Patents by Inventor Hirotaka Ihara
Hirotaka Ihara 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: 20220266222Abstract: The present invention provides a column filler for liquid chromatography that has a great adsorption capacity, adjustable adsorption selectivity, and high shape retainability and therefore is usable for measurement of various substances and capable of achieving excellent separation performance and a high filling rate in a column when used as a column filler for liquid chromatography. Provided is a column filler for liquid chromatography including carbon-coated porous particles, the carbon-coated porous particles including porous particles each having a coating layer containing an amorphous carbon on a surface.Type: ApplicationFiled: May 13, 2022Publication date: August 25, 2022Applicants: SEKISUI CHEMICAL CO., LTD., NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITYInventors: Ren-de SUN, Shoji NOZATO, Akira NAKASUGA, Hirotaka IHARA, Makoto TAKAFUJI, Yutaka KUWAHARA, Hiroki NOGUCHI, Tianhang LIU
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Publication number: 20210283576Abstract: The present invention provides a column filler for liquid chromatography that has a great adsorption capacity, adjustable adsorption selectivity, and high shape retainability and therefore is usable for measurement of various substances and capable of achieving excellent separation performance and a high filling rate in a column when used as a column filler for liquid chromatography. Provided is a column filler for liquid chromatography including carbon-coated porous particles, the carbon-coated porous particles including porous particles each having a coating layer containing an amorphous carbon on a surface.Type: ApplicationFiled: November 11, 2017Publication date: September 16, 2021Applicants: SEKISUI CHEMICAL CO., LTD., NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITYInventors: Ren-de SUN, Shoji NOZATO, Akira NAKASUGA, Hirotaka IHARA, Makoto TAKAFUJI, Yutaka KUWAHARA, Hiroki NOGUCHI, Tianhang LIU
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Publication number: 20210168972Abstract: A heat conductive sheet having excellent heat conductivity in the thickness direction is provided. A heat conductive sheet (1) comprises a first carbon material having a graphene laminated structure (2), orientation-controlling particles (3), and a first resin (4), wherein at least a part of the first carbon material (2) is oriented in a direction different from the surface direction of the heat conductive sheet (1) due to the presence of the orientation-controlling particles (3), and the ratio of the average particle diameter of the first carbon material (2) to the average particle diameter of the orientation-controlling particles (3) (the first carbon material (2)/the orientation-controlling particles (3)) is 0.09 or more and less than 4.0.Type: ApplicationFiled: December 10, 2018Publication date: June 3, 2021Inventors: Kouji Ashiba, Keigo Oowashi, Shoji Nozato, Makoto Takafuji, Hirotaka Ihara
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Publication number: 20180354798Abstract: The present invention provides black particles having high electrical insulation properties, high blackness in a visible light region, and excellent dispersibility, and a method for producing the black particles. The present invention relates to black particles containing amorphous carbon, the amorphous carbon being derived from carbon contained in an oxazine resin, the black particles having a specific gravity of 1.8 g/cm3 or less, a zeta potential of ?70 to +80 mV, an average total light reflectance measured at a wavelength of 400 to 800 nm of 5% or less, and a peak intensity ratio between G band and D band as determined from a Raman spectrum of 1.2 or more.Type: ApplicationFiled: February 17, 2017Publication date: December 13, 2018Applicants: SEKISUI CHEMICAL CO., LTD., NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITYInventors: Ren-de SUN, Shoji NOZATO, Akira NAKASUGA, Hirotaka IHARA, Makoto TAKAFUJI, Yutaka KUWAHARA, Akiko MURAKAMI
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Patent number: 10131777Abstract: A method produces a composite of a polymer and tungstic acid and/or molybdic acid; and the composite obtained by the method has high transparency and a desired refractive index. This composite contains tungstic acid and/or molybdic acid and a polymer that has a number average molecular weight of 1,000-10,000,000 and an ether bond and/or an ester bond. The content of tungstic acid and/or molybdic acid in the composite is 0.01-95% by weight.Type: GrantFiled: June 17, 2013Date of Patent: November 20, 2018Assignee: National University Corporation Kumamoto UniversityInventors: Hirotaka Ihara, Hirokuni Jintoku
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Publication number: 20170298261Abstract: There is provided a thermally conductive sheet having excellent thermal conductivity in the thickness direction of the sheet. A thermally conductive sheet comprising expanded graphite; and orientation-controlling particles, wherein at least part of the expanded graphite is oriented in a direction different from a plane direction of the sheet by the orientation-controlling particles.Type: ApplicationFiled: November 27, 2015Publication date: October 19, 2017Inventors: Shoji Nozato, Akira Nakasuga, Akihiko Fujiwara, Hirotaka Ihara, Makoto Takafuji, Eisaku Sato
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Patent number: 9604884Abstract: There is provided a composite material having excellent adhesion between a resin and a graphene-like carbon material and a method for producing the same. A composite material comprising a substrate comprising a resin, and a graphene-like carbon material layer provided so as to cover at least part of a surface of the substrate, wherein the graphene-like carbon material layer is composed of a graphene-like carbon material obtained by pyrolyzing a polymer in a composition in which the polymer is fixed to graphite or primary exfoliated graphite.Type: GrantFiled: August 30, 2013Date of Patent: March 28, 2017Assignees: SEKISUI CHEMICAL CO., LTD., NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITYInventors: Shoji Nozato, Akira Nakasuga, Hirotaka Ihara, Makoto Takafuji, Hullathy Subban Ganapathy, Rika Fukuda
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Patent number: 9458295Abstract: A composite material in which a graphene-like carbon material has excellent adhesion to a substrate composed of resin, and a method for producing the same are provided. The composite material comprises a substrate composed of resin and a graphene-like carbon material layer provided so as to cover at least part of the surface of the substrate, wherein graphene-like carbon is closely attached to the surface of the substrate. The method for producing a composite material comprises bringing a graphene-like carbon material into contact with at least part of the surface of a substrate composed of resin and heating under the action of a supercritical or subcritical fluid.Type: GrantFiled: October 7, 2015Date of Patent: October 4, 2016Assignees: SEKISUI CHEMICAL CO., LTD., NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITYInventors: Shoji Nozato, Akira Nakasuga, Hirotaka Ihara, Hullathy Subban Ganapathy, Makoto Takafuji
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Patent number: 9284417Abstract: A composite material in which a graphene-like carbon material has excellent adhesion to a substrate composed of resin, and a method for producing the same are provided. The composite material comprises a substrate composed of resin and a graphene-like carbon material layer provided so as to cover at least part of the surface of the substrate, wherein graphene-like carbon is closely attached to the surface of the substrate. The method for producing a composite material comprises bringing a graphene-like carbon material into contact with at least part of the surface of a substrate composed of resin and heating under the action of a supercritical or subcritical fluid.Type: GrantFiled: May 28, 2012Date of Patent: March 15, 2016Assignees: SEKISUI CHEMICAL CO., LTD., NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITYInventors: Shoji Nozato, Akira Nakasuga, Hirotaka Ihara, Hullathy Subban Ganapathy, Makoto Takafuji
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Publication number: 20160024259Abstract: A composite material in which a graphene-like carbon material has excellent adhesion to a substrate composed of resin, and a method for producing the same are provided. The composite material comprises a substrate composed of resin and a graphene-like carbon material layer provided so as to cover at least part of the surface of the substrate, wherein graphene-like carbon is closely attached to the surface of the substrate. The method for producing a composite material comprises bringing a graphene-like carbon material into contact with at least part of the surface of a substrate composed of resin and heating under the action of a supercritical or subcritical fluid.Type: ApplicationFiled: October 7, 2015Publication date: January 28, 2016Inventors: Shoji Nozato, Akira Nakasuga, Hirotaka Ihara, Hullathy Subban Ganapathy, Makoto Takafuji
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Publication number: 20150210599Abstract: There is provided a composite material having excellent adhesion between a resin and a graphene-like carbon material and a method for producing the same. A composite material comprising a substrate comprising a resin, and a graphene-like carbon material layer provided so as to cover at least part of a surface of the substrate, wherein the graphene-like carbon material layer is composed of a graphene-like carbon material obtained by pyrolyzing a polymer in a composition in which the polymer is fixed to graphite or primary exfoliated graphite.Type: ApplicationFiled: August 30, 2013Publication date: July 30, 2015Inventors: Shoji Nozato, Akira Nakasuga, Hirotaka Ihara, Makoto Takafuji, Hullathy Subban Ganapathy, Rika Fukuda
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Publication number: 20150197628Abstract: Provided are: a method for easily producing a composite of a polymer and tungstic acid and/or molybdic acid; and a composite which is obtained by the method and has high transparency and a desired refractive index. This composite contains tungstic acid and/or molybdic acid and a polymer that has a number average molecular weight of 1,000-10,000,000 and an ether bond and/or an ester bond. The content of tungstic acid and/or molybdic acid in the composite is 0.01-95% by weight.Type: ApplicationFiled: June 17, 2013Publication date: July 16, 2015Inventors: Hirotaka Ihara, Hirokuni Jintoku
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Publication number: 20130244038Abstract: A composite material in which a graphene-like carbon material has excellent adhesion to a substrate composed of resin, and a method for producing the same are provided. The composite material comprises a substrate composed of resin and a graphene-like carbon material layer provided so as to cover at least part of the surface of the substrate, wherein graphene-like carbon is closely attached to the surface of the substrate. The method for producing a composite material comprises bringing a graphene-like carbon material into contact with at least part of the surface of a substrate composed of resin and heating under the action of a supercritical or subcritical fluid.Type: ApplicationFiled: May 28, 2012Publication date: September 19, 2013Inventors: Shoji Nozato, Akira Nakasuga, Hirotaka Ihara, Hullathy Subban Ganapathy, Makoto Takafuji
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Patent number: 5279821Abstract: Here is disclosed a water-insoluble pyrogen adsorbent composed of a polymer possessing amide groups optionally modified, said polymer being, e.g., a poly amino acid, a nylon, on a polyacrylamide.Type: GrantFiled: August 30, 1991Date of Patent: January 18, 1994Assignees: Chuichi Hirayama, Hirotaka Ihara, Ajinomoto Co., Inc.Inventors: Chuichi Hirayama, Hirotaka Ihara, Shunsei Tsunoda, Katsutoshi Aihara, Kazufumi Yagyu, Masao Honma
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Patent number: 5059542Abstract: An artificial carrier particle comprising an anionic polymer and a synthetic polyamino acid having at least one carboxylic group and at least one amino group in its side chain, the complex being insolubilized by an aldehyde crosslinking agent. The artificial carrier particle is useful in immunoassay, in particular, particle immunoassay. The artificial carrier particles are obtained by preparing an aqueous solution containing an anionic polymer and a synthetic polyamino acid comprising at least one free carboxyl group and at least one free amino group in its side chain, adjusting the pH of the solution to 3.5 to 9.5 at room temperature or at progressively increasing temperature under stirring to form solution particles of a desired particle size, and insolubilizing the particles by an aldehyde crosslinking agent.Type: GrantFiled: October 12, 1989Date of Patent: October 22, 1991Assignee: Juridical Foundation The Chemo-Sero-Therapeutic Research InstituteInventors: Takenori Hirai, Hirotaka Ihara, Chuichi Hirayama, Haruo Fuzita, Munehiro Saisho
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Patent number: 4975542Abstract: A method for preparing granular porous chitosan which comprises dispersing an acidic aqueous solution of chitosan in a hydrophobic dispersing medium; and, evaporating water off while stirring the resulting dispersion.Type: GrantFiled: May 19, 1989Date of Patent: December 4, 1990Assignees: Kurita Water Industries Ltd., Chuichi Hirayama, Hirotaka IharaInventors: Chuichi Hirayama, Hirotaka Ihara, Junichi Ida
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Patent number: 4948816Abstract: The present invention provides novel spherical grains of polyamino acid wh can be used as a filler in chromatography, cosmetic powder and the like. The spherical grains can be produced by a method which comprises the steps of preparing a solution of hydrophobic polyamino acid such as poly n-leucine dissolved in an organic solvent; adding the solution to an aqueous medium and agitating said medium so as to obtain a dispersion of the spherical grains of the polyamino acid dispersed in the aqueous medium while evaporating the organic solvent; and taking out the spherical grains of polyamino acid from the dispersion.Type: GrantFiled: June 20, 1989Date of Patent: August 14, 1990Assignees: Chuichi Hirayama, Yoshiaki Motozato, Hirotaka Ihara, Juridical Foundation the Chemo-Sero-Therapeutic Research Institute, Mitsui Toatus Chemical, Inc.Inventors: Chuichi Hirayama, Yoshiaki Motozato, Hirotaka Ihara
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Patent number: 4840975Abstract: The present invention provides novel spherical grains of polyamino acid wh can be used as a filler in chromatography, cosmetic powder and the like. The spherical grains can be produced by a method which comprises the steps of preparing a solution of hydrophobic polyamino acid such as poly n-leucine dissolved in an organic solvent; adding the solution to an aqueous medium and agitating said medium so as to obtain a dispersion of the spherical grains of the polyamino acid dispersed in the aqueous medium while evaporating the organic solvent; and taking out the spherical grains of polyamino acid from the dispersion.Type: GrantFiled: November 3, 1987Date of Patent: June 20, 1989Assignees: Chuichi Hirayama, Yoshiaki Motozato, Hirotaka Ihara, Juridical Foundation The Chemo-Sero-Therapeutic Research Institute, Mitsui Toatus Chemical, Inc.Inventors: Chuichi Hirayama, Yoshiaki Motozato, Hirotaka Ihara