Patents by Inventor Tomotaka Wada
Tomotaka Wada 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: 20240094099Abstract: The methods for sample preparation disclosed herein utilize an air phase to reduce aqueous phase associated with magnetic particles bound to nucleic acids to decrease carryover of one or more contaminants, such as, cell debris, chaotropic agents, non-specifically attached molecules, and the like. This air-transfer step is improved by using a combination of a first population of magnetic particles and a second population of magnetic particles, where the first population of magnetic particles is capable of associating with nucleic acids, and the magnetic particles in the second population are at least two-times larger in size than the size of the magnetic particles in the first population. As discussed herein, the use of this second population of magnetic particles improves the transfer of the first population of magnetic particles by reducing loss of the first magnetic particles during the transfer. The sample preparation methods may be semi-automated or completely automated.Type: ApplicationFiled: January 28, 2022Publication date: March 21, 2024Inventors: Austin M. Derfus, Karthikeyan Kumaravadivelu, Kai Yang, Adrian P. Crute, Darren S. Gray, Armando R. Tovar, Tomoko Kobayashi, Tomotaka Komori, Yoshiko Wada, Masato Orikasa, Toru Yoshimura
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Patent number: 10941242Abstract: Provided are an amine compound represented by the following formula (1), which has a low active hydrogen equivalent weight and thus is capable of providing a cured product having good properties because the amine compound has sufficient curability even though the amount of amine compound blended in an epoxy resin composition is small when the amine compound is used as an epoxy resin curing agent, and an amine composition and an epoxy resin curing agent, which contain the compound: wherein A is a 1,2-phenylene group, a 1,3-phenylene group, or a 1,4-phenylene group.Type: GrantFiled: April 4, 2017Date of Patent: March 9, 2021Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Saeko Sato, Yuiga Asai, Tomotaka Wada, Takuma Hanaoka
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Patent number: 10767001Abstract: Provided are: an epoxy resin curing agent containing an amine compound (A) represented by the following general formula (1) and a phenol compound (B), wherein the content of the component (B) is 8 to 35 parts by mass relative to 100 parts by mass of the component (A), an epoxy resin composition containing it, and a carbon fiber-reinforced composite material containing a cured product of the epoxy resin composition and carbon fibers. R1HN—H2C-A-CH2—NHR2 (1) wherein R1 and R2 each independently represent a hydrogen atom, or an aminoalkyl group having 1 to 6 carbon atoms, and A represents a cyclohexylene group or a phenylene group.Type: GrantFiled: March 15, 2017Date of Patent: September 8, 2020Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Yuiga Asai, Tomotaka Wada
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Patent number: 10752729Abstract: A coating film formed by curing of an epoxy resin composition containing at least an epoxy resin, an epoxy resin curing agent and a solvent, wherein the coating film contains the solvent in a ratio of 1% by mass or more and 20% by mass or less, and the epoxy resin curing agent is a reaction product of the following (A) and (B). (A) At least one selected from the group consisting of metaxylylenediamine and paraxylylenediamine. (B) At least one selected from the group consisting of an unsaturated carboxylic acid represented by the following formula (1) and a derivative thereof: wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an aralkyl group having 1 to 8 carbon atoms, or an aryl group.Type: GrantFiled: June 1, 2016Date of Patent: August 25, 2020Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Kazuki Kouno, Saeko Sato, Tomotaka Wada, Yuiga Asai
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Publication number: 20190119435Abstract: Provided are: an epoxy resin curing agent containing an amine compound (A) represented by the following general formula (1) and a phenol compound (B), wherein the content of the component (B) is 8 to 35 parts by mass relative to 100 parts by mass of the component (A), an epoxy resin composition containing it, and a carbon fiber-reinforced composite material containing a cured product of the epoxy resin composition and carbon fibers. R1HN—H2C-A-CH2——NHR2 (1) wherein R1 and R2 each independently represent a hydrogen atom, or an aminoalkyl group having 1 to 6 carbon atoms, and A represents a cyclohexylene group or a phenylene group.Type: ApplicationFiled: March 15, 2017Publication date: April 25, 2019Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Yuiga ASAI, Tomotaka WADA
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Publication number: 20190112416Abstract: Provided are an amine compound represented by the following formula (1), which has a low active hydrogen equivalent weight and thus is capable of providing a cured product having good properties because the amine compound has sufficient curability even though the amount of amine compound blended in an epoxy resin composition is small when the amine compound is used as an epoxy resin curing agent, and an amine composition and an epoxy resin curing agent, which contain the compound: wherein A is a 1,2-phenylene group, a 1,3-phenylene group, or a 1,4-phenylene group.Type: ApplicationFiled: April 4, 2017Publication date: April 18, 2019Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Saeko SATO, Yuiga ASAI, Tomotaka WADA, Takuma HANAOKA
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Patent number: 10233295Abstract: A fiber-reinforced composite material of the present invention is a fiber-reinforced composite material comprising: an epoxy resin cured product obtained by curing an epoxy resin composition and a reinforcing fiber, wherein the epoxy resin composition comprises an epoxy resin (A) and a curing agent (B); 10 to 80% by mass of the curing agent (B) is 1,2,4-cyclohexanetricarboxylic acid-1,2-anhydride; and the reinforcing fiber comprises one or more selected from the group consisting of a carbon fiber, an aramid fiber, and a boron fiber.Type: GrantFiled: April 8, 2015Date of Patent: March 19, 2019Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Yuiga Asai, Tomotaka Wada
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Publication number: 20180118877Abstract: A coating film formed by curing of an epoxy resin composition containing at least an epoxy resin, an epoxy resin curing agent and a solvent, wherein the coating film contains the solvent in a ratio of 1% by mass or more and 20% by mass or less, and the epoxy resin curing agent is a reaction product of the following (A) and (B). (A) At least one selected from the group consisting of metaxylylenediamine and paraxylylenediamine. (B) At least one selected from the group consisting of an unsaturated carboxylic acid represented by the following formula (1) and a derivative thereof: wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an aralkyl group having 1 to 8 carbon atoms, or an aryl group.Type: ApplicationFiled: June 1, 2016Publication date: May 3, 2018Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Kazuki KOUNO, Saeko SATO, Tomotaka WADA, Yuiga ASAI
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Patent number: 9745410Abstract: There are provided a novel aromatic aldehyde compound capable of providing an epoxy resin coating film and an epoxy resin cured material satisfying all of the excellent surface property (smoothness, gloss), drying property, water resistance, transparency and adhesion, and an epoxy resin curing agent and an epoxy resin composition containing the aromatic aldehyde compound. The aromatic aldehyde has a branched alkyl group having 10 to 14 carbon atoms.Type: GrantFiled: May 17, 2013Date of Patent: August 29, 2017Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Mitsuharu Kitamura, Yutaka Matsuura, Hisayuki Kuwahara, Tomotaka Wada, Yuiga Asai
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Publication number: 20170037201Abstract: A fiber-reinforced composite material of the present invention is a fiber-reinforced composite material comprising: an epoxy resin cured product obtained by curing an epoxy resin composition and a reinforcing fiber, wherein the epoxy resin composition comprises an epoxy resin (A) and a curing agent (B); 10 to 80% by mass of the curing agent (B) is 1,2,4-cyclohexanetricarboxylic acid-1,2-anhydride; and the reinforcing fiber comprises one or more selected from the group consisting of a carbon fiber, an aramid fiber, and a boron fiber.Type: ApplicationFiled: April 8, 2015Publication date: February 9, 2017Applicant: Mitsubishi Gas Chemical Company, Inc.Inventors: Yuiga ASAI, Tomotaka WADA
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Patent number: 9233909Abstract: The present invention relates to a process for producing an amino compound by subjecting a polyamine and an alkenyl compound to addition reaction in the presence of an alkali metal hydride compound which is capable of supplying the amino compound in a stable manner without occurrence of odor.Type: GrantFiled: January 16, 2012Date of Patent: January 12, 2016Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Hisayuki Kuwahara, Tomotaka Wada
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Publication number: 20150111991Abstract: There are provided a novel aromatic aldehyde compound capable of providing an epoxy resin coating film and an epoxy resin cured material satisfying all of the excellent surface property (smoothness, gloss), drying property, water resistance, transparency and adhesion, and an epoxy resin curing agent and an epoxy resin composition containing the aromatic aldehyde compound. The aromatic aldehyde has a branched alkyl group having 10 to 14 carbon atoms.Type: ApplicationFiled: May 17, 2013Publication date: April 23, 2015Applicant: Mitsubishi Gas Chemical Company, Inc.Inventors: Mitsuharu Kitamura, Yutaka Matsuura, Hisayuki Kuwahara, Tomotaka Wada, Yuiga Asai
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Publication number: 20130303805Abstract: The present invention relates to a process for producing an amino compound by subjecting a polyamine and an alkenyl compound to addition reaction in the presence of an alkali metal hydride compound which is capable of supplying the amino compound in a stable manner without occurrence of odor.Type: ApplicationFiled: January 16, 2012Publication date: November 14, 2013Applicant: Mitsubishi Gas Chemical Company, Inc.Inventors: Hisayuki Kuwahara, Tomotaka Wada