Patents by Inventor Katsuhiro Maeda
Katsuhiro Maeda 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: 20230302430Abstract: The present disclosure provides an adsorbent which is produced using a low environmental load material as a raw material and adsorbs selenious acid selectively and efficiently. A selenious acid adsorbent according to the present disclosure includes a cellulose derivative (I) having a repeating unit represented by Formula (I).Type: ApplicationFiled: August 11, 2020Publication date: September 28, 2023Applicants: NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITY, DAICEL CORPORATIONInventors: Hiroshi HASEGAWA, Keisuke NAKAKUBO, Koki YUNOSHITA, Asami MASHIO, Katsuhiro MAEDA, Tsuyoshi TANIGUCHI, Tatsuya NISHIMURA, Yoko MITSUHASHI, Masaru ENDO, Takashi ARAI
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Publication number: 20230278007Abstract: The present disclosure provides a cellulose derivative which has excellent storage stability and can selectively adsorb a valuable metal and a toxic metal. The cellulose derivative of the present disclosure has a repeating unit represented by Formula (I) below. In Formula (I) below. Ras are identical or different and are a hydrogen atom or a group represented by Formula (a) below. In Formula (a) below, ring Z represents a heterocycle containing a nitrogen atom as a heteroatom, and R1 represents a single bond or an alkylene group having from 1 to 10 carbons. Four R2s are identical or different, and each represent an alkyl group having from 1 to 10 carbons. At least one of all the Ras included in the cellulose derivative is a group represented by Formula (a) below.Type: ApplicationFiled: June 3, 2020Publication date: September 7, 2023Applicants: NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITY, DAICEL CORPORATIONInventors: Katsuhiro MAEDA, Tsuyoshi TANIGUCHI, Tatsuya NISHIMURA, Hiroshi HASEGAWA, Futo MORITA, Koki YUNOSHITA, Foni Bushon BISWAS, Asami MASHIO, Masaru ENDO, Takashi ARAI
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Patent number: 10323101Abstract: An object is to provide a method for producing a polysaccharide derivative without using a catalyst, a cocatalyst, or an active compound by esterification, etherification, or the like, from a polysaccharide such as cellulose as a source material, while maintaining a high molecular weight. Another object is to provide a method for producing a cellulose derivative in a separated condition directly from biomass containing lignocellulose. A method for producing a polysaccharide derivative of the present invention is characterized in that a reaction is carried out in a mixture comprising: a source material comprising a polysaccharide; an ionic liquid for which the pKa of a conjugate acid of an anion in DMSO is 12 to 19 and which is capable of producing a carbene; and a chain or cyclic ester compound or an epoxy compound. Preferably as a source material containing a polysaccharide, a biomass source material containing lignocellulose is used.Type: GrantFiled: October 23, 2015Date of Patent: June 18, 2019Assignees: NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITY, KANAZAWA INSTITUTE OF TECHNOLOGYInventors: Ryohei Kakuchi, Kazuaki Ninomiya, Yoshiki Shibata, Kiyoshi Uzawa, Tomoki Ogoshi, Katsuhiro Maeda, Tomoyuki Ikai, Kenji Takahashi
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Publication number: 20180022832Abstract: An object is to provide a method for producing a polysaccharide derivative without using a catalyst, a cocatalyst, or an active compound by esterification, etherification, or the like, from a polysaccharide such as cellulose as a source material, while maintaining a high molecular weight. Another object is to provide a method for producing a cellulose derivative in a separated condition directly from biomass containing lignocellulose. A method for producing a polysaccharide derivative of the present invention is characterized in that a reaction is carried out in a mixture comprising: a source material comprising a polysaccharide; an ionic liquid for which the pKa of a conjugate acid of an anion in DMSO is 12 to 19 and which is capable of producing a carbene; and a chain or cyclic ester compound or an epoxy compound. Preferably as a source material containing a polysaccharide, a biomass source material containing lignocellulose is used.Type: ApplicationFiled: October 23, 2015Publication date: January 25, 2018Applicants: NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITY, Kanazawa Institute of TechnologyInventors: Ryohei KAKUCHI, Kazuaki NINOMIYA, Yoshiki SHIBATA, Kiyoshi UZAWA, Tomoki OGOSHI, Katsuhiro MAEDA, Tomoyuki IKAI, Kenji TAKAHASHI
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Patent number: 9562121Abstract: The present invention provides an optically active poly(diphenylacetylene) compound represented by the following formula (I): [wherein each symbol is as described in the DESCRIPTION], and a production method thereof, an optical isomer separating agent containing the poly(diphenylacetylene) compound, and a packing material for a chiral column, containing the optical isomer separating agent coated on a carrier. According to the present invention, a practical optical isomer separation agent having a high optical resolution ability for a wide variety of racemic compounds and an optical isomer separation method can be provided.Type: GrantFiled: February 10, 2014Date of Patent: February 7, 2017Assignee: NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITYInventors: Katsuhiro Maeda, Shigeyoshi Kanoh, Tomoyuki Ikai, Kouhei Shimomura, Miyuki Maruta
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Patent number: 9290592Abstract: The present invention provides an optical isomer separating agent and a production method thereof. That is, the present invention provides a one-handed helical poly(diphenylacetylene) compound represented by the following formula (I) [wherein each symbol is as described in the DESCRIPTION], and a production method thereof, an optical isomer separating agent containing the poly(diphenylacetylene) compound, and a packing material for a chiral column, containing the optical isomer separating agent coated on a carrier. Since these have a superior separation ability for a wide variety of compounds, a practical optical resolution method can be provided.Type: GrantFiled: August 26, 2013Date of Patent: March 22, 2016Assignee: NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITYInventors: Katsuhiro Maeda, Shigeyoshi Kanoh, Tomoyuki Ikai, Kouhei Shimomura, Yuki Komatsu
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Publication number: 20150376309Abstract: The present invention provides an optical isomer separating agent and a production method thereof. That is, the present invention provides a one-handed helical poly(diphenylacetylene) compound represented by the following formula (I) [wherein each symbol is as described in the DESCRIPTION], and a production method thereof, an optical isomer separating agent containing the poly(diphenylacetylene) compound, and a packing material for a chiral column, containing the optical isomer separating agent coated on a carrier. Since these have a superior separation ability for a wide variety of compounds, a practical optical resolution method can be provided.Type: ApplicationFiled: August 26, 2013Publication date: December 31, 2015Inventors: Katsuhiro MAEDA, Shigeyoshi KANOH, Tomoyuki IKAI, Kouhei SHIMOMURA, Yuki KOMATSU
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Publication number: 20150376308Abstract: The present invention provides an optically active poly(diphenylacetylene) compound represented by the following formula (I): [wherein each symbol is as described in the DESCRIPTION], and a production method thereof, an optical isomer separating agent containing the poly(diphenylacetylene) compound, and a packing material for a chiral column, containing the optical isomer separating agent coated on a carrier. According to the present invention, a practical optical isomer separation agent having a high optical resolution ability for a wide variety of racemic compounds and an optical isomer separation method can be provided.Type: ApplicationFiled: February 10, 2014Publication date: December 31, 2015Inventors: Katsuhiro MAEDA, Shigeyoshi KANOH, Tomoyuki IKAI, Kouhei SHIMOMURA, Miyuki MARUTA
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Patent number: 6959231Abstract: A robot system includes a plurality of segments 3, joints 4 for linking the segments together, drive units 5 for actuating the joints, and a controller 8 for controlling the drive units. Further, the robot system has bladders 2 filled with a fluid being of lower specific gravity than the outside environment. A center of buoyancy differs from a center of gravity, and the robot system has a specific gravity of greater than 1 relative the outside environment.Type: GrantFiled: October 24, 2003Date of Patent: October 25, 2005Assignee: Kabushiki Kaisha ToshibaInventor: Katsuhiro Maeda
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Patent number: 6833430Abstract: A process for the production of polyacetylene derivatives by which polyacetylene derivatives having an ability to discriminate asymmetry can be easily obtained in a few steps and in high yield and which is also advantageous in respects of economical efficiency, environmental problems, and so on. This process is characterized by polymerizing an acetylene derivative having a hydrophilic functional group in an aqueous solvent in the presence of a water-soluble transition metal complex catalyst and a base.Type: GrantFiled: October 9, 2002Date of Patent: December 21, 2004Assignee: Japan Science and Technology AgencyInventors: Eiji Yashima, Katsuhiro Maeda
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Publication number: 20040089090Abstract: A robot system includes a plurality of segments 3, joints 4 for linking the segments together, drive units 5 for actuating the joints, and a controller 8 for controlling the drive units. Further, the robot system has bladders 2 filled with a fluid being of lower specific gravity than the outside environment. A center of buoyancy differs from a center of gravity, and the robot system has a specific gravity of greater than 1 relative the outside environment.Type: ApplicationFiled: October 24, 2003Publication date: May 13, 2004Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Katsuhiro Maeda
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Patent number: 6732015Abstract: A robot system includes a plurality of segments 3, joints 4 for linking the segments together, drive units 5 for actuating the joints, and a controller 8 for controlling the drive units. Further, the robot system has bladders 2 filled with a fluid being of lower specific gravity than the outside environment. A center of buoyancy differs from a center of gravity, and the robot system has a specific gravity of greater than 1 relative to the outside environment.Type: GrantFiled: March 14, 2002Date of Patent: May 4, 2004Assignee: Kabushiki Kaisha ToshibaInventor: Katsuhiro Maeda
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Publication number: 20030176946Abstract: A robot system includes a plurality of segments 3, joints 4 for linking the segments together, drive units 5 for actuating the joints, and a controller 8 for controlling the drive units. Further, the robot system has bladders 2 filled with a fluid being of lower specific gravity than the outside environment. A center of buoyancy differs from a center of gravity, and the robot system has a specific gravity of greater than 1 relative to the outside environment.Type: ApplicationFiled: March 14, 2002Publication date: September 18, 2003Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Katsuhiro Maeda
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Publication number: 20030114618Abstract: A process for the production of polyacetylene derivatives by which polyacetylene derivatives having an ability to discriminate asymmetry can be easily obtained in a few steps and in high yield and which is also advantageous in respects of economical efficiency, environmental problems, and so on. This process is characterized by polymerizing an acetylene derivative having a hydrophilic functional group in an aqueous solvent in the presence of a water-soluble transition metal complex catalyst and a base.Type: ApplicationFiled: October 9, 2002Publication date: June 19, 2003Inventors: Eiji Yashima, Katsuhiro Maeda
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Patent number: 6559258Abstract: A water-soluble polymer which has higher sensitivity and is responsive to the chirality of a wide range of optically active isomers. It is a poly(phosphonoarylacetylene) represented by the following formula (I) or a salt thereof, (Wherein Ar represents an aryl group substituted by a phosphono group; and n is an integer of 5 or larger). Also provided is a chiral sensor or optical resolving reagent each comprising the poly(phosphonoarylacetylene) or its salt.Type: GrantFiled: March 29, 2002Date of Patent: May 6, 2003Assignee: Japan Science and Technology CorporationInventors: Eiji Yashima, Katsuhiro Maeda
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Publication number: 20020156217Abstract: A water-soluble polymer which has higher sensitivity and is responsive to the chirality of a wide range of optically active isomers.Type: ApplicationFiled: March 29, 2002Publication date: October 24, 2002Inventors: Eiji Yashima, Katsuhiro Maeda
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Patent number: 6068177Abstract: A continuous hot rolling method including the steps of: cutting the tail portion of a preceding material in a steel product and the front portion of a succeeding material in the steel product to form butt faces; previously determining the thickness of scale created on the butt faces to determine the proportion of the weight of the scale; calculating the amount of oxygen dissolved in a weld molten zone, determining a deoxidation capacity of a deoxidizer for deoxidizing the above amount of oxygen; allowing the butt faces to abut against each other to form a butt area; applying a laser beam to the butt area to form a weld molten zone; incorporating the deoxidizer having the above deoxidation capacity into the weld molten zone; and hot rolling the molten joined steel product.Type: GrantFiled: October 28, 1997Date of Patent: May 30, 2000Assignee: Nippon Steel CorporationInventors: Shinji Matsuo, Katsuhiro Maeda, Seiji Arizumi, Katsuhiro Minamida, Masahiro Ohara, Takaaki Nakamura, Hiroki Kato, Shigeru Nishibayashi, Masakazu Abe
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Patent number: 5811953Abstract: A motor driving circuit coupled to a motor having a plurality of phases of coils includes a standard power source generating a first power supply voltage, and a step-up power source for generating a second power supply voltage greater than the first power supply voltage. A selecting circuit selects either the first power supply voltage or the second power supply voltage in response to a selecting signal. A motor driving circuit causes currents to flow in the phases of the motor in accordance with motor driving signals respectively related to the phases in a state in which a selected power supply voltage output by the selecting circuit is applied to one or more phases. A switching unit generates the selecting signal on the basis of the motor driving signals and a voltage signal corresponding to a current flowing through at least one of the phases of the motor so that the second power supply voltage is selected first and the first power supply voltage is selected second with respect to each of the phases.Type: GrantFiled: December 20, 1996Date of Patent: September 22, 1998Assignee: Fujitsu LimitedInventors: Sumio Watanabe, Katsuhiro Maeda, Shuko Yamaji
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Patent number: 5319390Abstract: An object of this invention is to present a thermal printer for printing at high speed the data with the drive at a low voltage of around 5 V while preventing the printing problems attributable to the voltage drop due to internal impedance and to the loss inside the head coming from the common conductor inside the head. The thermal printer has a plurality of heating elements.The thermal printer comprises a print head consisting of the print blocks which have divided the heating elements at every stipulated quantity and a heating means for electrically heating the heating elements on the basis of the stipulated data at every print block wherein the heating means has been structured to simultaneously heat the heating elements against a plurality of print blocks to color the thermosensitive paper in contact with the heating elements of the print block.Type: GrantFiled: September 27, 1991Date of Patent: June 7, 1994Assignee: Fujitsu LimitedInventors: Sumio Watanabe, Shuko Yamaji, Katsuhiro Maeda
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Patent number: 5027885Abstract: An injection apparatus for a high-speed type thin plate continuous casting machine comprises linear motors (3A, 3B) interposing long sides of a flat nozzle (3), a power source unit for applying predetermined currents having a predetermined frequency to the linear motors (3A, 3B), and linear motor power factor improving capacitors (21) connected between the linear motors (3A, 3B) and the power source unit. A material on the inner walls of the short sides of the flat nozzle (3) is a conductive material to improve an edge effect, additionally, the apparatus is constructed to use a heating operation of the linear motor in heating the nozzle or a molten metal in the nozzle by adequately controlling a frequency or a current of a power supplied to the linear motors.Type: GrantFiled: January 16, 1990Date of Patent: July 2, 1991Assignee: Nippon-Steel CorporationInventors: Keisuke Fujisake, Hideyuki Misumi, Junichi Nakagawa, Akira Hashimoto, Hidetoshi Yuyama, Noriyuki Kanai, Katsuhiro Maeda, Tsuyoshi Okada, Azumi Inaba, Shigeki Kashio, Atsuhiro Tokuda, Shiro Sukenari, Michiaki Kikunaga