Patents by Inventor Masahito Nishiura

Masahito Nishiura 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: 20220049237
    Abstract: This invention provides a novel carrier for enzyme immobilization and an immobilized enzyme. The carrier for enzyme immobilization according to an embodiment comprises a porous material and cellulose that has an amino group-containing substituent at an anomeric position and is immobilized on the porous material. The immobilized enzyme contains the carrier for enzyme immobilization and an enzyme immobilization on the cellulose. The carrier for enzyme immobilization is obtained by adding an acid to an aqueous solution in which cellulose having an amino group-containing substituent at an anomeric position is dissolved in an aqueous alkaline solution to deposit the cellulose in the presence of a porous material. The immobilized enzyme is obtained by immobilizing an enzyme on the cellulose.
    Type: Application
    Filed: October 17, 2019
    Publication date: February 17, 2022
    Applicants: TOKYO INSTITUTE OF TECHNOLOGY, DKS Co. Ltd.
    Inventors: Takeshi SERIZAWA, Toshiki SAWADA, Masahito NISHIURA
  • Publication number: 20220041758
    Abstract: Provided is a novel cyclic oligosaccharide derived from cellulose. The cyclic oligosaccharide is a cyclic oligosaccharide of Formula (1) having a ?-1,4 glucosidic bond. In the formula, R represents a hydrogen atom or a substituent thereof, a plurality of the Rs may be identical or different, and n represents an integer of 0 to 3.
    Type: Application
    Filed: October 8, 2019
    Publication date: February 10, 2022
    Applicants: OSAKA UNIVERSITY, DKS CO. LTD.
    Inventors: Toshiyuki KIDA, Masahito NISHIURA
  • Publication number: 20210238641
    Abstract: A method for producing a cellooligosaccharide that enables the formation of a cellooligosaccharide having a high degree of polymerization to be suppressed in enzymatic synthesis of a cellooligosaccharide, the method comprising reacting ?-glucose-1-phosphate and at least one primer selected from the group consisting of glucose, cellobiose, and alkylated glucose with cellodextrin phosphorylase in a mixed solvent containing water and a water-soluble organic solvent.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 5, 2021
    Applicants: DAI-ICHI KOGYO SEIYAKU CO., LTD., TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Takeshi SERIZAWA, Toshiki SAWADA, Masahito NISHIURA
  • Publication number: 20210009778
    Abstract: The present invention provides a recyclable flame-retardant expandable styrene-based resin composition that attains high flame retardancy and high heat stability with a small addition amount of a bromine-containing flame retardant. Specifically, the present invention provides a flame-retardant expandable styrene-based resin composition comprising a styrene-based resin (A), a flame retardant (B), fatty acid zinc (C), a heat stabilizer (D), and a foaming agent (F), wherein the flame retardant (B) comprises tetrabromobisphenol A-bis(2,3-dibromo-2-methylpropyl ether) (B1) and a bromine-containing flame retardant (B2) other than (B1).
    Type: Application
    Filed: July 31, 2018
    Publication date: January 14, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventor: Masahito NISHIURA
  • Patent number: 10633502
    Abstract: Provided is a flame-retardant foamable styrene resin composition having a high flame retardancy and thermal stability, and recyclable, with a small amount of a bromine-containing flame retardant added. A flame-retardant foamable styrene resin composition, containing (A) a styrene resin, (B) a bromine-containing organic compound, (C) zinc oxide, and (D) a foaming agent, in which an amount of (C) the zinc oxide added is less than 2 parts by weight per 100 parts by weight of (A) the styrene resin.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: April 28, 2020
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Masahito Nishiura, Hisanori Semori, Naomi Toyoshima
  • Patent number: 9422410
    Abstract: Provided is a recyclable flame-retardant foamed styrene resin composition having high flame-retardancy and heat stability by adding little bromine-containing flame retardant. A flame-retardant foamed styrene resin composition containing (A) a styrene resin, (B) a mixture of (B1) tetrabromobisphenol A-bis(2,3-dibromo-2-methylpropyl ether) and (B2) another bromine-containing flame retardant, (C) zinc-modified hydrotalcite, (D) zeolite, and (G) a foaming agent, containing 0.005-0.08 parts by weight of (C) the zinc-modified hydrotalcite per 100 parts by weight of (A) the styrene resin.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: August 23, 2016
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Masahito Nishiura, Hideaki Onishi, Hisanori Semori, Naomi Toyoshima
  • Publication number: 20160075843
    Abstract: Provided is a flame-retardant foamable styrene resin composition having a high flame retardancy and thermal stability, and recyclable, with a small amount of a bromine-containing flame retardant added. A flame-retardant foamable styrene resin composition, containing (A) a styrene resin, (B) a bromine-containing organic compound, (C) zinc oxide, and (D) a foaming agent, in which an amount of (C) the zinc oxide added is less than 2 parts by weight per 100 parts by weight of (A) the styrene resin.
    Type: Application
    Filed: April 25, 2014
    Publication date: March 17, 2016
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Masahito NISHIURA, Hisanori SEMORI, Naomi TOYOSHIMA
  • Patent number: 7045242
    Abstract: Polymeric compounds are provided the use of which expedites dissociation of an electrolytic salt. The polymeric compounds have a trivalent boron atom which is a Lewis acid. Transport rates of charge carrier ions can be controlled by trapping counter ions of charge carrier ions in the polymeric chain.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: May 16, 2006
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Masahito Nishiura, Michiyuki Kono, Masayoshi Watanabe
  • Publication number: 20050197485
    Abstract: An object of the present invention is to provide a process which can produce, easily and with good productivity and reproducibility, an ethylene oxide copolymer provided with desired compositional ratios of monomers and a desired molecular weight and further with a desired melting point. As a means of achieving this object, a process according to the present invention for production of an ethylene oxide copolymer is a process comprising a step of polymerizing a monomer mixture including ethylene oxide as a main component, thereby producing the ethylene oxide copolymer, with the process being characterized in that the polymerization step includes at least one step each of the following steps: a step in which only the ethylene oxide is supplied to thus polymerize it; and a step in which the ethylene oxide and another monomer are supplied to thus polymerize them.
    Type: Application
    Filed: February 5, 2005
    Publication date: September 8, 2005
    Inventors: Koichiro Saeki, Kazuo Takei, Toshiaki Kuriyama, Masashi Yukitake, Taketo Toba, Makoto Mizushima, Michiyuki Kono, Manabu Kikuta, Masahito Nishiura
  • Patent number: 6913851
    Abstract: The present invention is aimed to provide polyether polymers capable of improving an ion conductivity around room temperature as well as ion conductible polymer compositions and electrochemical devices using the same. The above objectives are achieved by using polyether polymers characterized by having the structure unit represented by the formula (1) and the structure unit represented by the formula (2) and/or the structure unit represented by the formula (3), and having polymerizable and/or non-polymerizable functional groups at each end of the molecular chains.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: July 5, 2005
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Masahito Nishiura, Michiyuki Kono
  • Patent number: 6864353
    Abstract: The present invention provides a production process, in which, when an ethylene oxide copolymer is obtained, conditions for obtaining this copolymer having a desirable molecular weight with ease and good reproducibility are provided. The production process for an ethylene oxide copolymer, according to the present invention, comprises the step of carrying out polymerization of a monomer mixture under stirring in a solvent, thereby obtaining the ethylene oxide copolymer, wherein the monomer mixture includes ethylene oxide and a substituted oxirane compound of a structural formula (1) as essential raw materials; with the production process being characterized in that the stirring is carried out by a stirring power of not less than 0.6 kW/m3.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: March 8, 2005
    Assignees: Dai-ichi Kogyo Seiyaku Co., Ltd., Nippon Shokubai Co., Ltd.
    Inventors: Michiyuki Kono, Manabu Kikuta, Masahito Nishiura, Fumihide Tamura, Taketo Toba, Shigetaka Takamiya, Koichiro Saeki, Kazuo Takei, Toshiaki Kuriyama, Masashi Yukitake
  • Publication number: 20040202912
    Abstract: Polymeric compounds are provided the use of which expedites dissociation of an electrolytic salt. The polymeric compounds have a trivalent boron atom which is a Lewis acid. Transport rates of charge carrier ions can be controlled by trapping counter ions of charge carrier ions in the polymeric chain.
    Type: Application
    Filed: April 30, 2004
    Publication date: October 14, 2004
    Applicant: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Masahito Nishiura, Michiyuki Kono, Masayoshi Watanabe
  • Patent number: 6765084
    Abstract: The present invention provides a novel production process for an ethylene oxide resin, in which, when the ethylene oxide resin is obtained, it is arranged that the resin should contain no antistatic agent, and further its water content is also easily controlled in not more than a definite amount, and the thermal damage of the above resin is prevented, and besides, the reduction of the cost can also be actualized. The production process for an ethylene oxide resin, according to the present invention, comprises the step of carrying out devolatilization of a solvent from a polymerization reaction liquid containing the solvent, thereby obtaining the ethylene oxide resin; with the production process being characterized by arranging that: after the devolatilization, the resin should have a solvent concentration of 0.01 to 30 weight % and a water content of not more than 200 ppm, and the resin should contain no antistatic agent.
    Type: Grant
    Filed: January 2, 2003
    Date of Patent: July 20, 2004
    Assignees: Dai-ichi Kogyo Seiyakn Co., Ltd., Nippon Shokubai Co., Ltd.
    Inventors: Michiyuki Kono, Manabu Kikuta, Masahito Nishiura, Fumihide Tamura, Shigetaka Takamiya, Taketo Toba
  • Patent number: 6673495
    Abstract: Provided are a polymeric electrolyte or a nonaqueous electrolyte that can improve a transport rate of charge carrier ions by adding a compound having boron atoms in the structure, preferably one or more selected from the group consisting of compounds represented by the following general formulas (1) to (4), and an electric device such as a cell or the like using the same. wherein R11, R12, R13, R14, R15, R16, R21, R22, R23, R24, R25, R26, R27, R28, R31, R32, R33, R34, R35, R36, R37, R38, R39, R310, R41, R42, R43, R44, R45, R46, R47, R48, R49, R410, R411 and R412 each represent a hydrogen atom, a halogen atom or a monovalent group, or represent groups bound to each other to form a ring, and Ra, Rb, Rc and Rd each represent a group having a site capable of being bound to boron atoms which are the same or different.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: January 6, 2004
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Masahito Nishiura, Michiyuki Kono, Masayoshi Watanabe
  • Publication number: 20030158374
    Abstract: The present invention provides a production process, in which, when an ethylene oxide copolymer is obtained, conditions for obtaining this copolymer having a desirable molecular weight with ease and good reproducibility are provided. The production process for an ethylene oxide copolymer, according to the present invention, comprises the step of carrying out polymerization of a monomer mixture under stirring in a solvent, thereby obtaining the ethylene oxide copolymer, wherein the monomer mixture includes ethylene oxide and a substituted oxirane compound of a structural formula (1) as essential raw materials; with the production process being characterized in that the stirring is carried out by a stirring power of not less than 0.6 kW/m3.
    Type: Application
    Filed: January 3, 2003
    Publication date: August 21, 2003
    Applicant: Dai-ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Michiyuki Kono, Manabu Kikuta, Masahito Nishiura, Fumihide Tamura, Taketo Toba, Shigetaka Takamiya, Koichiro Saeki, Kazuo Takei, Toshiaki Kuriyama, Masashi Yukitake
  • Publication number: 20030135022
    Abstract: The present invention provides a novel production process for an ethylene oxide resin, in which, when the ethylene oxide resin is obtained, it is arranged that the resin should contain no antistatic agent, and further its water content is also easily controlled in not more than a definite amount, and the thermal damage of the above resin is prevented, and besides, the reduction of the cost can also be actualized. The production process for an ethylene oxide resin, according to the present invention, comprises the step of carrying out devolatilization of a solvent from a polymerization reaction liquid containing the solvent, thereby obtaining the ethylene oxide resin; with the production process being characterized by arranging that: after the devolatilization, the resin should have a solvent concentration of 0.01 to 30 weight % and a water content of not more than 200 ppm, and the resin should contain no antistatic agent.
    Type: Application
    Filed: January 2, 2003
    Publication date: July 17, 2003
    Applicant: Dai-ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Michiyuki Kono, Manabu Kikuta, Masahito Nishiura, Fumihide Tamura, Shigetaka Takamiya, Taketo Toba
  • Publication number: 20020182469
    Abstract: The present invention is aimed to provide polyether polymers capable of improving an ion conductivity around room temperature as well as ion conductible polymer compositions and electrochemical devices using the same. The above objectives are achieved by using polyether polymers characterized by having the structure unit represented by the formula (1) and the structure unit represented by the formula (2) and/or the structure unit represented by the formula (3), and having polymeric and/or non-polymeric functional groups at each end of the molecular chains.
    Type: Application
    Filed: March 12, 2002
    Publication date: December 5, 2002
    Inventors: Masahito Nishiura, Michiyuki Kono
  • Patent number: RE40302
    Abstract: Provided are a polymeric electrolyte or a nonaqueous electrolyte that can improve a transport rate of charge carrier ions by adding a compound having boron atoms in the structure, preferably one or more selected from the group consisting of compounds represented by the following general formulas (1) to (4), and an electric device such as a cell or the like using the same. wherein R11, R12, R13, R14, R15, R16, R21, R22, R23, R24, R25, R26, R27, R28, R31, R32, R33, R34, R35, R36, R37, R38, R39, R310, R41, R42, R43, R44, R45, R46, R47, R48, R49, R410, R411 and R412 each represent a hydrogen atom, a halogen atom or a monovalent group, or represent groups bound to each other to form a ring, and Ra, Rb, Rc and Rd each represent a group having a site capable of being bound to boron atoms which are the same or different.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: May 6, 2008
    Assignee: Dai-Ichi Kogyo Seiyaku Co. Ltd.
    Inventors: Masahito Nishiura, Michiyuki Kono, Masayoshi Watanabe