Patents by Inventor Sunao Maeda
Sunao 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: 20240097653Abstract: In a composite filter device, a first acoustic wave resonator includes a functional electrode on a first main surface of a first piezoelectric substrate, and a wiring electrode is on the first main surface and is not connected to a signal potential. A support is on the first main surface and surrounds the first acoustic wave resonator. A second piezoelectric substrate is on the support and includes a third main surface closer to the support than a fourth main surface. A second acoustic wave resonator includes a functional electrode on the third main surface. The second acoustic wave resonator is a parallel-arm resonator higher in resonant frequency than any other parallel-arm resonator or a series-arm resonator lower in resonant frequency than any other series-arm resonator. The second acoustic wave resonator and the wiring electrode overlap each other when viewed in plan.Type: ApplicationFiled: September 14, 2023Publication date: March 21, 2024Inventors: Yasuhiro SHIMIZU, Sunao YAMAZAKI, Kenta MAEDA
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Patent number: 11426977Abstract: Disclosed are a method for producing a laminate including a step of laminating a resin impregnated fiber reinforced composition layer on a metal member, wherein the method includes a step of forming a resin coating on the metal member and a step of laminating a resin impregnated fiber reinforced composition layer containing a resin impregnated fiber reinforced composition containing (I) 20 to 80% by mass of a polymer having a melting point and/or a glass transition temperature of 50 to 300° C., and (C) 20 to 80% by mass of a reinforcing fiber (provided that the sum of the component (I) and the component (C) is taken as 100% by mass) via the above resin coating; and a laminate obtained by the method.Type: GrantFiled: March 27, 2018Date of Patent: August 30, 2022Assignee: MITSUI CHEMICALS, INC.Inventors: Takeharu Isaki, Sunao Maeda, Masako Yoshida, Yuichi Itou, Kazuaki Kikuchi
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Publication number: 20210114349Abstract: Disclosed are a method for producing a laminate including a step of laminating a resin impregnated fiber reinforced composition layer on a metal member, wherein the method includes a step of forming a resin coating on the metal member and a step of laminating a resin impregnated fiber reinforced composition layer containing a resin impregnated fiber reinforced composition containing (I) 20 to 80% by mass of a polymer having a melting point and/or a glass transition temperature of 50 to 300° C., and (C) 20 to 80% by mass of a reinforcing fiber (provided that the sum of the component (I) and the component (C) is taken as 100% by mass) via the above resin coating; and a laminate obtained by the method.Type: ApplicationFiled: March 27, 2018Publication date: April 22, 2021Applicant: Mitsui Chemicals, Inc.Inventors: Takeharu ISAKI, Sunao MAEDA, Masako YOSHIDA, Yuichi ITOU, Kazuaki KIKUCHI
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Patent number: 8119731Abstract: An object of the present invention is to provide a definitely novel water-based amino resin which is a condensation product of an amino compound (a) having no acid functional group, an amino compound having an acid functional group or an amide compound (b) having an acid functional group, formaldehyde (c) and an alcohol (d), wherein an acid functional group originating in the compound (b) is neutralized with a basic compound (e).Type: GrantFiled: February 1, 2008Date of Patent: February 21, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Gen Miyata, Yoshitomo Saitou, Sunao Maeda
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Patent number: 8053378Abstract: A modified phenolic resin that is an alternate copolymer of at least one phenolic compound selected from phenol, naphthols, and their derivatives and a compound having a divalent connecting group, said modified phenolic resin having a side chain attached to an aromatic ring having a hydroxy group, said side chain being represented by defined formula (1-1). The modified phenolic resin can be used as a hardener for epoxy resins and a cured product thereof has excellent adhesion and flame retardancy without impairing properties of conventional phenolic resins such as gel time, glass transition temperature, moisture absorption, and mechanical properties. The epoxy resin composition can provide excellent adhesion and flame retardancy as hardeners for semiconductor sealing epoxy resins, insulating materials for electrical/electronic components, and laminates (printed circuit boards).Type: GrantFiled: December 16, 2005Date of Patent: November 8, 2011Assignee: Mitsui Chemicals, Inc.Inventors: Takaharu Abe, Sunao Maeda, Tatsuhiro Urakami, Yukio Fukui, Masanobu Maeda, Hiroaki Narisawa
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Publication number: 20100056716Abstract: An object of the present invention is to provide a definitely novel water-based amino resin improving the problems of a butylated amino resin which has excellent physical properties in a coated film but is less liable to be provided with a water base property as compared with a methylated amino resin and a methylated amino resin which is easy to be provided with a water base property but has inferior physical properties in a coated film as compared with a butylated amino resin. The water-based amino resin of the present invention is a water-based amino resin which is a condensation product of an amino compound (a) having no acid functional group, an amino compound having an acid functional group or an amide compound (b) having an acid functional group, formaldehyde (c) and an alcohol (d), wherein an acid functional group originating in the compound (b) is neutralized with a basic compound (e).Type: ApplicationFiled: February 1, 2008Publication date: March 4, 2010Inventors: Gen Miyata, Yoshitomo Saitou, Sunao Maeda
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Patent number: 7541075Abstract: A sealant composition for a plastic liquid display cell is composed of a one-component epoxy resin composition of a base resin liquid and a curing agent liquid, wherein the base resin is a liquid epoxy resin having from 1.7 to 6 in weight average of epoxy groups in one molecule and an ionic conductivity of 2 mS/m or less; and the curing agent has an ionic conductivity of 0.6 mS/m or less. The sealant composition facilitates the fabrication of plastic liquid crystal displays having enhanced durability and sealant properties, particularly in high temperature and high humidity environments.Type: GrantFiled: May 26, 2005Date of Patent: June 2, 2009Assignee: Mitsui Chemicals, Inc.Inventors: Tadashi Kitamura, Hiroshi Kondo, Sunao Maeda
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Publication number: 20080044667Abstract: The modified phenolic resin of the present invention has a specific structure in which a side chain of an aromatic ring having a hydroxyl group in a phenolic resin that is an alternate copolymer of a phenolic compound and a compound having a divalent connecting group, is substituted with a group represented by general formula (1-1). By using the modified phenolic resin as a hardener for epoxy resins, there are provided an epoxy resin, a composition thereof, and a cured product thereof having excellent adhesion and flame retardancy without impairing properties of conventional phenolic resins such as gel time, glass transition temperature, moisture absorption, and mechanical properties. (In the formula, R1 represents a C1-8 linear, branched, or cyclic hydrocarbon group.Type: ApplicationFiled: December 16, 2005Publication date: February 21, 2008Applicant: Mitsui Chemicals, Inc.Inventors: Takaharu Abe, Sunao Maeda, Tatsuhiro Urakami, Yukio Fukui, Masanobu Maeda, Hiroaki Narisawa
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Publication number: 20050249891Abstract: A two-component sealant composition for a plastic liquid crystal display cell of the invention contains the following components (1) to (6): (1) a liquid epoxy resin having from 1.7 to 6 in weight average of epoxy groups in one molecule and an ionic conductivity of an aqueous solution obtained by extraction separation by contact mixing with 10 times by weight of pure water at from 40 to 80° C. of 2 mS/m or less, (2) a curing agent containing one or a mixture of two or more selected from a tetrafunctional mercapto compound, a modified polymercapto derivative, a micro-encapsulated imidazole compound, or a methyl methacrylate adduct of an alicyclic diamine, having an ionic conductivity of an aqueous solution obtained by extraction separation by contact mixing with 10 times by weight of pure water at from 40 to 80° C. of 0.6 mS/m or less, (3) a curing accelerator,(4) an inorganic filler,(5) a silane coupling agent, and (6) rubbery polymer fine particles having a softening temperature of 0° C.Type: ApplicationFiled: May 26, 2005Publication date: November 10, 2005Applicant: Mitsui Chemicals Inc.Inventors: Tadashi Kitamura, Hiroshi Kondo, Sunao Maeda
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Patent number: 6913798Abstract: A sealant composition for a plastic liquid crystal display cell is composed of a two-component epoxy resin composition of a base resin liquid and a curing agent liquid, wherein the base resin is a liquid epoxy resin having from 1.7 to 6 in weight average of epoxy groups in one molecule and an ionic conductivity of 2 mS/m or less; and the curing agent has an ionic conductivity of 0.6 mS/m or less. The sealant composition facilitates the fabrication of plastic liquid crystal displays having enhanced durability and sealant properties, particularly in high temperature and high humidity environments.Type: GrantFiled: June 21, 2001Date of Patent: July 5, 2005Assignee: Mitsui Chemicals, Inc.Inventors: Tadashi Kitamura, Hiroshi Kondo, Sunao Maeda
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Patent number: 6911503Abstract: An epoxy resin composition comprising an epoxy resin (A), a curing agent (B) and a curing accelerator (C), wherein the curing agent (B) is a phenol compound having two or more hydroxyl functional groups or a compound obtained by esterification of the phenol compound or a mixture of these compounds, and the curing accelerator (C) is a salt of a phosphazenium compound represented by a formula (I): (wherein R1s each represent a hydrogen atom, a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms or an aryl or aralkyl group having 6 to 10 carbon atoms and may be all the same or different from one another; and Z? represents a halogen anion, hydroxy anion, alkoxy anion, aryloxy anion or carboxy anion).Type: GrantFiled: September 27, 2002Date of Patent: June 28, 2005Assignee: Mitsui Chemicals, Inc.Inventors: Sunao Maeda, Tatsuhiro Urakami, Tomoyuki Kawabata, Koutarou Suzuki, Tadahito Nobori
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Publication number: 20040260039Abstract: There are disclosed a process for producing an organic compound in the presence of a particular substituted triarylphosphine compound, particularly, a process for producing an oxyalkylene derivative at a high yield using the above compound which is very active and easy to handle, by reacting an organic epoxy compound with a carboxylic acid ester, a carboxylic acid anhydride, a sulfonic acid ester or a carbonic acid ester, and an epoxy resin composition using a particular substituted triarylphosphine compound as a curing accelerator, a cured material of the composition and a semiconductor device using the composition.Type: ApplicationFiled: June 2, 2004Publication date: December 23, 2004Inventors: Naritoshi Yoshimura, Tadahito Nobori, Yoshihiro Yamamoto, Takaomi Hayashi, Shinji Kiyono, Tatsuhiro Urakami, Tomoyuki Kawabata, Sunao Maeda
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Publication number: 20040075802Abstract: A sealant for a liquid crystal display cell which has a water absorption coefficient of 2 mass % or less, and a composition for a liquid crystal display cell sealant comprising an epoxy resin (1), a curing agent (2) comprising at least one selected from polyphenol compounds, polyphenol resins and esterified products thereof and a curing accelerator (3) comprising at least one selected from alkylurea derivatives and phosphazene compounds. A liquid crystal display element produced by using the composition is capable of securing long time display (quality) stability under high temperature and high humidity.Type: ApplicationFiled: October 10, 2003Publication date: April 22, 2004Applicant: MITSUI CHEMICALS, INC.Inventors: Tadashi Kitamura, Sunao Maeda
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Publication number: 20040044167Abstract: An epoxy resin composition comprising an epoxy resin (A), a curing agent (B) and a curing accelerator (C), wherein the curing agent (B) is a phenol compound having two or more functional groups or a compound obtained by esterification of the phenol compound or a mixture of these compounds, and the curing accelerator (C) is a salt of a phosphazenium compound represented by a formula (I): 1Type: ApplicationFiled: May 21, 2003Publication date: March 4, 2004Inventors: Sunao Maeda, Tatsuhiro Urakami, Tomoyuki Kawabata, Koutarou Suzuki, Tadahito Nobori
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Publication number: 20020176046Abstract: An object of the invention is to provide a sealant composition for a plastic liquid crystal display cell that is capable of being applied to a sheet heat press adhesion method and of producing a plastic liquid crystal display cell having high reliability under a high temperature and high humidity environment.Type: ApplicationFiled: February 21, 2002Publication date: November 28, 2002Inventors: Tadashi Kitamura, Hiroshi Kondo, Sunao Maeda
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Patent number: 5824414Abstract: Phenols are reacted with hydrogen peroxide in a solution comprising an organic solvent compatible with water, water, a peroxidase and a dispersing agent to obtain spherical polyphenol particles.Type: GrantFiled: April 17, 1996Date of Patent: October 20, 1998Assignees: Mitsui Chemicals, Inc., Shiro KobayashiInventors: Shiro Kobayashi, Hiroshi Uyama, Sunao Maeda, Shinichirou Tawaki
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Patent number: 5780104Abstract: A method for the homopolymerization or copolymerization of vinyl chloride, wherein the inner wall of the polymerizer and the like are prevented from being fouled with the resulting polymer by applying a coating fluid containing the oxidative polymerization product of a specific phenolic monomer to the surface of the inner wall of the polymerizer and the like, as well as an anti-fouling agent used for this purpose. The method of this invention can very effectively prevent the polymerizer and the like from being fouled with the resulting polymer without affecting the polymerization rate and various properties of the product. Consequently, the necessity of performing the operation for removal of the deposited polymer after completion of each polymerization cycle is eliminated, thus making it possible to achieve closed polymerization requiring no manhole opening after each polymerization cycle which is becoming increasingly popular in recent years.Type: GrantFiled: December 18, 1996Date of Patent: July 14, 1998Assignee: Mitsui Chemicals, Inc.Inventors: Akihiko Takahashi, Sunao Maeda, Yuzo Ono, Masaaki Ozawa, Ichisaburo Nakamura
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Patent number: 5202329Abstract: Pyrimidinyloxy(thio)quinoline derivatives represented by the formula (I) which exhibit an excellent controlling effect for plant diseases and are also safe for crop plants, preparation processes of the derivatives, and agri-horticultural fungicides comprising the derivatives as an active ingredient, are disclosed. ##STR1## In the formula (I), X is an oxygen atom or sulfur atom, Y is a hydrogen atom or halogen atom, Z is a hydrogen atom or methyl, R.sup.1 and R.sup.2 are methoxy or methyl, and n is an integer of 1 or 2.Type: GrantFiled: March 11, 1992Date of Patent: April 13, 1993Assignee: Mitsui Toatsu Chemicals Inc.Inventors: Katsutoshi Ishikawa, Yukihiro Yoshikawa, Tsutomu Ishii, Hiroharu Tanikawa, Sunao Maeda, Hideo Kawashima, Yuji Yanese, Hitoshi Shimotori, Ryuichi Mita
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Patent number: 5178662Abstract: Benzaldehyde acetal compounds represented by the following formula: ##STR1## in which each R is a C.sub.3-8 alkyl group and forms an ether bond with the corresponding oxygen atom of the orthoaldehyde moiety have no injury to crops and, moreover, exhibits superb herbicidal effects owing to the limitation of the number of carbon atoms of each alkyl group to 3-8.Type: GrantFiled: December 16, 1991Date of Patent: January 12, 1993Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Tsutomu Ishii, Katsutoshi Ishikawa, Sunao Maeda, Masatoshi Gohbara, Yasunaga Iwasaki, Makoto Nishida, Sadafumi Koda