Patents by Inventor Takuji Yoshimoto

Takuji Yoshimoto 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: 20150228982
    Abstract: A hyper-branched polymer dispersant represented by, for example, formula (I) has high adhesion properties to a current collector substrate and therefore enables the formation of an electrically conductive bonding layer having high carbon nanotube concentration. When a composite current collector for an energy storage device electrode which is equipped with the electrically conductive bonding layer is used, it becomes possible to produce an energy storage device from which an electrical current can be extracted without causing the decrease in a voltage particularly in use applications that require a large electrical current instantaneously, such as electrical automotive applications, and which has a long cycle life.
    Type: Application
    Filed: September 6, 2013
    Publication date: August 13, 2015
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuki Shibano, Shigeru Mitsui, Takuji Yoshimoto
  • Patent number: 9082985
    Abstract: Disclosed is an arylsulfonic acid compound characterized by being represented by formula (1). By using this compound as an electron-acceptor material, highly uniform film formability can be achieved. By using a thin film containing the arylsulfonic acid compound in an OLED device or a PLED device, there can be obtained excellent EL device characteristics such as low driving voltage, high luminous efficiency and long life. (In the formula, X represents O, S or NH; Ar represents an aryl group; and n represents the number of sulfonic groups, which is an integer of 1-4.).
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: July 14, 2015
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki Nakaie, Takuji Yoshimoto
  • Patent number: 9049771
    Abstract: Disclosed is a charge-transporting material comprising a heteropoly acid compound such as phosphomolybdic acid as a charge-transporting substance. Also disclosed is a charge-transporting varnish comprising the charge-transporting material and an organic solvent, wherein the charge-transporting substance is dissolved in the organic solvent. It becomes possible to provide a charge-transporting material which comprises a substance having high solubility in an organic solvent, charge-transporting properties, and an ability to oxidize hole transport materials, and a charge-transporting varnish comprising the charge-transporting material.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: June 2, 2015
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takuji Yoshimoto, Tomohisa Yamada
  • Patent number: 8993708
    Abstract: A carbazole polymer including a repeating unit represented by Formula 1 and having excellent one electron oxidation-state stability, wherein, in Formula 1, R1-R4 each independently represents an alkyl group having 1-60 carbon atoms, a haloalkyl group having 1-60 carbon atoms, or similar, Cz represents a divalent group including a carbazole skeleton represented by Formula 2, and Ar represents a divalent aromatic ring or similar; wherein, in Formula 2, R5 represents a hydrogen atom, an alkyl group having 1-60 carbon atoms, or similar, R6-R11 each independently represents a hydrogen atom, a halogen atom, or similar, and m represents an integer 1-10.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: March 31, 2015
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Yuki Shibano, Takuji Yoshimoto
  • Publication number: 20150053892
    Abstract: A charge-transporting thin film having excellent flatness can be obtained with good repeatability using the charge-transporting varnish of the present invention, which contains: a charge transportation substance comprising a charge-transporting monomer or a charge-transporting oligomer or polymer having a number-average molecular weight of 200-50,000, or a charge transporting material comprising the charge transportation substance and a dopant substance; and a mixed solvent including at least one type of good solvent and at least one type of poor solvent; the absolute value of the boiling point difference ?T° C. of the good solvent and the poor solvent satisfying the relation |?T|<20° C.; the viscosity at 25° C. being 7.5 mPa·s or less; the surface tension at 23° C. being 30.0-40.0 mN/m; and the charge-transporting material being dissolved or uniformly dispersed in the mixed solvent.
    Type: Application
    Filed: February 22, 2013
    Publication date: February 26, 2015
    Inventors: Kayo Takeda, Takuji Yoshimoto
  • Publication number: 20150028793
    Abstract: A motor control apparatus includes a secondary-magnetic-flux-command calculating unit including a minimum-current-secondary-magnetic-flux-command calculating unit that calculates a secondary magnetic flux command for minimizing a current root-mean-square value due to a torque current and an excitation current and a PWM-signal generating unit that generates a torque current command for outputting a desired torque command and an excitation current command for outputting the secondary magnetic flux command, performs vector control such that a q-axis current, which is a detection value of the torque current, and a d-axis current, which is a detection value of the excitation current, respectively coincide with the torque current command and the excitation current command, and generates control signals for turning on and off a switching element in an inverter.
    Type: Application
    Filed: January 30, 2013
    Publication date: January 29, 2015
    Inventors: Takuji Yoshimoto, Yoshinori Yamashita
  • Publication number: 20140371421
    Abstract: A carbazole polymer including a repeating unit represented by formula (1) and having excellent one electron oxidation-state stability. {In formula (1) R1-R4 each independently represents an alkyl group having 1-60 carbon atoms, a haloalkyl group having 1-60 carbon atoms, or similar, Cz represents a divalent group including a carbazole skeleton represented by formula (2), and Ar represents a divalent aromatic ring or similar. [In formula (2) R5 represents a hydrogen atom, an alkyl group having 1-60 carbon atoms, or similar, R6-R11 each independently represents a hydrogen atom, a halogen atom, or similar, and m represents an integer 1-10.
    Type: Application
    Filed: January 22, 2013
    Publication date: December 18, 2014
    Applicant: Nissan Chemical Industries, Ltd
    Inventors: Yuki Shibano, Takuji Yoshimoto
  • Patent number: 8906519
    Abstract: An oligoaniline compound represented by the formula (1) can provide a charge transporting thin film which shows a suppressed coloration in the visible range. Use of this thin film makes it possible to ensure a color reproducibility of a device without lowering the color purity of an electroluminescent light or a light having passed through a color filter. wherein R1 to R10 independently represent each a hydrogen atom, a halogen, etc.; m and n independently represent each an integer of 1 or more while satisfying the condition m+n?20; and X is a structure represented by any of the following formulae (4) to (10), etc.; wherein R21 to R36 independently represent each a hydrogen atom, a hydroxyl group, etc.; p and q represent each an integer of 1 or more while satisfying the conditions p?20 and q?20; and W1s independently represent each —(CR1R2)p-, —O—, —S—, etc.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: December 9, 2014
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Taku Kato, Takuji Yoshimoto
  • Patent number: 8575392
    Abstract: A charge-transporting varnish comprising a phenylamino-N,N?-diphenylquinonediimine derivative represented by the formula (1) as a charge-transporting substance. It becomes possible to provide a charge-transporting varnish comprising an oxidized oligoaniline, which has a high solubility in various organic solvents and also has a good filtration property because the varnish has no aggregation property. (wherein R1 represents a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group; and R2 to R19 independently represent a hydrogen atom, a hydroxyl group, an amino group, a silanol group, a thiol group, a carboxyl group, a phosphoric acid group, a phosphate ester group, an ester group, a thioester group, an amide group, a nitro group, a substituted or unsubstituted monovalent hydrocarbon group, an organooxy group, an organoamino group, an organosilyl group, an organothio group, an acyl group, a sulfone group or a halogen atom.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: November 5, 2013
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takuji Yoshimoto, Tomohisa Yamada, Taku Kato
  • Publication number: 20130240795
    Abstract: Disclosed is an arylsulfonic acid compound characterized by being represented by formula (1). By using this compound as an electron-acceptor material, highly uniform film formability can be achieved. By using a thin film containing the arylsulfonic acid compound in an OLED device or a PLED device, there can be obtained excellent EL device characteristics such as low driving voltage, high luminous efficiency and long life. (In the formula, X represents O, S or NH; Ar represents an aryl group; and n represents the number of sulfonic groups, which is an integer of 1-4.
    Type: Application
    Filed: May 10, 2013
    Publication date: September 19, 2013
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki NAKAIE, Takuji YOSHIMOTO
  • Patent number: 8460582
    Abstract: Disclosed is an arylsulfonic acid compound characterized by being represented by formula (1). By using this compound as an electron-acceptor material, highly uniform film formability can be achieved. By using a thin film containing the arylsulfonic acid compound in an OLED device or a PLED device, there can be obtained excellent EL device characteristics such as low driving voltage, high luminous efficiency and long life. (In the formula, X represents O, S or NH; Ar represents an aryl group; and n represents the number of sulfonic groups, which is an integer of 1-4.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: June 11, 2013
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Naoki Nakaie, Takuji Yoshimoto
  • Patent number: 8357770
    Abstract: Disclosed is an oligoaniline compound represented by the formula (1), (2), (3) or (4) below, which exhibits high solubility in a low-polarity solvent. This oligoaniline compound is suitable as a charge-transporting material which enables to realize excellent device characteristics such as low driving voltage when applied to an OLED device. (In the formulae, R1-R20 independently represent a hydrogen atom, a halogen atom, a hydroxy group, an amino group, a silanol group, a thiol group, a carboxyl group, a sulfonic acid group, a phosphate group, a phosphoric acid ester group, an ester group, a thioester group, an amide group, a nitro group, a monovalent hydrocarbon group, an organoxy group, an organoamino group, an organosilyl group, an organothio group, an acyl group or a sulfonic group; m, n, l and k independently represent an integer respectively satisfying 1?m?20, 1?n?20, 1?l?20 and 1?k?20; and X represents a fluorinated aryl group).
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: January 22, 2013
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takuji Yoshimoto, Taku Kato
  • Patent number: 8298444
    Abstract: Any of the oligoaniline compounds with a triphenylamine structure represented by the formula (1) exhibits satisfactory light emitting efficiency and brightness performance when used in either an OLED device or a PLED device and is further satisfactory in the solubility in organic solvents so as to be applicable to various coating methods. (each of R1 and R2 independently is a hydrogen atom, an optionally substituted monovalent hydrocarbon group, t-butoxycarbonyl, etc.; each of R3 to R34 independently is a hydrogen atom, hydroxyl, silanol, thiol, carboxyl, a phosphoric group, a phosphoric ester group, ester, thioester, amido, nitro, an optionally substituted monovalent hydrocarbon group, etc.; and each of m and n is an integer of 1 or greater provided that they satisfy the relationship m+n ?20).
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: October 30, 2012
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Tomohisa Yamada, Takuji Yoshimoto
  • Publication number: 20110220853
    Abstract: Disclosed is a charge-transporting material comprising a heteropoly acid compound such as phosphomolybdic acid as a charge-transporting substance. Also disclosed is a charge-transporting varnish comprising the charge-transporting material and an organic solvent, wherein the charge-transporting substance is dissolved in the organic solvent. It becomes possible to provide a charge-transporting material which comprises a substance having high solubility in an organic solvent, charge-transporting properties, and an ability to oxidize hole transport materials, and a charge-transporting varnish comprising the charge-transporting material.
    Type: Application
    Filed: November 18, 2009
    Publication date: September 15, 2011
    Inventors: Takuji Yoshimoto, Tomohisa Yamada
  • Patent number: 7862747
    Abstract: An excellent EL device having low driving voltage, high luminous efficiency and long life can be obtained by using a charge-transporting thin film composed of a charge-transporting varnish which contains an arylsulfonic acid compound represented by the formula (1) or (2) below as an electron-acceptor material especially in an OLED device or a PLED device.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: January 4, 2011
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takuji Yoshimoto, Go Ono
  • Publication number: 20100320422
    Abstract: Disclosed is an arylsulfonic acid compound characterized by being represented by formula (1). By using this compound as an electron-acceptor material, highly uniform film formability can be achieved. By using a thin film containing the arylsulfonic acid compound in an OLED device or a PLED device, there can be obtained excellent EL device characteristics such as low driving voltage, high luminous efficiency and long life. (In the formula, X represents O, S or NH; Ar represents an aryl group; and n represents the number of sulfonic groups, which is an integer of 1-4.
    Type: Application
    Filed: January 26, 2009
    Publication date: December 23, 2010
    Inventors: Naoki Nakane, Takuji Yoshimoto
  • Publication number: 20100230639
    Abstract: Any of the oligoaniline compounds with a triphenylamine structure represented by the formula (1) exhibits satisfactory light emitting efficiency and brightness performance when used in either an OLED device or a PLED device and is further satisfactory in the solubility in organic solvents so as to be applicable to various coating methods. (each of R1 and R2 independently is a hydrogen atom, an optionally substituted monovalent hydrocarbon group, t-butoxycarbonyl, etc.; each of R3 to R34 independently is a hydrogen atom, hydroxyl, silanol, thiol, carboxyl, a phosphoric group, a phosphoric ester group, ester, thioester, amido, nitro, an optionally substituted monovalent hydrocarbon group, etc.; and each of m and n is an integer of 1 or greater provided that they satisfy the relationship m+n?20).
    Type: Application
    Filed: April 9, 2008
    Publication date: September 16, 2010
    Applicant: Nissan Chemical Industries, Ltd.
    Inventors: Tomohisa Yamada, Takuji Yoshimoto
  • Patent number: 7795452
    Abstract: A charge-transporting organic material containing a compound with a 1,4-dithiin ring, which is represented by the following formula (1), is described. When using a thin film made of such an organic material in a low-molecular-weight organic EL (OLED) element and a polymer organic EL (PLED) element, EL element characteristics such as low drive voltage and high luminous efficiency can be improved. In addition, a charge-transporting varnish containing the compound with a 1,4-dithiin ring represented by the above formula (1) has good processing properties, and a thin film obtained therefrom has high charge-transporting characteristics and thus is effective for application to protective films for capacitor electrodes, antistatic films, solar cells or fuel cells.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: September 14, 2010
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takuji Yoshimoto, Go Ono
  • Patent number: 7771842
    Abstract: By using a charge-transporting thin film which is made of charge-transporting varnish containing, as an electron-acceptor material, a 1,4-benzodioxane sulfonic acid compound represented by the formula (1) below especially in an OLED device or a PLED device, there can be realized excellent EL device characteristics such as low driving voltage, high luminous efficiency and long life.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: August 10, 2010
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takuji Yoshimoto, Tomohisa Yamada
  • Publication number: 20100159279
    Abstract: An oligoaniline compound represented by the formula (1) can provide a charge transporting thin film which shows a suppressed coloration in the visible range. Use of this thin film makes it possible to ensure a color reproducibility of a device without lowering the color purity of an electroluminescent light or a light having passed through a color filter. wherein R1 to R10 independently represent each a hydrogen atom, a halogen, etc.; m and n independently represent each an integer of 1 or more while satisfying the condition m+n?20; and X is a structure represented by any of the following formulae (4) to (10), etc.; wherein R21 to R36 independently represent each a hydrogen atom, a hydroxyl group, etc.; p and q represent each an integer of 1 or more while satisfying the conditions p?20 and q?20; and W1s independently represent each —(CR1R2)p-, —O—, —S—, etc.
    Type: Application
    Filed: September 5, 2007
    Publication date: June 24, 2010
    Inventors: Taku Kato, Takuji Yoshimoto