Patents by Inventor Akihiko Yoshiwara
Akihiko Yoshiwara 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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Publication number: 20220098354Abstract: Provided is a dispersion liquid that can improve coatability (wettability) with respect to a base material and can form a conductive film having high close adherence with a base material. The dispersion liquid contains a carbon material (A), a condensate (B) of an aromatic sulfonic acid compound, a hydroxyphenol compound, and an aldehyde compound, and a solvent (C).Type: ApplicationFiled: January 21, 2020Publication date: March 31, 2022Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Ryuji OOTA
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Patent number: 11186733Abstract: Provided is a conductor film obtainable using a carbon nanotube dispersion liquid. The carbon nanotube dispersion liquid contains carbon nanotubes (A), a polymeric dispersant (B) including a sulfonic acid group-containing monomeric unit and an ethylenically unsaturated aliphatic carboxylic acid monomeric unit, and a solvent (C). Percentage content of the ethylenically unsaturated aliphatic carboxylic acid monomeric unit in the polymeric dispersant (B) is greater than 20 mol % and no greater than 90 mol %.Type: GrantFiled: November 12, 2020Date of Patent: November 30, 2021Assignee: ZEON CORPORATIONInventors: Akihiko Yoshiwara, Kiyoshige Kojima, Yasuo Mukunoki, Akihiro Kojima, Masashi Ikegami
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Publication number: 20210062014Abstract: Provided is a conductor film obtainable using a carbon nanotube dispersion liquid. The carbon nanotube dispersion liquid contains carbon nanotubes (A), a polymeric dispersant (B) including a sulfonic acid group-containing monomeric unit and an ethylenically unsaturated aliphatic carboxylic acid monomeric unit, and a solvent (C). Percentage content of the ethylenically unsaturated aliphatic carboxylic acid monomeric unit in the polymeric dispersant (B) is greater than 20 mol % and no greater than 90 mol %.Type: ApplicationFiled: November 12, 2020Publication date: March 4, 2021Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Kiyoshige KOJIMA, Yasuo MUKUNOKI, Akihiro KOJIMA, Masashi IKEGAMI
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Patent number: 10870766Abstract: Provided is a carbon nanotube dispersion liquid that has excellent stability and that can be used to form a conductor film that exhibits excellent adhesiveness to a substrate. The carbon nanotube dispersion liquid contains carbon nanotubes (A), a polymeric dispersant (B) including a sulfonic acid group-containing monomeric unit and an ethylenically unsaturated aliphatic carboxylic acid monomeric unit, and a solvent (C). Percentage content of the ethylenically unsaturated aliphatic carboxylic acid monomeric unit in the polymeric dispersant (B) is greater than 20 mol % and no greater than 90 mol %.Type: GrantFiled: January 29, 2015Date of Patent: December 22, 2020Assignee: ZEON CORPORATIONInventors: Akihiko Yoshiwara, Kiyoshige Kojima, Yasuo Mukunoki, Akihiro Kojima, Masashi Ikegami
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Publication number: 20200274172Abstract: Provided is a method of producing a conductive film. The method comprises a step of performing gas phase treatment by ozone of carbon nanotubes having an average diameter Av of at least 0.5 nm and no greater than 15 nm, and the average diameter Av and a diameter standard deviation ? satisfying a relationship 0.60>(3?/Av)>0.20 to obtain surface treated carbon nanotubes, and a step of mixing the surface treated carbon nanotubes and Ketjen black to obtain a conductive film having a content ratio by mass of the surface treated carbon nanotubes to the Ketjen black of 5/5 to 9/1.Type: ApplicationFiled: May 11, 2020Publication date: August 27, 2020Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Kiyoshige KOJIMA
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Publication number: 20190270919Abstract: The disclosure relates to a photocurable sealant composition comprising (A) a liquid rubber, (B) a (meth)acryloyl group-containing compound, (C) an aromatic sensitization aid capable of absorbing light having a wavelength of 300 nm or higher, and (D) a photopolymerization initiator. The disclosure also relates to an article selected from the group consisting of a solar cell, a display, an electronic component, a coating material and an adhesive, comprising a cured product of the photocurable sealant composition. The disclosure further relates to an organic solar cell wherein a light blocking member is disposed on a first surface of a first electrode substrate, and a sealant is positioned at least at a light blocking part on a side opposite to the light incident surface side, of the light blocking member.Type: ApplicationFiled: March 21, 2017Publication date: September 5, 2019Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Kiyoshige KOJIMA, Takatoshi MATSUO
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Publication number: 20190112469Abstract: The disclosure relates to a sealant composition for an organic solar cell, comprising (A) a hydrogenated epoxy resin, (B) a photobase generator, and (C) an anionically curable compound other than the component (A). The disclosure also relates to a sealant for an organic solar cell, which is a cured product of the sealant composition. The disclosure further relates to an electrode for an organic solar cell, comprising a substrate, a current collecting wire on the substrate, and a sealant covering the current collecting wire, wherein the current collecting wire is a photocured product, and the sealant is a photocured product of the sealant composition. The disclosure further relates to an organic solar cell prepared by using the sealant composition.Type: ApplicationFiled: March 21, 2017Publication date: April 18, 2019Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Yuki HAYASHI
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Patent number: 10243509Abstract: Provided is a photoelectric conversion module group that enables a balance of high levels of mechanical strength improvement and weight reduction when thin photoelectric conversion modules are used. The photoelectric conversion module includes: a plurality of photoelectric conversion modules (11); a flexible linking portion (12) that mechanically and electrically connects two adjacent photoelectric conversion modules (11) among the plurality of photoelectric conversion modules (11); a flexible protective member (14) that covers at least one of a front surface and a rear surface of the linking portion (12); and one or more rigid reinforcing members (13) that partially cover the photoelectric conversion modules (11). In a case in which a reinforcing member (13) is present at a rear surface of any of the photoelectric conversion modules (11), the rear surface includes an exposed surface region that is not covered by the reinforcing member (13).Type: GrantFiled: March 17, 2016Date of Patent: March 26, 2019Assignee: ZEON CORPORATIONInventors: Masayoshi Yoshida, Kiyoshige Kojima, Yuki Hayashi, Midori Yamaai, Akihiko Yoshiwara
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Publication number: 20190066933Abstract: A method for producing a transparent conductive film is provided. The method includes the steps of: applying a treatment solution prepared by dissolving a metal alkoxide of tin or niobium in an organic solvent on one surface of a carbon nanotube-containing layer (1) containing carbon nanotubes having an average diameter Av and a diameter standard deviation ? that satisfy a relationship 0.60>3?/Av>0.20 to form an oxide layer (2) of tin or niobium on the one surface of the carbon nanotube-containing layer (1).Type: ApplicationFiled: October 30, 2018Publication date: February 28, 2019Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Kiyoshige KOJIMA, Akihiro KOJIMA, Masashi IKEGAMI
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Patent number: 10181602Abstract: Provided is a redox catalyst wherein a catalytically active component is supported on carbon nanotubes whose average diameter (Av) and standard deviation (?) of diameters satisfy the condition 0.60>3?/Av>0.20, and at least a part of a surface of the carbon nanotubes, including a part on which the catalytically active component is supported, is covered with porous inorganic material.Type: GrantFiled: May 27, 2015Date of Patent: January 15, 2019Assignees: ZEON CORPORATION, KYUSHU UNIVERSITYInventors: Masahiro Kishida, Sakae Takenaka, Akihiko Yoshiwara, Kiyoshige Kojima
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Publication number: 20180241342Abstract: Provided is a photoelectric conversion device that facilitates the addition of solar cell module groups and enables improvement of convenience. The photoelectric conversion device includes an interface (21) and is configured to receive an electrical power supply from at least one solar cell module group (10) attached to the interface (21). The interface (21) includes a plurality of rigid members (211), each including a second connection unit (215) that is mechanically and electrically linkable to a first connection unit (123) of the solar cell module group (10), and one or more linking portions (216) that mechanically and electrically link the rigid members (211) in a foldable manner.Type: ApplicationFiled: March 14, 2016Publication date: August 23, 2018Applicant: ZEON CORPORATIONInventors: Masayoshi YOSHIDA, Kiyoshige KOJIMA, Yuki HAYASHI, Midori YAMAAI, Akihiko YOSHIWARA
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Publication number: 20180097469Abstract: Provided is a photoelectric conversion device that enables simple and more reliable connection of a solar cell module to a main body capable of supplying electrical power to an external device. The photoelectric conversion device includes: a photoelectric conversion module group including a first connection means; and a main body part including a second connection means that is mechanically and electrically connectable to the first connection means. The first connection means includes a first connecting portion and a first connector. The second connection means includes a second connecting portion that slides against and engages with the first connecting portion and a second connector that connects to the first connector when the first connecting portion is at a specific position. One of the first connecting portion and the second connecting portion is a guide rail and the other is a guide that slides against and engages with the guide rail.Type: ApplicationFiled: March 14, 2016Publication date: April 5, 2018Applicant: ZEON CORPORATIONInventors: Masayoshi YOSHIDA, Kiyoshige KOJIMA, Yuki HAYASHI, Midori YAMAAI, Akihiko YOSHIWARA
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Publication number: 20180076759Abstract: Provided is a photoelectric conversion module group that enables a balance of high levels of mechanical strength improvement and weight reduction when thin photoelectric conversion modules are used. The photoelectric conversion module includes: a plurality of photoelectric conversion modules (11); a flexible linking portion (12) that mechanically and electrically connects two adjacent photoelectric conversion modules (11) among the plurality of photoelectric conversion modules (11); a flexible protective member (14) that covers at least one of a front surface and a rear surface of the linking portion (12); and one or more rigid reinforcing members (13) that partially cover the photoelectric conversion modules (11). In a case in which a reinforcing member (13) is present at a rear surface of any of the photoelectric conversion modules (11), the rear surface includes an exposed surface region that is not covered by the reinforcing member (13).Type: ApplicationFiled: March 17, 2016Publication date: March 15, 2018Applicant: ZEON CORPORATIONInventors: Masayoshi YOSHIDA, Kiyoshige KOJIMA, Yuki HAYASHI, Midori YAMAAI, Akihiko YOSHIWARA
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Publication number: 20170338051Abstract: An oxide layer (2) of tin or niobium is formed on one surface of a carbon nanotube-containing layer (1) containing carbon nanotubes having an average diameter (Av) and a diameter standard deviation (?) that satisfy a relationship 0.60>3?/Av>0.20.Type: ApplicationFiled: January 19, 2015Publication date: November 23, 2017Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Kiyoshige KOJIMA, Akihiro KOJIMA, Masashi IKEGAMI
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Publication number: 20170140878Abstract: Provided is a counter electrode for dye-sensitized solar cell which is superior in catalytic activity and is also suitable for mass production, a dye-sensitized solar cell including the counter electrode, and a solar cell module obtained using the dye-sensitized solar cell. The counter electrode includes a support and a catalyst layer formed on or over the support, the catalyst layer containing specific carbon nanotubes. The dye-sensitized solar cell includes the counter electrode, and the solar cell module includes the dye-sensitized solar cell.Type: ApplicationFiled: June 11, 2015Publication date: May 18, 2017Applicant: ZEON CORPORATIONInventor: Akihiko YOSHIWARA
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Patent number: 9650462Abstract: There is provided a polymerizable composition which contains a cycloolefin monomer; a metathesis polymerization catalyst; a cross-linking agent; and a compound (A) which has a carbon-carbon unsaturated bond and an active hydrogen reactable group or a combination of a compound (B1) which has an active hydrogen reactable group and a compound (B2) which has a carbon-carbon unsaturated bond.Type: GrantFiled: June 15, 2010Date of Patent: May 16, 2017Assignee: ZEON CORPORATIONInventor: Akihiko Yoshiwara
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Publication number: 20170117555Abstract: Provided is a redox catalyst wherein a catalytically active component is supported on carbon nanotubes whose average diameter (Av) and standard deviation (?) of diameters satisfy the condition 0.60>3?/Av>0.20, and at least a part of a surface of the carbon nanotubes, including a part on which the catalytically active component is supported, is covered with porous inorganic material.Type: ApplicationFiled: May 27, 2015Publication date: April 27, 2017Applicants: ZEON CORPORATION, KYUSHU UNIVERSITYInventors: Masahiro KISHIDA, Sakae TAKENAKA, Akihiko YOSHIWARA, Kiyoshige KOJIMA
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Publication number: 20160340521Abstract: Provided is a carbon nanotube dispersion liquid that has excellent stability and that can be used to form a conductor film that exhibits excellent adhesiveness to a substrate. The carbon nanotube dispersion liquid contains carbon nanotubes (A), a polymeric dispersant (B) including a sulfonic acid group-containing monomeric unit and an ethylenically unsaturated aliphatic carboxylic acid monomeric unit, and a solvent (C). Percentage content of the ethylenically unsaturated aliphatic carboxylic acid monomeric unit in the polymeric dispersant (B) is greater than 20 mol % and no greater than 90 mol %.Type: ApplicationFiled: January 29, 2015Publication date: November 24, 2016Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Kiyoshige KOJIMA, Yasuo MUKUNOKI, Akihiro KOJIMA, Masashi IKEGAMI
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Publication number: 20160329160Abstract: An oxide layer (2) of tin or niobium is formed on one surface of a carbon nanotube-containing layer (1) containing carbon nanotubes having an average diameter (Av) and a diameter standard deviation (?) that satisfy a relationship 0.60>3?/Av>0.20.Type: ApplicationFiled: January 19, 2015Publication date: November 10, 2016Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Kiyoshige KOJIMA, Akihiro KOJIMA, Masashi IKEGAMI
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Publication number: 20160315331Abstract: Provided is a conductive film having excellent conductivity and gas diffusivity that is useful, for example, as a material forming a gas diffusion layer or a catalyst layer of an electrode in a fuel cell. The conductive film includes carbon nanotubes having an average diameter (Av) and a diameter standard deviation (?) satisfying a relationship 0.60>(3?/Av)>0.20 and a conductive carbon that is different from the carbon nanotubes. A content ratio of the carbon nanotubes relative to the conductive carbon (carbon nanotubes/conductive carbon) is from 1/99 to 99/1 as a mass ratio.Type: ApplicationFiled: December 22, 2014Publication date: October 27, 2016Applicant: ZEON CORPORATIONInventors: Akihiko YOSHIWARA, Kiyoshige KOJIMA