Patents by Inventor Yusuke IZAWA
Yusuke IZAWA 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).
-
Patent number: 11935801Abstract: An electronic component built-in wiring board includes a substrate having a cavity, an electronic component accommodated in the cavity of the substrate and having pads on a surface of the component, a coating insulating layer formed on the substrate such that the insulating layer is covering the component and has via holes, via conductors formed in the via holes such that the via conductors are penetrating through the insulating layer, and a resin coating formed between the component and the insulating layer and having through holes such that the through holes are partially exposing the pads in the via holes and that the coating has adhesion to the component that is stronger than adhesion of the insulating layer to the component. The via conductors are formed in the via holes and the through holes such that the via conductors are connected to the pads on the surface of the component.Type: GrantFiled: April 27, 2022Date of Patent: March 19, 2024Assignee: IBIDEN CO., LTD.Inventors: Yusuke Tanaka, Tomohiro Futatsugi, Yuichi Nakamura, Yoshiki Matsui, Keinosuke Ino, Tomohiro Fuwa, Seiji Izawa
-
Publication number: 20220081506Abstract: Provided is a polyether polycarbonate diol, wherein the ratio of the total number of terminal alkoxy groups and terminal aryloxy groups to the total number of all terminal groups is 0.20% or more and 7.5% or less. Controlling the ratio of the total number of terminal alkoxy groups and terminal aryloxy groups to the total number of all terminal groups included in the polyether polycarbonate diol to fall within the preferable range enables a polyurethane having an intended molecular weight to be produced while the occurrence of rapid polymerization reaction is reduced.Type: ApplicationFiled: November 22, 2021Publication date: March 17, 2022Applicant: Mitsubishi Chemical CorporationInventors: Yusuke IZAWA, Ryo YAMASHITA, Mitsuharu KOBAYASHI, Kazunao KUSANO, Shohei TANIGUCHI
-
Publication number: 20220056208Abstract: A polyalkylene ether glycol composition containing a nitrogen-containing compound, wherein the nitrogen-containing compound constitutes 0.2 to 40 mass ppm of the polyalkylene ether glycol in terms of nitrogen atoms. A method for producing the polyalkylene ether glycol composition through a purification step of decreasing the amount of acetal in the polyalkylene ether glycol composition.Type: ApplicationFiled: November 2, 2021Publication date: February 24, 2022Applicant: Mitsubishi Chemical CorporationInventors: Ryo YAMASHITA, Yusuke IZAWA, Masaru UTSUNOMIYA
-
Patent number: 10844030Abstract: The present invention relates to a method for producing furfural, including: obtaining a sugar solution containing at least one of a monosaccharide having 5 carbon atoms and a polysaccharide containing the monosaccharide having 5 carbon atoms by carrying out a reaction with a specific resource as a raw material in the presence of a catalyst in a solvent; converting at least one of the monosaccharide and the polysaccharide containing the monosaccharide in the sugar solution into furfural by a dehydration reaction, so as to obtain a reaction solution; and separating the reaction solution into an organic layer and an aqueous layer, wherein an aromatic hydrocarbon solvent having a density of from 0.90 g/cm3 to 1.1 g/cm3 at 25° C. and under atmospheric pressure is used, and wherein the reaction solution is separated at a temperature higher than 90° C. and lower than 150° C.Type: GrantFiled: September 24, 2018Date of Patent: November 24, 2020Assignee: Mitsubishi Chemical CorporationInventors: Yusuke Izawa, Yosuke Suzuki, Masaru Utsunomiya
-
Patent number: 10487032Abstract: An object of the present invention is to provide high-quality 1,4BG capable of working out to a raw material of PBT with good color tone, by efficiently removing and refining impurities mixed when producing a biomass-derived 1,4BG on an industrial scale and the present invention relates to a production method of refined 1,4BG, where a crude 1,4BG-containing solution is obtained from refined raw material 1,4BG obtained by removing bacterial cells, salt contents and water from the fermentation culture medium, through a step of removing high-boiling-point components and/or low-boiling-point components by distillation and/or a step of converting an unsaturated compound to a hydride and the target product is obtained as a side stream in a further distillation step.Type: GrantFiled: December 4, 2014Date of Patent: November 26, 2019Assignees: MITSUBISHI CHEMICAL CORPORATION, GENOMATICA, INC.Inventors: Masaru Utsunomiya, Yusuke Izawa, Norikazu Konishi, Kota Tanaka, Shinichiro Matsuzono, Takayuki Suzuki, Michael Japs, Mark Burk, Warren Clark
-
Patent number: 10472311Abstract: A 1,4-butanediol-containing composition having a concentration of 1,4-butanediol of 99.00% by weight or more and not more than 99.99% by weight and containing 2-pyrrolidone or N-methylpyrrolidone in a concentration, as converted into a nitrogen atom, of from 1.0 to 25 ppm by weight and methods of use thereof.Type: GrantFiled: May 18, 2016Date of Patent: November 12, 2019Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Yusuke Izawa, Masaru Utsunomiya, Norikazu Konishi, Kouta Tanaka, Takayuki Suzuki, Shinichirou Matsuzono
-
Patent number: 10472465Abstract: The present invention relates to a method for producing a polycarbonate diol, comprising subjecting a compound represented by the following formula (A) containing from 0.01 to 1.0 wt % of an aldehyde derivative, a compound represented by the following formula (B), and a carbonate compound to polycondensation by a transesterification reaction in the presence of a catalyst to produce a polycarbonate diol having a number average molecular weight of 250 to 5,000: HO—(CH2)10—OH??(A) HO—R1—OH??(B) wherein in the formula (B), R1 represents a substituted or unsubstituted divalent alkylene group having a carbon number of 3 to 20, wherein the compound of the formula (A) is not included by the formula (B).Type: GrantFiled: November 22, 2016Date of Patent: November 12, 2019Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Kazunao Kusano, Kazuki Wakabayashi, Yoko Nakagawa, Yusuke Izawa, Yoshikazu Kanamori
-
Patent number: 10450404Abstract: At the time of producing a polyester by using a dicarboxylic acid component and a biomass-resource-derived diol as raw materials, a polyester is efficiently produced with good color tone, as the raw material diol derived from biomass resources, a diol in which the content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 is from 0.01 to 12 ppm by mass, is used, and by controlling the content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 in the raw material diol to fall in a prescribed range, the color tone of the polyester is improved.Type: GrantFiled: December 4, 2014Date of Patent: October 22, 2019Assignees: MITSUBISHI CHEMICAL CORPORATION, Genomatica, Inc.Inventors: Masaru Utsunomiya, Yusuke Izawa, Norikazu Konishi, Kota Tanaka, Shinichiro Matsuzono, Takayuki Suzuki, Michael Japs, Mark Burk, Warren Clark
-
Patent number: 10285587Abstract: [Problem] To allow imaging light to be appropriately received by a second camera in the case where a first imaging mode (color imaging mode) is changed to a second imaging mode (autofluorescence imaging mode). [Solution] In the first imaging mode, using a dichroic mirror 30 allows light LB to be received by both a first camera C1 and a second camera C2. In the second imaging mode, using a transparent glass 31 allows light LB to be received by the second camera C2. With this configuration, both in the first imaging mode and in the second imaging mode, light LB from an ocular fundus is appropriately received by the second camera C2 whereby an appropriate ocular fundus image can be taken.Type: GrantFiled: February 25, 2016Date of Patent: May 14, 2019Assignee: KOWA COMPANY, LTD.Inventor: Yusuke Izawa
-
Patent number: 10253008Abstract: The present invention is aimed to provide an industrially advantageous method for producing a furan compound, in which a furan compound can be efficiently obtained in a high selectivity from a furfural compound. The present invention is concerned with a method for producing a furan compound including feeding, as a raw material, a furfural composition containing a furfural compound into a reactor and subjecting to a decarbonylation reaction in the presence of a catalyst to obtain a furan compound as a product, wherein a furfural dimer concentration in the furfural composition is 1,000 ppm by weight or less, and a peroxide value in the furfural composition is 0.01 mEq/kg or more and 1.0 mEq/kg or less.Type: GrantFiled: July 10, 2018Date of Patent: April 9, 2019Assignee: Mitsubishi Chemical CorporationInventors: Yusuke Izawa, Hideto Tsuji, Yosuke Suzuki
-
Publication number: 20190023674Abstract: The present invention relates to a method for producing furfural, including: obtaining a sugar solution containing at least one of a monosaccharide having 5 carbon atoms and a polysaccharide containing the monosaccharide having 5 carbon atoms by carrying out a reaction with a specific resource as a raw material in the presence of a catalyst in a solvent; converting at least one of the monosaccharide and the polysaccharide containing the monosaccharide in the sugar solution into furfural by a dehydration reaction, so as to obtain a reaction solution; and separating the reaction solution into an organic layer and an aqueous layer, wherein an aromatic hydrocarbon solvent having a density of from 0.90 g/cm3 to 1.1 g/cm3 at 25° C. and under atmospheric pressure is used, and wherein the reaction solution is separated at a temperature higher than 90° C. and lower than 150° C.Type: ApplicationFiled: September 24, 2018Publication date: January 24, 2019Applicant: Mitsubishi Chemical CorporationInventors: Yusuke IZAWA, Yosuke Suzuki, Masaru Utsunomiya
-
Patent number: 10144687Abstract: An object of the present invention is to provide an industrially advantageous production method of 1,4BG, ensuring that generation of THF in the crude 1,4BG can be also suppressed and at the same time, the concentration of 2-(4-hydroxybutoxy)-tetrahydrofuran can be reduced. The present invention relates to a method for producing 1,4-butanediol, comprising heating crude 1,4-butanediol containing from 0.01 to 0.5 wt % of 2-(4-hydroxybutoxy)-tetrahydrofuran and from 1 to 25 wt % of water at 80° C. or more in the presence of an amine to obtain purified 1,4-butanediol.Type: GrantFiled: January 6, 2014Date of Patent: December 4, 2018Assignee: Mitsubishi Chemical CorporationInventors: Yusuke Izawa, Masaru Utsunomiya, Kouta Tanaka, Norikazu Konishi
-
Patent number: 10125109Abstract: The present invention is aimed to provide an industrially advantageous method for producing a furan compound, in which a furan compound can be efficiently obtained in a high selectivity from a furfural compound. The present invention is concerned with a method for producing a furan compound including feeding, as a raw material, a furfural composition containing a furfural compound into a reactor and subjecting to a decarbonylation reaction in the presence of a catalyst to obtain a furan compound as a product, wherein a furfural dimer concentration in the furfural composition is 1,000 ppm by weight or less, and a peroxide value in the furfural composition is 0.01 mEq/kg or more and 1.0 mEq/kg or less.Type: GrantFiled: September 22, 2017Date of Patent: November 13, 2018Assignee: Mitsubishi Chemical CorporationInventors: Yusuke Izawa, Hideto Tsuji, Yosuke Suzuki
-
Publication number: 20180319757Abstract: The present invention is aimed to provide an industrially advantageous method for producing a furan compound, in which a furan compound can be efficiently obtained in a high selectivity from a furfural compound. The present invention is concerned with a method for producing a furan compound including feeding, as a raw material, a furfural composition containing a furfural compound into a reactor and subjecting to a decarbonylation reaction in the presence of a catalyst to obtain a furan compound as a product, wherein a furfural dimer concentration in the furfural composition is 1,000 ppm by weight or less, and a peroxide value in the furfural composition is 0.01 mEq/kg or more and 1.0 mEq/kg or less.Type: ApplicationFiled: July 10, 2018Publication date: November 8, 2018Applicant: Mitsubishi Chemical CorporationInventors: Yusuke Izawa, Hideto Tsuji, Yosuke Suzuki
-
Patent number: 10065938Abstract: The present invention relates to a method for producing a hydride having a carbon number of 4, comprising contacting, in liquid phase, an unsaturated compound having a carbon number of 4 as a raw material with a solid catalyst obtained by loading a metal element belonging to Groups 9 to 11 of the long periodic table on a support, thereby performing hydrogenation to produce a corresponding hydride having a carbon number of 4, wherein hydrogenation is performed in the presence of, as a solvent, a 1,4-butanediol having a nitrogen component concentration of 1 ppm by weight to 1 wt % in terms of nitrogen atom.Type: GrantFiled: June 23, 2016Date of Patent: September 4, 2018Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Yusuke Izawa, Masaru Utsunomiya, Norikazu Konishi, Kouta Tanaka
-
Publication number: 20180064334Abstract: [Problem] To allow imaging light to be appropriately received by a second camera in the case where a first imaging mode (color imaging mode) is changed to a second imaging mode (autofluorescence imaging mode). [Solution] In the first imaging mode, using a dichroic mirror 30 allows light LB to be received by both a first camera C1 and a second camera C2. In the second imaging mode, using a transparent glass 31 allows light LB to be received by the second camera C2. With this configuration, both in the first imaging mode and in the second imaging mode, light LB from an ocular fundus is appropriately received by the second camera C2 whereby an appropriate ocular fundus image can be taken.Type: ApplicationFiled: February 25, 2016Publication date: March 8, 2018Applicant: KOWA COMPANY, LTD.Inventor: Yusuke IZAWA
-
Publication number: 20180009774Abstract: The present invention is aimed to provide an industrially advantageous method for producing a furan compound, in which a furan compound can be efficiently obtained in a high selectivity from a furfural compound. The present invention is concerned with a method for producing a furan compound including feeding, as a raw material, a furfural composition containing a furfural compound into a reactor and subjecting to a decarbonylation reaction in the presence of a catalyst to obtain a furan compound as a product, wherein a furfural dimer concentration in the furfural composition is 1,000 ppm by weight or less, and a peroxide value in the furfural composition is 0.01 mEq/kg or more and 1.0 mEq/kg or less.Type: ApplicationFiled: September 22, 2017Publication date: January 11, 2018Applicant: Mitsubishi Chemical CorporationInventors: Yusuke IZAWA, Hideto Tsuji, Yosuke Suzuki
-
Patent number: 9695140Abstract: An object of the present invention is to provide high-purity gamma-butyrolactone (GBL) capable of preventing occurrence of reaction other than the object at the time of use, which reaction is caused due to a high acidity of GBL, and the present invention relates to a gamma-butyrolactone composition containing gamma-butyrolactone and a nitrogen-containing compound, wherein a content of the gamma-butyrolactone is 99.0% by mass or more, and a total content of the nitrogen-containing compound is 0.1 ppm by mass to 1,000 ppm by mass as converted to a nitrogen atom.Type: GrantFiled: August 17, 2016Date of Patent: July 4, 2017Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shohei Taniguchi, Yusuke Izawa, Masaru Utsunomiya
-
Patent number: 9598388Abstract: The present invention is concerned with a method for producing tetrahydrofuran including carrying out a dehydration cyclization reaction of 1,4-butanediol in the presence of an acid catalyst having a pKa value of not more than 4 within a reactor, wherein a raw material liquid containing 1,4-butanediol to be provided for the reaction contains from 0.01 to 0.35% by weight of 2-(4-hydroxybutoxy)-tetrahydrofuran and 1 ppm by weight or more and not more than 1,000 ppm by weight of at least one of an amine and an amide in terms of a concentration as converted into a nitrogen atom.Type: GrantFiled: January 6, 2014Date of Patent: March 21, 2017Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Yusuke Izawa, Masaru Utsunomiya, Norikazu Konishi, Kouta Tanaka
-
Publication number: 20170073466Abstract: The present invention relates to a method for producing a polycarbonate diol, comprising subjecting a compound represented by the following formula (A) containing from 0.01 to 1.0 wt % of an aldehyde derivative, a compound represented by the following formula (B), and a carbonate compound to polycondensation by a transesterification reaction in the presence of a catalyst to produce a polycarbonate diol having a number average molecular weight of 250 to 5,000: HO—(CH2)10—OH??(A) HO—R1—OH??(B) wherein in the formula (B), R1 represents a substituted or unsubstituted divalent alkylene group having a carbon number of 3 to 20, wherein the compound of the formula (A) is not included by the formula (B).Type: ApplicationFiled: November 22, 2016Publication date: March 16, 2017Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Kazunao KUSANO, Kazuki WAKABAYASHI, Yoko NAKAGAWA, Yusuke IZAWA, Yoshikazu KANAMORI