Patents by Inventor Hideharu Iwasaki
Hideharu Iwasaki 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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Patent number: 8110124Abstract: To produce fluorescent bodies providing high brightness and high energy efficiency, a method of preparing a fluorescent body precursor is provided to enable an activator having a large ionic radius to be doped arbitrarily. The problems described above are solved by a method of preparing a fluorescent body precursor, which method is characterized by comprising applying a shock pressure of 0.1 GPa or higher to a mixture consisting essentially of a fluorescent body base, an activator and a co-activating particle-growth promoter to dope the activator into the fluorescent body base in the presence of the co-activating particle-growth promoter.Type: GrantFiled: July 26, 2007Date of Patent: February 7, 2012Assignee: Kuraray Co., Ltd.Inventors: Yoshihisa Tsuji, Hideharu Iwasaki
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Publication number: 20120027668Abstract: The object of the present invention is to provide a method of producing low valence titanium oxides in a steady supply manner acceptable in industrial production. The low valence titanium oxides are produced by electrical discharge between two electrodes in an aqueous medium, wherein at least one of the electrodes is a titanium-containing electrode.Type: ApplicationFiled: March 11, 2010Publication date: February 2, 2012Applicants: KURARAY CO., LTD., NAT.UNIV.CORP. KUMAMOTO UNIV.Inventors: Tsutomu Mashimo, Omurzak Uulu Emil, Naoto Kameyama, Makoto Okamoto, Yoshiaki Yasuda, Hideharu Iwasaki
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Patent number: 8105060Abstract: A target capsule includes (A) a pedestal having a central projection, (B) a pedestal aid attached to the central projection so as to define a sample-loading assembly, and (C) an impact-receiving member, wherein the components (A), (B), and (C) are detachable from each other. The impact target capsule can be readily loaded with a sample, allows the sample to be easily retrieved after application of impact pressure, and can be used repeatedly, and thereby the capsule can be preferably used as an impact compression apparatus in combination with a single-stage powder gun or a single-stage gas gun.Type: GrantFiled: August 31, 2007Date of Patent: January 31, 2012Assignee: Kuraray Co., Ltd.Inventors: Hideharu Iwasaki, Takayuki Ikeda, Hideaki Fujiwara, Yoshihisa Tsuji
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Publication number: 20120018675Abstract: The present invention provides an Al—C—O based phosphor using neither heavy metal nor rare metal and composed of elements with high environmental compatibility and excellent economic efficiency, wherein the wavelength of the peak intensity of the emission spectrum can be changed without changing the basic composition. An aluminum oxide phosphor which comprises aluminum (Al), carbon (C), and oxygen (O) respectively in an amount of 30 mol %<Al<60 mol %, 0 mol %<C<10 mol %, 30 mol %<O<70 mol % is provided. The above problem is solved in the production of an Al—C—O phosphor comprising aluminum (Al), carbon (C), and oxygen (O) by heating and firing a mixture comprising an aluminum-containing compound and a coordinatable oxygen-containing compound.Type: ApplicationFiled: March 31, 2010Publication date: January 26, 2012Applicants: Kuraray Co., Ltd., Hiroshima UniversityInventors: Kikuo Okuyama, Ferry Iskandar, Yutaka Kaihatsu, Jun Takai, Hideharu Iwasaki
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Patent number: 8088353Abstract: A process for producing a Group II metal sulfide phosphor precursor, comprising adding to an organic solvent an aqueous solution containing at least one of a Group II element compound, a sulfurizing agent, and a compound containing any of copper, silver, manganese, gold, and rare-earth elements to obtain a reaction mixture, heating the reaction mixture to produce an azeotrope of the water and the organic solvent, and removing water from the reaction mixture to produce a desired Group II metal sulfide in the reaction mixture, wherein the removal of water from the reaction mixture occurs by recovering only the water condensed from a vapor produced by the azeotropic distillation.Type: GrantFiled: November 11, 2008Date of Patent: January 3, 2012Assignee: Kuraray Co., Ltd.Inventors: Jun Takai, Yoshihisa Tsuji, Hideharu Iwasaki
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Publication number: 20110260108Abstract: A method of producing an M-C—N—O based phosphor with reduced non-uniform emission and improved color purity is provided. The method of producing an M-C—N—O based phosphor comprising a group IIIB element (M), carbon (C), nitrogen (N) and oxygen (O) comprises: heating a mixture comprising a group IIIB element-containing compound and a nitrogen-containing organic compound to form a pyrolysate; disintegrating the resulting pyrolysate-containing product; and firing the disintegrated product.Type: ApplicationFiled: December 7, 2009Publication date: October 27, 2011Applicants: KURARAY CO., LTD., HIROSHIMA UNIVERSITYInventors: Jun Takai, Hideharu Iwasaki, Ferry Iskandar, Kikuo Okuyama
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Patent number: 8044149Abstract: Provision of, in a process of producing a hydrogenated polymer, which comprises steps of sequentially performing, in the presence of a ruthenium carbene complex, a ring-opening metathesis polymerization reaction of a cyclic olefin and a hydrogenation reaction of a ring-opening metathesis polymer produced by the polymerization reaction to give a hydrogenated polymer, a simple and economic process of obtaining a hydrogenated polymer having an extremely small content of residual ruthenium derived from the ruthenium carbene complex. A process of producing a hydrogenated polymer, which comprises, in the presence of a ruthenium carbene complex, subjecting a cyclic monoolefin and/or a cyclic diolefin to a ring-opening metathesis polymerization, hydrogenating the resulting ring-opening metathesis polymer to give a hydrogenated polymer, and bringing the hydrogenated polymer in contact with a poor solvent of the hydrogenated polymer in the presence of dissolved hydrogen to allow precipitation.Type: GrantFiled: September 20, 2007Date of Patent: October 25, 2011Assignee: Kuraray Co., Ltd.Inventors: Hideharu Iwasaki, Yasutaka Inubushi
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Publication number: 20110147663Abstract: The present invention provides a method for producing a zinc sulfide based phosphor by firing a zinc sulfide based phosphor precursor, comprising at least: a first firing step of firing a mixture containing a zinc sulfide based phosphor precursor, sulfur, and a chlorine-containing flux; and a second firing step of further firing the fired product obtained from the first firing step, wherein the first firing step comprises: heating the mixture in an atmosphere wherein an air stream is introduced so that a temperature of the mixture is increased from normal temperature to a transformation temperature at which a crystal system of the phosphor precursor is transformed; when a temperature of the mixture is increased above the transformation temperature, switching the atmosphere to a nitrogen atmosphere and continuing the heating of the mixture; and when the temperature of the mixture reaches a temperature in a range of 1000° C. to 1200° C.Type: ApplicationFiled: July 30, 2009Publication date: June 23, 2011Applicant: KURARAY CO. LTD.Inventors: Yoshihisa Tsuji, Kazuma Inoue, Jun Takai, Hideharu Iwasaki
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Patent number: 7893145Abstract: The present invention provides an oxygen-absorbing resin composition containing a thermoplastic resin (A) having carbon-carbon double bonds substantially only in the main chain and a transition metal salt (B), and the oxygen absorption amount of 1 mol of carbon-carbon double bond of the thermoplastic resin (A) being 1.6 mols or more.Type: GrantFiled: April 27, 2007Date of Patent: February 22, 2011Assignee: Kuraray Co., Ltd.Inventors: Yasutaka Inubushi, Tatsuhiko Hayashibara, Hideharu Iwasaki, Kazuhiro Kurosaki, Emi Yatagai, Tomoyuki Watanabe, Mie Kanehara
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Publication number: 20110020213Abstract: An object is to provide a novel anatase titanium oxide having especially high photocatalytic activity as a photocatalyst useful as a material for environmental clean-up, such as removal of toxic substances, deodorization and decomposition of malodorous substances, prevention of fouling and sterilization, and a method of producing such an anatase titanium oxide. There is provided a titanium oxide having a reflectance of 80% or lower with respect to light having a wavelength of 400 nm to 700 nm. There is also provided a method of producing an anatase titanium oxide, comprising creating pulsed plasma by an electric current of lower than 5 amperes between titanium electrodes in water to oxidize a titanium. Preferably, the titanium oxide has a percentage weight loss of 1.0% or lower when heated at a temperature within the range of 400° C. to 800° C., and has the anatase structure or the anatase and rutile structures.Type: ApplicationFiled: December 26, 2008Publication date: January 27, 2011Applicants: NATIONAL UNIVERSITY CORP KUMAMOTO UNIVERSITY, KURARAY CO., LTD.Inventors: Tsutomu Mashimo, Omurzak Uulu Emil, Sulaimankulova Saadat, Makoto Okamoto, Hideharu Iwasaki
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Publication number: 20100320426Abstract: An object of the invention is to provide a method for the stable production of a high-purity Group II-VI compound semiconductor on an industrial scale, and also a hexagonal crystal of Group II-VI compound semiconductor in which a metal can be doped easily. Another object of the invention is to provide a method of producing a Group II-VI compound semiconductor phosphor. The objects are achieved by a method of producing a Group II-VI compound semiconductor comprising generating a pulsed electrical discharge plasma between metallic electrodes in sulfur to produce a Group II-VI compound semiconductor; a method of producing a Group II-VI compound semiconductor phosphor using a pulsed electrical discharge plasma; and a hexagonal crystal of Group II-VI compound semiconductor composed of a plurality of twin crystals.Type: ApplicationFiled: February 5, 2009Publication date: December 23, 2010Applicants: National University Corp. Kumamoto University, KURARAY CO., LTD.Inventors: Tsutomu Mashimo, Omurzak Uulu Emil, Makoto Okamoto, Hideharu Iwasaki
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Patent number: 7842843Abstract: To provide a C4 fraction that contains significantly reduced amounts of butynes and methylallene and to provide a process for low-cost and effective production of ethers in which the C4 fraction is used as the starting material for a telomerization process. A mixture containing 25 to 80 mass % 1,3-butadiene, 13 to 68 mass % butenes and 2 to 15 mass % butanes with butynes and methylallene being contained in amounts of 50 ppm or less and 5 to 800 ppm, respectively.Type: GrantFiled: November 29, 2006Date of Patent: November 30, 2010Assignee: Kuraray Co., Ltd.Inventors: Jin Tokuyasu, Hideharu Iwasaki
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Publication number: 20100260662Abstract: The process of the invention is provided to achieve uniform doping of an activator metal into phosphor particles and to improve efficiency of utlization of a metal element to be used in the production of a Group II metal sulfide phosphor and a precursor thereof. Specifically, the object of the invention is achieved by a process for producing a Group II metal sulfide phosphor precursor, comprising adding to an organic solvent an aqueous solution containing at least one of a Group II element compound, a sulfurizing agent, and a compound containing any of copper, silver, manganese, gold, and rare-earth elements to obtain a reaction mixture, heating the reaction mixture to produce an azeotrope of the water and the organic solvent, and removing the water from the reaction mixture to produce a desired Group II metal sulfide in the reaction mixture, wherein the removal of the water from the reaction mixture is carried out by recovering only the water condensed from a vapor produced by the azeotropic distillation.Type: ApplicationFiled: November 11, 2008Publication date: October 14, 2010Applicant: Kuraray Co., Ltd.Inventors: Jun Takai, Yoshihisa Tsuji, Hideharu Iwasaki
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Publication number: 20100193218Abstract: A polarizable electrode to be used in an electric double layer capacitor, which has an excellent depressing effect on the generation of gas, is coated on the surface thereof with a thin film layer of a gelling organic polymer compound whose thickness is less than 5 ?m. As the gelling organic polymer compound, organic polymer compounds having —COO— bonds, or preferably acrylic polymers, can be used. Specific examples thereof include polyalkyl methacrylate or polyalkyl acrylate, which are capable of forming a stereocomplex. Among these, poly(methyl methacrylate) is preferable. Polyvinylidene fluoride resins can also be preferably used. It is preferable that an electrical double layer capacitor include a pair of polarizable electrodes and a separator disposed therebetween and that at least one of the pair of polarizable electrodes be the above-described polarizable electrode having an excellent depressing effect on the gas generation.Type: ApplicationFiled: September 6, 2006Publication date: August 5, 2010Applicant: Kuraray Co., Ltd.Inventors: Nozomu Sugo, Hideharu Iwasaki
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Patent number: 7759289Abstract: In activated carbon obtained by subjecting a carbonaceous material to an activation treatment, the overall content of alkali metals is set at 100 ppm or less, or the overall content of heavy metals is set at 20 ppm or less and the overall content of alkali metals is set at 200 ppm or less. In cases where such activated carbon is used as a raw material in electronic devices, the formation of dendrites by the reductive deposition of alkali metals or heavy metals tends not to occur, so that problems such as short-circuiting or the like tend not to arise, and a good rate of self-discharge retention is shown.Type: GrantFiled: July 3, 2003Date of Patent: July 20, 2010Assignees: Kuraray Chemical Co., Ltd., Honda Giken Kogyo Kabushiki KaishaInventors: Hideharu Iwasaki, Nozomu Sugo, Mitsunori Hitomi, Shushi Nishimura, Takeshi Fujino, Shigeki Oyama, Yuji Kawabuchi
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Patent number: 7745666Abstract: A bisphosphite represented by the general formula (I): General Formula (I) (in the formula, A represents an alkylene group which may have a substituent, a cycloalkylene group which may have a substituent, a phenylene group which may have a substituent, or a naphthylene group which may have a substituent; and R1 represents a hydrogen atom or an alkyl group) and a method for producing an aldehyde including reacting a non-conjugated diene having a carbon-carbon double bond in a molecular end and having from 6 to 20 carbon atoms with a carbon monoxide and hydrogen in the presence of such a bisphosphite and a group 8 to 10 metal compound, are provided.Type: GrantFiled: April 3, 2007Date of Patent: June 29, 2010Assignee: Kuraray Co., Ltd.Inventors: Takashi Sugioka, Jin Tokuyasu, Takuo Tsuruta, Hideharu Iwasaki
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Patent number: 7728180Abstract: A method for producing ethers comprises the following steps: initiating telomerization process of a conjugated diene compound with an hydroxyl compound represented by the following formula (I): R1OH??(I) in the presence of a palladium compound, a tertiary isocyanide represented by the following formula (II): R2NC??(II), and a base; and adding halfway through the telomerization process a tertiary phosphine represented by the following formula (III): PR3R4R5??(III) (the respective symbols are defined in the description).Type: GrantFiled: June 8, 2005Date of Patent: June 1, 2010Assignee: Kuraray Co., Ltd.Inventors: Jin Tokuyasu, Taketoshi Okuno, Takashi Hori, Hideharu Iwasaki
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Publication number: 20100109508Abstract: M-C—N—O based phosphors having high emission intensity are provided without using heavy metals, rare metals, and special activator agents. Colors of the M-C—N—O based phosphors can be changed by adjusting a peak top of an emission spectrum. Highly environmentally-compatible polymer dispersions, inorganic EL devices, light emitting devices, fluorescent tubes, and the like are also provided, which use the M-C—N—O based phosphors. The M-C—N—O based phosphors of the present invention comprise a group IIIB element (M), carbon (C), nitrogen (N), and oxygen (O). Colors are changed by changing an amount of carbon (C) contained in the M-C—N—O based phosphors. The polymer dispersions, inorganic EL devices, light emitting devices, and fluorescent tubes are produced using the M-C—N—O based phosphors.Type: ApplicationFiled: February 29, 2008Publication date: May 6, 2010Applicants: HIROSHIMA UNIVERSITY, KURARAY LUMINAS CO., LTD.Inventors: Kikuo Okuyama, Akihiro Yabuki, Ferry Iskandar, Takashi Ogi, Jun Takai, Hideharu Iwasaki
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Patent number: 7709415Abstract: Activated carbon useful as polarizable electrode material for an electric double-layer capacitor can be obtained by mixing a carbonaceous material and an alkali metal hydroxide while maintaining a solid state, granulating the obtained mixture while maintaining its solid state, dehydrating the obtained granulated substance while maintaining its solid state, and subjecting the granulated dehydration product obtained in the dehydration step to an activation treatment. The preferred pressure of the granulation treatment in the granulation step is 0.01 to 300 Torr, and the preferred temperature of the granulation treatment is 90 to 140° C. The preferred pressure of the dehydration treatment in the dehydration step is 0.01 to 10 Torr, and the preferred temperature of the dehydration treatment is 200 to 400° C.Type: GrantFiled: April 22, 2003Date of Patent: May 4, 2010Assignees: Kuraray Chemical Co., Ltd., Honda Giken Kogyo Kabushiki KaishaInventors: Nozomu Sugo, Hideharu Iwasaki, Takanori Kitamura, Tatsuo Morotomi, Tsuyoshi Kowaka, Teruhiro Okada, Shushi Nishimura, Takeshi Fujino, Shigeki Oyama, Yuji Kawabuchi
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Patent number: 7700698Abstract: A process of producing a ring-opening metathesis polymer characterized in that a treatment to decrease the amount of oxygen and/or peroxide in at least one kind of polymerization starting material is performed prior to the ring-opening metathesis polymerization reaction of a cyclic olefin performed in the presence of a ruthenium carbene complex (catalyst). Treatments to decrease the amount of oxygen and/or peroxide include applying an adsorbent to a polymerization starting material to remove oxygen and/or peroxide by adsorption, applying an antioxidant to a polymerization starting material to decompose oxygen or peroxide, and the like.Type: GrantFiled: February 7, 2006Date of Patent: April 20, 2010Assignee: Kuraray Co., Ltd.Inventors: Hideharu Iwasaki, Yasutaka Inubushi