Patents by Inventor Takayuki Maehara
Takayuki Maehara 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: 11254821Abstract: A silicone oil-treated fumed silica and a method of producing the silicone oil-treated fumed silica are provided. The silicone oil-treated fumed silica, which has the following physical properties: A) the silicone oil-treated fumed silica has a degree of hydrophobicity of 68 vol % or more; B) the silicone oil-treated fumed silica has a silicone oil fixation rate of from 60 mass % to 95 mass %; and C) a composition obtained by adding 6 parts by mass of the silicone oil-treated fumed silica to 100 parts by mass of an amine composition containing trimethylolpropane polyoxypropylene triamine and 1,3-bis(aminomethyl)cyclohexane at a mass ratio of 95:5 has a viscosity of 4,000 mPa·s or more after the composition is left to stand at 25° C. for 1 hour.Type: GrantFiled: March 27, 2018Date of Patent: February 22, 2022Inventors: Takayuki Maehara, Qingtao Zhou, Jianzhang Dai
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Publication number: 20210115262Abstract: A silicone oil-treated fumed silica and a method of producing the silicone oil-treated fumed silica are provided. The silicone oil-treated fumed silica, which has the following physical properties: A) the silicone oil-treated fumed silica has a degree of hydrophobicity of 68 vol % or more; B) the silicone oil-treated fumed silica has a silicone oil fixation rate of from 60 mass % to 95 mass %; and C) a composition obtained by adding 6 parts by mass of the silicone oil-treated fumed silica to 100 parts by mass of an amine composition containing trimethylolpropane polyoxypropylene triamine and 1,3-bis(aminomethyl)cyclohexane at a mass ratio of 95:5 has a viscosity of 4,000 mPa·s or more after the composition is left to stand at 25° C. for 1 hour.Type: ApplicationFiled: March 27, 2018Publication date: April 22, 2021Inventors: Takayuki MAEHARA, Qingtao ZHOU, Jianzhang DAI
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Patent number: 9079777Abstract: The present invention relates to a method for producing inorganic oxide particles, comprising at least the following steps of: coagulating a dispersion obtained by carrying out the hydrolysis reaction and the polycondensation reaction of a metal alkoxide in the presence of a basic catalyst; filtering the dispersion to obtain particles; and drying the particles, wherein the step of coagulating the dispersion is carried out by adding a coagulant comprising at least one compound selected from the group consisting of carbon dioxide, ammonium carbonate, ammonium hydrogen carbonate and ammonium carbamate to the dispersion. The inorganic oxide particles obtained by the method of the present invention have high purity and are excellent in flowability.Type: GrantFiled: November 5, 2014Date of Patent: July 14, 2015Assignee: TOKUYAMA CORPORATIONInventors: Takayuki Maehara, Tadaharu Komatsubara, Yuya Yamano, Kenichi Ishizu, Makoto Sato, Hiroaki Taira, Hiroshi Kato
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Patent number: 9000202Abstract: The present invention relates to a method for producing inorganic oxide particles, comprising at least the following steps of: coagulating a dispersion obtained by carrying out the hydrolysis reaction and the polycodensation reaction of a metal alkoxide in the presence of a basic catalyst; filtering the dispersion to obtain particles; and drying the particles, wherein the step of coagulating the dispersion is carried out by adding a coagulant comprising at least one compound selected from the group consisting of carbon dioxide, ammonium carbonate, ammonium hydrogen carbonate and ammonium carbamate to the dispersion. The inorganic oxide particles obtained by the method of the present invention have high purity and are excellent in flowability.Type: GrantFiled: February 18, 2011Date of Patent: April 7, 2015Assignee: Tokuyama CorporationInventors: Takayuki Maehara, Tadaharu Komatsubara, Yuya Yamano, Kenichi Ishizu, Makoto Sato, Hiroaki Taira, Hiroshi Kato
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Publication number: 20150056119Abstract: The present invention relates to a method for producing inorganic oxide particles, comprising at least the following steps of: coagulating a dispersion obtained by carrying out the hydrolysis reaction and the polycondensation reaction of a metal alkoxide in the presence of a basic catalyst; filtering the dispersion to obtain particles; and drying the particles, wherein the step of coagulating the dispersion is carried out by adding a coagulant comprising at least one compound selected from the group consisting of carbon dioxide, ammonium carbonate, ammonium hydrogen carbonate and ammonium carbamate to the dispersion. The inorganic oxide particles obtained by the method of the present invention have high purity and are excellent in flowability.Type: ApplicationFiled: November 5, 2014Publication date: February 26, 2015Applicant: TOKUYAMA CORPORATIONInventors: Takayuki MAEHARA, Tadaharu KOMATSUBARA, Yuya YAMANO, Kenichi ISHIZU, Makoto SATO, Hiroaki TAIRA, Hiroshi KATO
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Publication number: 20120323030Abstract: The present invention relates to a method for producing inorganic oxide particles, comprising at least the following steps of: coagulating a dispersion obtained by carrying out the hydrolysis reaction and the polycodensation reaction of a metal alkoxide in the presence of a basic catalyst; filtering the dispersion to obtain particles; and drying the particles, wherein the step of coagulating the dispersion is carried out by adding a coagulant comprising at least one compound selected from the group consisting of carbon dioxide, ammonium carbonate, ammonium hydrogen carbonate and ammonium carbamate to the dispersion. The inorganic oxide particles obtained by the method of the present invention have high purity and are excellent in flowability.Type: ApplicationFiled: February 18, 2011Publication date: December 20, 2012Inventors: Takayuki Maehara, Tadaharu Komatsubara, Yuya Yamano, Kenichi Ishizu, Makoto Sato, Hiroaki Taira, Hiroshi Kato
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Patent number: 7995984Abstract: The present invention aims to reduce an exclusively-possessed area of each of bonding wires mounted over a wiring board, for coupling a power amplifying unit of a semiconductor chip and an antenna switch of a second semiconductor chip in a semiconductor device that configures an RF module. In the RF module, the first semiconductor chip and the second semiconductor chip are mounted side by side in a central area of the wiring board. The first semiconductor chip is formed with amplifier circuits and a control circuit and comprises a silicon substrate or a compound semiconductor substrate. On the other hand, the second semiconductor chip is formed with an antenna switch and comprises the silicon substrate or compound semiconductor substrate. Pads of the first semiconductor chip and pads of the second semiconductor chip are respectively electrically coupled to one another.Type: GrantFiled: October 3, 2008Date of Patent: August 9, 2011Assignee: Renesas Electronics CorporationInventors: Tomoaki Kudaishi, Satoshi Sakurai, Takayuki Tsutsui, Masashi Yamaura, Reiichi Arai, Takayuki Maehara
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Publication number: 20100217033Abstract: The present invention discloses a method for producing a polymerizable hydroxydiamantyl ester compound, which comprises di-halogenating a raw material compound having a diamantane skeleton, such as diamantane or the like, then hydrolyzing the di-halogenation product to produce a 4,9-diamantanediol compound, thereafter esterifying the 4,9-diamantanediol compound in a mixture of a polymerizable unsaturated carboxylic acid and a polymerizable unsaturated carboxylic acid anhydride in the presence of a polymerization inhibitor and an acid catalyst, to obtain a polymerizable hydroxydiamantyl ester compound.Type: ApplicationFiled: December 13, 2006Publication date: August 26, 2010Inventor: Takayuki Maehara
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Patent number: 7714153Abstract: A 4,9-bis(glycidyloxy)diamantane and a 4,9-bis[(3-ethyloxetane-3-yl)methyloxy]diamantane are novel curable diamantane compounds, and cured bodies thereof are useful as encapsulants exhibiting excellent light resistance and heat resistance, and can be favorably used, for example, as encapsulants for near ultraviolet LEDs and white LEDs.Type: GrantFiled: September 29, 2005Date of Patent: May 11, 2010Assignee: Tokuyama CorporationInventor: Takayuki Maehara
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Publication number: 20090130996Abstract: The present invention aims to reduce an exclusively-possessed area of each of bonding wires mounted over a wiring board, for coupling a power amplifying unit of a semiconductor chip and an antenna switch of a second semiconductor chip in a semiconductor device that configures an RF module. In the RF module, the first semiconductor chip and the second semiconductor chip are mounted side by side in a central area of the wiring board. The first semiconductor chip is formed with amplifier circuits and a control circuit and comprises a silicon substrate or a compound semiconductor substrate. On the other hand, the second semiconductor chip is formed with an antenna switch and comprises the silicon substrate or compound semiconductor substrate. Pads of the first semiconductor chip and pads of the second semiconductor chip are respectively electrically coupled to one another.Type: ApplicationFiled: October 3, 2008Publication date: May 21, 2009Inventors: Tomoaki Kudaishi, Satoshi Sakurai, Takayuki Tsutsui, Masashi Yamaura, Reiichi Arai, Takayuki Maehara
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Patent number: 7472188Abstract: A storing unit includes a predetermined number of present value buffers that store the present value in time series, and a predetermined number of section-representative-value buffers that store a section representative value calculated based on the present value belonging to a predetermined section included in the monitoring period in time series. A storage control unit performs, when the present value is acquired, a control for storing data in the present value buffers and the section-representative-value buffers. A calculating unit calculates a period representative value of the monitoring period based on the present value and the section representative value stored in the storing unit.Type: GrantFiled: May 13, 2005Date of Patent: December 30, 2008Assignee: Fujitsu LimitedInventors: Motohisa Nakamura, Takayuki Maehara
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Patent number: 7420666Abstract: In a method for performing OTDR measurement in an optical transmission system including a first terminal station and a second terminal station, OTDR signal light is transmitted from an OTDR provided in the first terminal station to the second terminal station, in which the OTDR signal light is Raman amplified by using main signal light of the optical transmission system as pump light.Type: GrantFiled: April 5, 2007Date of Patent: September 2, 2008Assignees: Fujitsu Limited, Nippon Telegraph and Telephone CorporationInventors: Takayuki Maehara, Shinichirou Harasawa, Gentaro Funatsu, Hideki Maeda, Akira Naka
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Publication number: 20080071052Abstract: A 4,9-bis(glycidyloxy)diamantane and a 4,9-bis[(3-ethyloxetane-3-yl)methyloxy]diamantane are novel curable diamantane compounds, and cured bodies thereof are useful as encapsulants exhibiting excellent light resistance and heat resistance, and can be favorably used, for example, as encapsulants for near ultraviolet LEDs and white LEDs.Type: ApplicationFiled: September 29, 2005Publication date: March 20, 2008Applicant: TOKUYAMA CORPORATIONInventor: Takayuki Maehara
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Publication number: 20070183785Abstract: In a method for performing OTDR measurement in an optical transmission system including a first terminal station and a second terminal station, OTDR signal light is transmitted from an OTDR provided in the first terminal station to the second terminal station, in which the OTDR signal light is Raman amplified by using main signal light of the optical transmission system as pump light.Type: ApplicationFiled: April 5, 2007Publication date: August 9, 2007Applicants: FUJITSU LIMITED, NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takayuki Maehara, Shinichirou Harasawa, Gentaro Funatsu, Hideki Maeda, Akira Naka
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Patent number: 7215415Abstract: In a method for performing OTDR measurement in an optical transmission system including a first terminal station and a second terminal station, OTDR signal light is transmitted from an OTDR provided in the first terminal station to the second terminal station, in which the OTDR signal light is Raman amplified by using main signal light of the optical transmission system as pump light.Type: GrantFiled: March 12, 2004Date of Patent: May 8, 2007Assignees: Fujitsu Limited, Nippon Telegraph and Telephone CorporationInventors: Takayuki Maehara, Shinichirou Harasawa, Gentaro Funatsu, Hideki Maeda, Akira Naka
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Publication number: 20060150029Abstract: A storing unit includes a predetermined number of present value buffers that store the present value in time series, and a predetermined number of section-representative-value buffers that store a section representative value calculated based on the present value belonging to a predetermined section included in the monitoring period in time series. A storage control unit performs, when the present value is acquired, a control for storing data in the present value buffers and the section-representative-value buffers. A calculating unit calculates a period representative value of the monitoring period based on the present value and the section representative value stored in the storing unit.Type: ApplicationFiled: May 13, 2005Publication date: July 6, 2006Applicant: FUJITSU LIMITEDInventors: Motohisa Nakamura, Takayuki Maehara
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Publication number: 20050110980Abstract: In a method for performing OTDR measurement in an optical transmission system including a first terminal station and a second terminal station, OTDR signal light is transmitted from an OTDR provided in the first terminal station to the second terminal station, in which the OTDR signal light is Raman amplified by using main signal light of the optical transmission system as pump light.Type: ApplicationFiled: March 12, 2004Publication date: May 26, 2005Applicants: Fujitsu Limited, Nippon Telegraph and Telephone CorporationInventors: Takayuki Maehara, Shinichirou Harasawa, Gentaro Funatsu, Hideki Maeda, Akira Naka