuke Matsuo, Yasunori Kijima
  • Publication number: 20110220886
    Abstract: An organic electroluminescence material composition including a solvent represented by the following formula (1) and an anthracene derivative: wherein ring A is an aliphatic ring or an aromatic ring having 4 to 8 carbon atoms; R1 is a substituent on the ring A; and R2 and R3 are substituents connected to adjacent carbon atoms on the ring A.
    Type: Application
    Filed: September 16, 2009
    Publication date: September 15, 2011
    Applicants: IDEMITSU KOSAN CO., LTD., SONY CORPORATION
    Inventors: Motohiro Takeshima, Atau Ioku, Tetsuya Inoue, Yoshiaki Obana, Yukio Miyaki, Keisuke Matsuo, Yasunori Kijima
  • Publication number: 20100117028
    Abstract: An organic luminescent material-containing solution contains an organic electroluminescent material and a solvent. The organic electroluminescent material at least contains a host and a dopant. The host is an anthracene derivative and is dissolved in the solvent with a content of 0.5 mass percent or more. The solvent is preferably a cyclic ketone. The solvent preferably contains a cyclohexanone derivative as the cyclic ketone.
    Type: Application
    Filed: February 27, 2008
    Publication date: May 13, 2010
    Applicants: IDEMITSU KOSAN CO., LTD., SONY CORPORATION
    Inventors: Motohiro Takeshima, Tetsuya Inoue, Makoto Ando
  • Publication number: 20090317733
    Abstract: Disclosed is a compound having excellent electron transporting ability, which is useful for electrophotographic photosensitive bodies or organic EL devices. Specifically disclosed is a novel quinone compound having a structure represented by general formula (I). Also disclosed is a highly sensitive, positive charge type electrophotographic photosensitive body for copying machines and printers, wherein the novel organic material is used as a charge-transporting material in a photosensitive layer. Also specifically disclosed is an electrophotographic photosensitive body having a photosensitive layer formed on a conductive base and containing a charge-generating material and a charge-transporting material, wherein the photosensitive layer contains at least one of the above-described compounds. Further disclosed is an electrophotographic apparatus using such a positive charge type electrophotographic photosensitive body.
    Type: Application
    Filed: January 17, 2007
    Publication date: December 24, 2009
    Applicant: Fuji Electric Device Technology Co., Ltd.
    Inventors: Kenichi Okura, Yoichi Nakamura, Motohiro Takeshima, Yoshiki Hasegawa, Hiroyuki Kenmochi, Tohru Kobayashi
  • Publication number: 20080206447
    Abstract: An organic luminescent material-containing solution contains an organic electroluminescent material and a solvent. The organic electroluminescent material at least contains a host and dopant, and the host is an anthracene derivative. The host is dissolved in the solvent with a content of 0.5 weight percent or more while the solvent exhibits viscosity of 5 cP or more. The solvent contains an alkyl-substituted biphenyl that has an alkyl group having 1 to 10 carbon atoms as a substituent.
    Type: Application
    Filed: February 28, 2008
    Publication date: August 28, 2008
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Tetsuya Inoue, Masahiko Fukuda, Motohiro Takeshima, Chishio Hosokawa
  • Publication number: 20070009819
    Abstract: A compound useful for a positive charge type electrophotographic photoreceptor with high sensitivity for copiers and printers by using such a novel organic material as a charge transport substance in a photosensitive layer and an electrophotographic apparatus using the same. The compound has a structure represented by the following general formula (I). (In the general formula (I), R1, R2, R3, and R4 each is an alkyl group or the like; R5 and R6 each-is an aryl group or the like; and Z represents a structure having the following general formula (F-A), (F-B) or (F-C). (In the formulae, R7 and R8 each is an optionally substituted alkyl group; m and n each represents an integer of from 0 to 2; and X is a sulfur atom or an oxygen atom.).
    Type: Application
    Filed: July 1, 2004
    Publication date: January 11, 2007
    Inventors: Nobuyuki Sekine, Masami Kuroda, Kenichi Ohkura, Yoshihiro Ueno, Motohiro Takeshima
  • Publication number: 20060204874
    Abstract: A compound having a superior electron-transporting property useful for electrophotographic photoconductors and organic ELs, a positive charge type electrophotographic photoconductor for high sensitive copiers or printers and an electrophotographic apparatus using the same, by using the organic compound in a photosensitive layer as an electron-transporting material are provided. The present invention relates a quinone compound having a structure represented by Formula (I): (wherein R1, R2, R3, R4, R5, R6, R7 and R8 each denote hydrogen or an alkyl; R9 and R10 each denote hydrogen, an alkyl, aryl, or heterocyclic group; R11 and R12 each denote a halogen, an alkyl, alkoxy, alkyl halide, nitro, aryl, or heterocyclic group; n and m each denote an integer of 0 to 4; A denotes oxygen or SO2; and the substituent is a halogen, an alkyl, alkoxy, alkyl halide, nitro, aryl, or heterocyclic group), an electrophotographic photoconductor, and an electrophotographic apparatus using the same.
    Type: Application
    Filed: March 14, 2006
    Publication date: September 14, 2006
    Inventors: Kenichi Ohkura, Motohiro Takeshima, Shinichi Omokawa, Yoshiki Hasegawa, Tohru Kobayashi
  • Publication number: 20050118520
    Abstract: In an electrophotographic apparatus (e.g., a photocopier or laser printer), an electrophotographic photosensitive member (image-forming part) has a metal substrate roughened on its surface, a metal oxide-containing undercoat layer on the substrate, and an organic photosensitive layer over the undercoat. A coherent light source (e.g., laser) can cause interference fringes that degrade the printed image. Interference fringes are judged (or predicted) as follows: The surface reflectance is measured at intervals over the spectral width of the light source. The measured surface reflectance is corrected, using a mirror-surface conductive substrate as a reference, to obtain a reflectance of the photosensitive member. The reflectance is subjected to a discrete Fourier transformation, which generates a power spectrum, over the spectral width of the light source, from the reflectance as a function of the wavelength.
    Type: Application
    Filed: November 10, 2004
    Publication date: June 2, 2005
    Inventor: Motohiro Takeshima
  • Patent number: 6535710
    Abstract: A function separated laminated electrophotography photosensitive body is equipped with at least a charge generating layer and a charge transport layer on top of a conductive substrate. A contact angle &thgr; of pure water on the charge transport layer satisfies the equation &thgr;>=94°. The resulting organic electrophotography photosensitive body prevents contamination of the photosensitive body surface resulting from component migration from the developing roller and achieves a stable image quality.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: March 18, 2003
    Assignee: Fuji Electric Imaging Device Co., Ltd.
    Inventors: Motohiro Takeshima, Haruo Kawakami
  • Publication number: 20020018948
    Abstract: A function separated laminated electrophotography photosensitive body is equipped with at least a charge generating layer and a charge transport layer on top of a conductive substrate. A contact angle &thgr; of pure water on the charge transport layer satisfies the equation &thgr;>=94°. The resulting organic electrophotography photosensitive body prevents contamination of the photosensitive body surface resulting from component migration from the developing roller and achieves a stable image quality.
    Type: Application
    Filed: May 24, 2001
    Publication date: February 14, 2002
    Inventors: Motohiro Takeshima, Haruo Kawakami
  • Publication number: 20010031410
    Abstract: An electrophotographic photoconductor has a conductive substrate and a photosensitive layer on the substrate.
    Type: Application
    Filed: February 27, 2001
    Publication date: October 18, 2001
    Inventors: Motohiro Takeshima, Osamu Nabeta
  • Patent number: 6045957
    Abstract: A metal carboxylate of the following general Formula (I), (II), or (III), ##STR1## wherein Ar.sub.1 represents an optionally substituted arylene group, Ar.sub.2 represents one of the group consisting of an alkyl group, an optionally substituted aryl group, an aralkyl group, and a hydrogen atom, X represents a metal atom selected from the group consisting of tin, zinc, cobalt, nickel, iron, and chromium, and n represents the valence of X, is added to the charge transport layer of a photoconductor for electrophotography. The resulting photoconductor exhibits excellent electric stability in repetitive use with little variation in electrically charged potential or residual potential.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: April 4, 2000
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Motohiro Takeshima, Haruo Kawakami
  • Patent number: 6001520
    Abstract: An electrophotographic photosensitive body has a charge generating layer and a charge transporting layer on a conductive substrate. The charge transporting layer contains a zinc carboxylate compound expressed by the following General Formula (I):(Ar--COO.sup.-)(R--COO.sup.-)Zn.sup.2+ [I]wherein:Ar is a substituted or unsubstituted aryl group andR is a substituted or unsubstituted alkenyl groupA method for the manufacture of the electrophotographic photosensitive body is also disclosed.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: December 14, 1999
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yoichi Nakamura, Motohiro Takeshima, Akira Ootani, Osamu Nabeta
  • Patent number: 5935746
    Abstract: A photosensitive body comprises a conductive substrate; a photosensitive layer on the conductive substrate, the photosensitive layer includes a charge transport compound wherein the charge transport compound is described by a general formula (I): ##STR1## wherein A is a phenyl or naphthyl group; each of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is a hydrogen atom, a halogen atom, an alkyl group with or without substitution, an alkoxy group, an alkylamino group, a nitro group, a cyano group, an aryl group with or without substitution, or a heterocyclic group with or without substitution; and each of R.sup.5 and R.sup.6 is a cyano group or an alkoxycarbonyl group.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: August 10, 1999
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Masami Kuroda, Motohiro Takeshima, Kei Yamaguchi