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).
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Patent number: 10233337Abstract: 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: GrantFiled: February 22, 2013Date of Patent: March 19, 2019Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Kayo Takeda, Takuji Yoshimoto
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Publication number: 20190062572Abstract: A charge transport varnish containing a charge transport substance, an electron-accepting dopant substance, and an organic solvent, wherein the electron-accepting dopant substance contains one or more types selected from naphthalene disulfonic acid, naphthalene trisulfonic acid, and naphthalene tetrasulfonic acid. This charge transport varnish is suitable for forming a hole collection layer that can be used to produce an organic photoelectric conversion element which exhibits high photoelectric conversion efficiency.Type: ApplicationFiled: January 25, 2017Publication date: February 28, 2019Applicant: NISSAN CHEMICAL CORPORATIONInventors: Juro OSHIMA, Takuji YOSHIMOTO
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Publication number: 20190044132Abstract: Provided is an electrode for energy storage devices, which is provided with a collector substrate, an undercoat layer that is formed on at least one surface of the collector substrate and contains carbon nanotubes, and an active material layer that is formed on the surface of the undercoat layer, and wherein the active material layer does not contain a conductive assistant.Type: ApplicationFiled: December 21, 2016Publication date: February 7, 2019Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Yuki SHIBANO, Tatsuya HATANAKA, Takuji YOSHIMOTO
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Patent number: 10193160Abstract: 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: GrantFiled: September 6, 2013Date of Patent: January 29, 2019Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Yuki Shibano, Shigeru Mitsui, Takuji Yoshimoto
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Publication number: 20190020038Abstract: Provided is an electrode for energy storage devices, which is provided with: a collector substrate; an undercoat layer that is formed on at least one surface of the collector substrate and contains carbon nanotubes; and an active material layer that is formed on the surface of the undercoat layer and contains an active material which contains a titanium-containing oxide.Type: ApplicationFiled: December 21, 2016Publication date: January 17, 2019Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Yuki SHIBANO, Tatsuya HATANAKA, Takuji YOSHIMOTO
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Patent number: 10164258Abstract: A fused-ring quinone-substituted polynorbornene has recurring units of formula (1) and/or (2) below. In formulas (1) and (2), A1 is independently a substituent of formula (3) or (4) below, n is an integer from 1 to 6, and A2 is a substituent of formula (5) or (6) below. In formulas (3) to (6), each X is independently a single bond or a divalent group, and Ar1 and Ar2 are each independently an aromatic hydrocarbon ring or an oxygen atom or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton. This polymer has charge-storing properties and, when used as an electrode active material, is capable of providing a high-performance battery possessing high capacity, high rate characteristics and high cycle characteristics.Type: GrantFiled: March 9, 2016Date of Patent: December 25, 2018Assignees: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Takuma Kawai, Satoshi Nakao, Takuji Yoshimoto
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Publication number: 20180337420Abstract: A nonaqueous secondary cell provided with: a positive electrode provided with a positive-electrode current-collecting substrate and a positive-electrode active material layer formed thereon, the positive-electrode active material layer being able to absorb or discharge lithium; a negative electrode provided with a negative-electrode current-collecting substrate and a negative-electrode active material layer formed thereon, the negative-electrode active material layer being able to absorb or discharge lithium; a separator interposed between the positive and negative electrodes; and a nonaqueous electrolyte solution. The nonaqueous electrolyte solution contains a sulfonyl imide electrolyte and a nonaqueous organic solvent. An electroconductive protective layer obtained by dispersing an electroconductive carbon material in a binder resin is formed on one or both surfaces of the positive-electrode current-collecting substrate and/or the negative-electrode current-collecting substrate.Type: ApplicationFiled: November 25, 2016Publication date: November 22, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tatsuya HATANAKA, Yuki SHIBANO, Takuji YOSHIMOTO
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Publication number: 20180315927Abstract: Provided is a composition for a hole trapping layer of an organic photoelectric conversion element, such composition: containing a solvent and a charge-transporting substance comprising a polyaniline derivative represented by formula (1); and providing a thin film that is suitable as a hole trapping layer of an organic photoelectric conversion element and can also be used to produce an inverse lamination type organic photoelectric conversion element.Type: ApplicationFiled: October 21, 2016Publication date: November 1, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Takuji YOSHIMOTO, Juro OSHIMA, Shun SUGAWARA
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Publication number: 20180269488Abstract: This undercoat foil for an energy storage device electrode comprises a collector base plate, and an undercoat layer formed on at least one surface of the collector base plate, the undercoat layer containing carbon nanotubes, and the coating amount per collector base plate surface being 0.1 g/m2 or less. Since this undercoat foil can be effectively welded by ultrasound, the use thereof allows a low-resistance energy storage device and a simple and effective production method therefor to be provided.Type: ApplicationFiled: May 26, 2016Publication date: September 20, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Yuki SHIBANO, Tatsuya HATANAKA, Takuji YOSHIMOTO
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Patent number: 10020449Abstract: Provided is a composition comprising: a charge-transporting substance that comprises N,N?-diphenylbenzidine; an electron-accepting dopant substance; and an organic solvent. This composition is suitable, for example, as a composition for the anode buffer layer of an organic thin film solar cell, said composition being used to produce a thin film that is suitable for use as an anode buffer layer that makes it possible to achieve an organic thin film solar cell having a high photoelectric conversion efficiency.Type: GrantFiled: December 5, 2014Date of Patent: July 10, 2018Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Juro Oshima, Takuji Yoshimoto
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Publication number: 20180114915Abstract: A photosensor element that is capable of achieving a good balance between high photoelectric conversion efficiency and low dark current is able to be obtained by using a composition for forming a hole collecting layer of a photosensor element, which contains an organic solvent and a charge-transporting material that is composed, for example, of an aniline derivative or thiophene derivative represented by one of formulae (AA)-(DD) and having a molecular weight of 200-2,000.Type: ApplicationFiled: March 16, 2016Publication date: April 26, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Juro OSHIMA, Takuji YOSHIMOTO
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Patent number: 9871253Abstract: A ion-conductive fused-ring quinone polymer includes recurring units of formula (1) and/or (2) below wherein each X is independently a single bond or a divalent group, and A1 and A2 are each independently an aromatic hydrocarbon ring or an oxygen atom or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton. This polymer is a material having charge-storing properties which, when used as an electrode active material, is capable of providing a high-performance battery possessing high capacity, high rate characteristics and high cycle characteristics.Type: GrantFiled: March 9, 2016Date of Patent: January 16, 2018Assignees: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Takuma Kawai, Takuji Yoshimoto
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Patent number: 9667187Abstract: 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: GrantFiled: January 30, 2013Date of Patent: May 30, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takuji Yoshimoto, Yoshinori Yamashita
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Publication number: 20170104214Abstract: A fused-ring quinone-substituted polynorbornene has recurring units of formula (1) and/or (2) below. In formulas (1) and (2), A1 is independently a substituent of formula (3) or (4) below, n is an integer from 1 to 6, and A2 is a substituent of formula (5) or (6) below. In formulas (3) to (6), each X is independently a single bond or a divalent group, and Ar1 and Ar2 are each independently an aromatic hydrocarbon ring or an oxygen atom or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton. This polymer has charge-storing properties and, when used as an electrode active material, is capable of providing a high-performance battery possessing high capacity, high rate characteristics and high cycle characteristics.Type: ApplicationFiled: March 9, 2016Publication date: April 13, 2017Applicants: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Hiroyuki NISHIDE, Kenichi OYAIZU, Takuma KAWAI, Satoshi NAKAO, Takuji YOSHIMOTO
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Publication number: 20170077517Abstract: A ion-conductive fused-ring quinone polymer includes recurring units of formula (1) and/or (2) below wherein each X is independently a single bond or a divalent group, and A1 and A2 are each independently an aromatic hydrocarbon ring or an oxygen atom or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton. This polymer is a material having charge-storing properties which, when used as an electrode active material, is capable of providing a high-performance battery possessing high capacity, high rate characteristics and high cycle characteristics.Type: ApplicationFiled: March 9, 2016Publication date: March 16, 2017Applicants: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Hiroyuki NISHIDE, Kenichi OYAIZU, Takuma KAWAI, Takuji YOSHIMOTO
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Publication number: 20170077518Abstract: Materials having charge-storing properties and made variously of dipyridine-fused benzoquinones of formula (1) below or derivatives thereof, dipyridine-fused benzoquinones of formula (4) below or derivatives thereof, or dipyridine-fused benzoquinone skeleton-containing polymers are provided. In the formulas, Ar1 and Ar2 are each independently a pyridine ring that forms together with two carbon atoms on a benzoquinone skeleton, or a derivative thereof. When used as electrode active materials, these charge storage materials are capable of providing high-performance batteries possessing a high capacity, high rate characteristics and high cycle characteristics.Type: ApplicationFiled: March 9, 2016Publication date: March 16, 2017Applicants: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Hiroyuki NISHIDE, Kenichi OYAIZU, Yuya KAMBE, Takuji YOSHIMOTO
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Publication number: 20160315266Abstract: Provided is a composition comprising: a charge-transporting substance that comprises N,N?-diphenylbenzidine; an electron-accepting dopant substance; and an organic solvent. This composition is suitable, for example, as a composition for the anode buffer layer of an organic thin film solar cell, said composition being used to produce a thin film that is suitable for use as an anode buffer layer that makes it possible to achieve an organic thin film solar cell having a high photoelectric conversion efficiency.Type: ApplicationFiled: December 5, 2014Publication date: October 27, 2016Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Juro OSHIMA, Takuji YOSHIMOTO
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Publication number: 20160200850Abstract: Provided is an agent for dispersing an electrically conductive carbon material, in which the agent consists of a polymer which has an oxazoline group in a side chain and which is obtained by using an oxazoline group-containing monomer such as that represented by formula (1) for example, and in which the agent exhibits excellent dispersion of an electrically conductive carbon material and produces a thin film that exhibits excellent adhesion to a current collection substrate when formed into a thin film together with the electrically conductive carbon material. (In the formula, X denotes a polymerizable carbon-carbon double bond-containing group, and R1-R4 each independently denote a hydrogen atom, a halogen atom, an alkyl group optionally having a branched structure having 1-5 carbon atoms, an aryl group having 6-20 carbon atoms, or an aralkyl group having 7-20 carbon atoms.Type: ApplicationFiled: August 25, 2014Publication date: July 14, 2016Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tatsuya HATANAKA, Yuki SHIBANO, Takuji YOSHIMOTO
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Patent number: 9251923Abstract: A varnish comprising a ground substance consisting of a polymer or oligomer of 200 to 50?104 molecular weight or organic compound of 200 to 1000 molecular weight and a solvent containing a good solvent and a poor solvent whose boiling point (under 760 mmHg) is at least 20° C. lower than that of the good solvent, wherein the ground substance is dissolved in the solvent. Any thin film prepared from this varnish is substantially from generation of foreign matter, so that it can appropriately be used as thin films for electronic devices and those for use in other technical fields.Type: GrantFiled: April 28, 2005Date of Patent: February 2, 2016Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Taku Kato, Takuji Yoshimoto, Go Ono
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Patent number: 9172043Abstract: Disclosed is a charge-transporting varnish containing a charge-transporting organic material, a good solvent, at least one poor solvent with high leveling properties, and at least one volatile poor solvent. The charge-transporting organic material is composed of a charge-transporting material consisting of a charge-transporting monomer or a charge-transporting oligomer having a number average molecular weight of 200 to 5000, or alternatively composed of such a charge-transporting material and an electron-accepting dopant material or a hole-accepting dopant material. This charge-transporting varnish enables to form a uniform and smooth charge-transporting thin film by a spray method or an ink jet method on an exposed electrode portion such as ITO or IZO of a substrate on which a structure of a simple or complicated pattern is formed beforehand.Type: GrantFiled: October 25, 2006Date of Patent: October 27, 2015Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Taku Kato, Takuji Yoshimoto, Go Ono