Patents by Inventor Keiichiro Yutani

Keiichiro Yutani 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: 9224959
    Abstract: A leaving substituent-containing compound including a partial structure represented by the following General Formula (I): where a pair of X1 and X2 or a pair of Y1 and Y2 each represent a hydrogen atom; the other pair each represent a group selected from the group consisting of a halogen atom and a substituted or unsubstituted acyloxy group having one or more carbon atoms; a pair of the acyloxy groups represented by the pair of X1 and X2 or the pair of Y1 and Y2 may be identical or different, or may be bonded together to form a ring; R1 to R4 each represent a hydrogen atom or a substituent; and Q1 and Q2 each represent a hydrogen atom, a halogen atom or a monovalent organic group, and may be bonded together to form a ring.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: December 29, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Goto, Satoshi Yamamoto, Toshiya Sagisaka, Takuji Kato, Takashi Okada, Masato Shinoda, Shinji Matsumoto, Masataka Mohri, Keiichiro Yutani
  • Patent number: 9123896
    Abstract: A leaving substituent-containing compound including a partial structure represented by the following General Formula (I): where a pair of X1 and X2 or a pair of Y1 and Y2 each represent a hydrogen atom; the other pair each represent a group selected from the group consisting of a halogen atom and a substituted or unsubstituted acyloxy group having one or more carbon atoms; a pair of the acyloxy groups represented by the pair of X1 and X2 or the pair of Y1 and Y2 may be identical or different, or may be bonded together to form a ring; R1 to R4 each represent a hydrogen atom or a substituent; and Q1 and Q2 each represent a hydrogen atom, a halogen atom or a monovalent organic group, and may be bonded together to form a ring.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: September 1, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Goto, Satoshi Yamamoto, Toshiya Sagisaka, Takuji Kato, Takashi Okada, Masato Shinoda, Shinji Matsumoto, Masataka Mohri, Keiichiro Yutani
  • Patent number: 8952181
    Abstract: An ink containing an organic semiconductive material precursor containing a dithienobenzodithiophene derivative of the following formula: X and Y are groups capable of bonding together upon application of an external stimulus to form a compound X—Y that is capable of eliminating from the dithienobenzodithiophene derivative; R1 and R2 are each independently a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and R3 to R10 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, or a substituted or unsubstituted aryl group.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: February 10, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiya Sagisaka, Satoshi Yamamoto, Takashi Okada, Masato Shinoda, Daisuke Goto, Shinji Matsumoto, Masataka Mohri, Keiichiro Yutani, Takuji Kato, Takanori Tano
  • Publication number: 20140187797
    Abstract: A leaving substituent-containing compound including a partial structure represented by the following General Formula (I): where a pair of X1 and X2 or a pair of Y1 and Y2 each represent a hydrogen atom; the other pair each represent a group selected from the group consisting of a halogen atom and a substituted or unsubstituted acyloxy group having one or more carbon atoms; a pair of the acyloxy groups represented by the pair of X1 and X2 or the pair of Y1 and Y2 may be identical or different, or may be bonded together to form a ring; R1 to R4 each represent a hydrogen atom or a substituent; and Q1 and Q2 each represent a hydrogen atom, a halogen atom or a monovalent organic group, and may be bonded together to form a ring.
    Type: Application
    Filed: February 4, 2014
    Publication date: July 3, 2014
    Inventors: Daisuke GOTO, Satoshi YAMAMOTO, Toshiya SAGISAKA, Takuji KATO, Takashi OKADA, Masato SHINODA, Shinji MATSUMOTO, Masataka MOHRI, Keiichiro YUTANI
  • Publication number: 20140175416
    Abstract: A leaving substituent-containing compound including a partial structure represented by the following General Formula (I): where a pair of X1 and X2 or a pair of Y1 and Y2 each represent a hydrogen atom; the other pair each represent a group selected from the group consisting of a halogen atom and a substituted or unsubstituted acyloxy group having one or more carbon atoms; a pair of the acyloxy groups represented by the pair of X1 and X2 or the pair of Y1 and Y2 may be identical or different, or may be bonded together to form a ring; R1 to R4 each represent a hydrogen atom or a substituent; and Q1 and Q2 each represent a hydrogen atom, a halogen atom or a monovalent organic group, and may be bonded together to form a ring.
    Type: Application
    Filed: February 4, 2014
    Publication date: June 26, 2014
    Inventors: Daisuke GOTO, Satoshi Yamamoto, Toshiya Sagisaka, Takuji Kato, Takashi Okada, Masato Shinoda, Shinji Matsumoto, Masataka Mohri, Keiichiro Yutani
  • Patent number: 8680296
    Abstract: A leaving substituent-containing compound including a partial structure represented by the following General Formula (I): where a pair of X1 and X2 or a pair of Y1 and Y2 each represent a hydrogen atom; the other pair each represent a group selected from the group consisting of a halogen atom and a substituted or unsubstituted acyloxy group having one or more carbon atoms; a pair of the acyloxy groups represented by the pair of X1 and X2 or the pair of Y1 and Y2 may be identical or different, or may be bonded together to form a ring; R1 to R4 each represent a hydrogen atom or a substituent; and Q1 and Q2 each represent a hydrogen atom, a halogen atom or a monovalent organic group, and may be bonded together to form a ring.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: March 25, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Goto, Satoshi Yamamoto, Toshiya Sagisaka, Takuji Kato, Takashi Okada, Masato Shinoda, Shinji Matsumoto, Masataka Mohri, Keiichiro Yutani
  • Publication number: 20140024841
    Abstract: An ink containing an organic semiconductive material precursor containing a dithienobenzodithiophene derivative of the following formula: X and Y are groups capable of bonding together upon application of an external stimulus to form a compound X-Y that is capable of eliminating from the dithienobenzodithiophene derivative; R1 and R2 are each independently a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and R3 to R10 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, or a substituted or unsubstituted aryl group.
    Type: Application
    Filed: September 27, 2013
    Publication date: January 23, 2014
    Inventors: Toshiya SAGISAKA, Satoshi YAMAMOTO, Takashi OKADA, Masato SHINODA, Daisuke GOTO, Shinji MATSUMOTO, Masataka MOHRI, Keiichiro YUTANI, Takuji KATO, Takanori TANO
  • Patent number: 8598570
    Abstract: An organic transistor array includes gate electrodes provided on a substrate, source and drain electrodes provided above or below the gate electrodes via a gate insulator layer, and an organic semiconductor layer opposing the gate electrodes via the gate insulator layer, and forming a channel region between mutually adjacent source and drain electrodes. The organic transistor array in a plan view is sectioned into sections each forming a single pixel, and each section has a closest packed structure.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: December 3, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiichiro Yutani, Takumi Yamaga, Atsushi Onodera
  • Patent number: 8575365
    Abstract: An organic semiconductive material precursor containing a dithienobenzodithiophene derivative expressed by General Formula I: in General Formula I, X and Y represent groups bonded together, upon application of external stimulus, to form X—Y which is eliminated from the compound expressed by General Formula I; R1 and R2 each represent a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and R3 to R10 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, or a substituted or unsubstituted aryl group.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: November 5, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiya Sagisaka, Satoshi Yamamoto, Takashi Okada, Masato Shinoda, Daisuke Goto, Shinji Matsumoto, Masataka Mohri, Keiichiro Yutani, Takuji Kato, Takanori Tano
  • Publication number: 20130096320
    Abstract: An organic semiconductive material precursor containing a dithienobenzodithiophene derivative expressed by General Formula I: in General Formula I, X and Y represent groups bonded together, upon application of external stimulus, to form X—Y which is eliminated from the compound expressed by General Formula I; R1 and R2 each represent a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and R3 to R10 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, or a substituted or unsubstituted aryl group.
    Type: Application
    Filed: June 14, 2011
    Publication date: April 18, 2013
    Inventors: Toshiya Sagisaka, Satoshi Yamamoto, Takashi Okada, Masato Shinoda, Daisuke Goto, Shinji Matsumoto, Masataka Mohri, Keiichiro Yutani, Takuji Kato, Takanori Tano
  • Publication number: 20130095605
    Abstract: A leaving substituent-containing compound represented by General Formula (I), wherein the leaving substituent-containing compound can be converted to a compound represented by General Formula (Ia) and a compound represented by General Formula (II), by applying energy to the leaving substituent-containing compound, in General Formulas (I), (Ia) and (II), X and Y each represent a hydrogen atom or a leaving substituent, where one of X and Y is the leaving substituent and the other is the hydrogen atom; Q2 to Q5 each represent a hydrogen atom, a halogen atom or a monovalent organic group; Q1 and Q6 each represent a hydrogen atom or a monovalent organic group other than the leaving substituent; and among the monovalent organic groups represented by Q1 to Q6, adjacent monovalent organic groups may be linked together to form a ring.
    Type: Application
    Filed: June 14, 2011
    Publication date: April 18, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Daisuke Goto, Satoshi Yamamoto, Toshiya Sagisaka, Takuji Kato, Takanori Tano, Masato Shinoda, Shinji Matsumoto, Masataka Mohri, Keiichiro Yutani
  • Patent number: 8207528
    Abstract: An organic transistor includes a substrate; a gate electrode and a gate insulating film sequentially formed on the substrate in the stated order; and a source electrode, a drain electrode, and an organic semiconductor layer formed on at least the gate insulating film. Ultraviolet light is radiated to the substrate from a side without the gate electrode, transmitted through the substrate and the gate insulating film, reflected at the gate electrode, and absorbed at the organic semiconductor layer. Conductivity of the organic semiconductor layer that has absorbed the ultraviolet light is lower than that of the organic semiconductor layer that has not absorbed the ultraviolet light.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: June 26, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiichiro Yutani, Hidenori Tomono, Takumi Yamaga
  • Publication number: 20120153271
    Abstract: A leaving substituent-containing compound including a partial structure represented by the following General Formula (I): where a pair of X1 and X2 or a pair of Y1 and Y2 each represent a hydrogen atom; the other pair each represent a group selected from the group consisting of a halogen atom and a substituted or unsubstituted acyloxy group having one or more carbon atoms; a pair of the acyloxy groups represented by the pair of X1 and X2 or the pair of Y1 and Y2 may be identical or different, or may be bonded together to form a ring; R1 to R4 each represent a hydrogen atom or a substituent; and Q1 and Q2 each represent a hydrogen atom, a halogen atom or a monovalent organic group, and may be bonded together to form a ring.
    Type: Application
    Filed: September 9, 2010
    Publication date: June 21, 2012
    Inventors: Daisuke Goto, Satoshi Yamamoto, Toshiya Sagisaka, Takuji Kato, Takashi Okada, Masato Shinoda, Shinji Matsumoto, Masataka Mohri, Keiichiro Yutani
  • Patent number: 8183563
    Abstract: A disclosed organic transistor includes a substrate; a gate electrode; a gate insulating film; source-drain electrodes; and an organic semiconductor layer. The gate electrode and the gate insulating film are disposed on the substrate in the stated order, and the source-drain electrodes and the organic semiconductor layer are disposed at least on the gate insulating film in the stated order. At least one of the source-drain electrodes includes a first part disposed directly above the gate electrode, a second part disposed not over the gate electrode, and a connecting part which has a width smaller than a width of the first part and connects the first part and the second part.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: May 22, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiichiro Yutani, Takumi Yamaga, Takanori Tano
  • Publication number: 20110215306
    Abstract: To provide an organic semiconductor element, containing: a source electrode containing a first organic compound layer and a second organic compound layer, at least one of the layers having an organic semiconductor active region; and a drain electrode containing the first organic compound layer and the second organic compound layer, as well as providing an organic electrode, containing: a laminated film, in which a layer of a tetrathiafulvalene derivative expressed by the following general formula I and a layer of an electron accepting compound are laminated:
    Type: Application
    Filed: March 1, 2011
    Publication date: September 8, 2011
    Inventors: Takuji KATO, Satoshi YAMAMOTO, Toshiya SAGISAKA, Takanori TANO, Masato SHINODA, Daisuke GOTO, Shinji MATSUMOTO, Masataka MOHRI, Keiichiro YUTANI, Chihaya ADACHI, Masafumi TORII
  • Publication number: 20100224865
    Abstract: A disclosed organic transistor includes a substrate; a gate electrode; a gate insulating film; source-drain electrodes; and an organic semiconductor layer. The gate electrode and the gate insulating film are disposed on the substrate in the stated order, and the source-drain electrodes and the organic semiconductor layer are disposed at least on the gate insulating film in the stated order. At least one of the source-drain electrodes includes a first part disposed directly above the gate electrode, a second part disposed not over the gate electrode, and a connecting part which has a width smaller than a width of the first part and connects the first part and the second part.
    Type: Application
    Filed: November 13, 2008
    Publication date: September 9, 2010
    Applicant: RICOH COMPANY, LTD.
    Inventors: Keiichiro Yutani, Takumi Yamaca, Takanori Tano
  • Publication number: 20100193775
    Abstract: An organic transistor includes a substrate; a gate electrode and a gate insulating film sequentially formed on the substrate in the stated order; and a source electrode, a drain electrode, and an organic semiconductor layer formed on at least the gate insulating film. Ultraviolet light is radiated to the substrate from a side without the gate electrode, transmitted through the substrate and the gate insulating film, reflected at the gate electrode, and absorbed at the organic semiconductor layer. Conductivity of the organic semiconductor layer that has absorbed the ultraviolet light is lower than that of the organic semiconductor layer that has not absorbed the ultraviolet light.
    Type: Application
    Filed: October 17, 2007
    Publication date: August 5, 2010
    Inventors: Keiichiro Yutani, Hidenori Tomono, Takumi Yamaga
  • Publication number: 20090321727
    Abstract: An organic transistor array includes gate electrodes provided on a substrate, source and drain electrodes provided above or below the gate electrodes via a gate insulator layer, and an organic semiconductor layer opposing the gate electrodes via the gate insulator layer, and forming a channel region between mutually adjacent source and drain electrodes. The organic transistor array in a plan view is sectioned into sections each forming a single pixel, and each section has a closest packed structure.
    Type: Application
    Filed: June 24, 2009
    Publication date: December 31, 2009
    Applicant: RICOH COMPANY, LTD.
    Inventors: Keiichiro YUTANI, Takumi YAMAGA, Atsushi ONODERA
  • Publication number: 20090103036
    Abstract: A disclosed active matrix substrate includes plural pixels arranged in a matrix form. At least one of a source electrode, a gate electrode, and a capacitor electrode of pixel component electrodes of each of the pixels is shared by adjacent pixels.
    Type: Application
    Filed: October 7, 2008
    Publication date: April 23, 2009
    Applicant: RICOH COMPANY, LTD.
    Inventors: Atsushi Onodera, Keiichiro Yutani