Patents by Inventor Takeshi Akasaka
Takeshi Akasaka 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: 8940937Abstract: Disclosed is a novel method for the selective molecular conversion of raw material carbon nanotubes containing a mixture of metallic carbon nanotubes and semiconductive carbon nanotubes in a manner that is based on the electrical properties or diameter of the carbon nanotubes. The present invention causes a photoreaction of raw material carbon nanotubes containing a mixture of metallic carbon nanotubes and semiconductive carbon nanotubes with a disulfide or a sulfide of the following formula (I) or (II) (wherein R1 and R2 each independently represent a hydrocarbon group that may have a substituent) in an organic solvent that contains the raw material carbon nanotubes and the disulfide of the formula (I) or the sulfide of the formula (II), so as to selectively functionalize the metallic carbon nanotubes, or functionalize the carbon nanotubes diameter selectively.Type: GrantFiled: January 28, 2011Date of Patent: January 27, 2015Assignee: Japan Science and Technology AgencyInventors: Yutaka Maeda, Takeshi Akasaka
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Patent number: 8497392Abstract: A process for producing functionalized carbon nanotubes, which can organically modify carbon nanotubes with high efficiency, and in particular, can introduce different organic groups into carbon nanotubes with high efficiency through a series of chemical reactions, is provided. Carbon nanotubes are allowed to react with at least one reagent selected from a silyl-substituted organometallic compound and an organometallic compound to obtain a functionalized carbon nanotube reductant, and this functionalized carbon nanotube reductant is then allowed to react with at least one reagent selected from a silyl halide compound and an organohalogen compound to obtain functionalized carbon nanotubes.Type: GrantFiled: March 11, 2010Date of Patent: July 30, 2013Assignee: Japan Science and Technology AgencyInventors: Yutaka Maeda, Takeshi Akasaka
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Patent number: 8425873Abstract: Provided are a transparent electroconductive thin film of single-walled carbon nanotubes and its production method capable of further enhancing the electroconductivity and the light transmittance of the film and capable of simplifying the thin film formation process. The method comprises: dispersing single-walled carbon nanotubes of mixed metallic single-walled carbon nanotubes (m-SWNTs) and semiconductor single-walled carbon nanotubes (s-SWNTs) in an amine solution containing an amine having a boiling point of from 20 to 400° C. as a dispersant; centrifuging or filtering the resulting dispersion to concentrate m-SWNTs, thereby giving a dispersion rich in m-SWNTs; and applying the resulting dispersion rich in m-SWNTs onto a substrate to form a thin film thereon.Type: GrantFiled: July 10, 2008Date of Patent: April 23, 2013Assignee: Japan Science and Technology AgencyInventors: Yutaka Maeda, Takeshi Akasaka
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Publication number: 20130030217Abstract: Disclosed is a novel method for the selective molecular conversion of raw material carbon nanotubes containing a mixture of metallic carbon nanotubes and semiconductive carbon nanotubes in a manner that is based on the electrical properties or diameter of the carbon nanotubes. The present invention causes a photoreaction of raw material carbon nanotubes containing a mixture of metallic carbon nanotubes and semiconductive carbon nanotubes with a disulfide or a sulfide of the following formula (I) or (II) (wherein R1 and R2 each independently represent a hydrocarbon group that may have a substituent) in an organic solvent that contains the raw material carbon nanotubes and the disulfide of the formula (I) or the sulfide of the formula (II), so as to selectively functionalize the metallic carbon nanotubes, or functionalize the carbon nanotubes diameter selectively.Type: ApplicationFiled: January 28, 2011Publication date: January 31, 2013Inventors: Yutaka Maeda, Takeshi Akasaka
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Publication number: 20120053358Abstract: A process for producing functionalized carbon nanotubes, which can organically modify carbon nanotubes with high efficiency, and in particular, can introduce different organic groups into carbon nanotubes with high efficiency through a series of chemical reactions, is provided. Carbon nanotubes are allowed to react with at least one reagent selected from a silyl-substituted organometallic compound and an organometallic compound to obtain a functionalized carbon nanotube reductant, and this functionalized carbon nanotube reductant is then allowed to react with at least one reagent selected from a silyl halide compound and an organohalogen compound to obtain functionalized carbon nanotubes.Type: ApplicationFiled: March 11, 2010Publication date: March 1, 2012Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Yutaka Maeda, Takeshi Akasaka
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Patent number: 7980510Abstract: A small unmanned airplane includes; a main wing having a camber airfoil whose under surface is approximately flat, narrowing in the shape of taper to a blade tip, leading edge of which holds sweepback angle, of flying wing type which has an aerodynamic surface of tailless wing type and is low aspect ratio; movable flaps extending approximately extreme breadth in trailing edge part of both left and right sides of the main wing, having a dihedral angle at least in level flight; vertical stabilizers placed at blade tips of left and right of the main wing; and two propellers installed on the top surface of the main wing. This can materialize miniaturization and weight saving of a small unmanned airplane for individual carrying capability and for suitability for such as lift-off by hand throw.Type: GrantFiled: May 12, 2004Date of Patent: July 19, 2011Assignee: Kawada Industries, Inc.Inventors: Yasutada Tanabe, Chiharu Totsuka, Takeshi Akasaka, Masato Okamoto
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Patent number: 7884300Abstract: A method of realizing selective separation of metallic single-walled carbon nanotubes and semiconducting carbon nanotubes from bundled carbon nanotubes; and obtaining of metallic single-walled carbon nanotubes separated at high purity through the above method. Metallic single-walled carbon nanotubes are dispersed one by one from bundled carbon nanotubes not only by the use of a difference in interaction with amine between metallic single-walled carbon nanotubes and semiconducting carbon nanotubes due to a difference in electrical properties between metallic single-walled carbon nanotubes and semiconducting carbon nanotubes but also by the use of the fact that an amine is an important factor in SWNTs separation. The thus dispersed carbon nanotubes are subjected to centrifugation, thereby attaining separation from non-dispersed semiconducting carbon nanotubes.Type: GrantFiled: July 29, 2005Date of Patent: February 8, 2011Assignee: University of TsukubaInventors: Takeshi Akasaka, Takatsugu Wakahara, Yutaka Maeda
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Publication number: 20100221172Abstract: Provided are a transparent electroconductive thin film of single-walled carbon nanotubes and its production method capable of further enhancing the electroconductivity and the light transmittance of the film and capable of simplifying the thin film formation process. The method comprises: dispersing single-walled carbon nanotubes of mixed metallic single-walled carbon nanotubes (m-SWNTs) and semiconductor single-walled carbon nanotubes (s-SWNTs) in an amine solution containing an amine having a boiling point of from 20 to 400° C. as a dispersant; centrifuging or filtering the resulting dispersion to concentrate m-SWNTs, thereby giving a dispersion rich in m-SWNTs; and applying the resulting dispersion rich in m-SWNTs onto a substrate to form a thin film thereon.Type: ApplicationFiled: July 10, 2008Publication date: September 2, 2010Inventors: Yutaka Maeda, Takeshi Akasaka
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Patent number: 7757991Abstract: In a blade vortex interaction (BVI) noise reduction system for a helicopter a rotor blade, a tab is movable via an actuator from a first position, wherein the tab is within the blade, to a second position, wherein the tab extends outwardly from a trailing edge of the rotor blade. The actuator is operated so that the tab advances and retreats in response to rotating timing of the rotor blade, to reduce the BVI noise of the rotor blade.Type: GrantFiled: February 28, 2006Date of Patent: July 20, 2010Assignees: Kawada Industries, Inc., Japan Aerospace Exploration AgencyInventors: Yasutada Tanabe, Takeshi Akasaka, Shigeru Saito, Noboru Kobiki
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Publication number: 20100044505Abstract: The present method is characterized by providing the rotor blade with a tab 3, which can advance and retreat with respect to rear of rotating direction of the rotor blade between a position where the tab protrudes from a trailing edge of the rotor blade and a position where the tab does not, and providing an actuator 4, which advances and retreats the tab 3, and operating the actuator 4 so that the tab advances and retreats in response to rotating timing of the rotor blade 2, when reducing the BVI noise of the rotor blade of a helicopter. Thus, the BVI noise of a helicopter can be reduced effectively.Type: ApplicationFiled: February 28, 2006Publication date: February 25, 2010Inventors: Yasutada Tanabe, Takeshi Akasaka, Shigeru Saito, Noboru Kobiki
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Publication number: 20080308772Abstract: A method of realizing selective separation of metallic single-walled carbon nanotubes and semiconducting carbon nanotubes from bundled carbon nanotubes; and obtaining of metallic single-walled carbon nanotubes separated at high purity through the above method. Metallic single-walled carbon nanotubes are dispersed one by one from bundled carbon nanotubes not only by the use of a difference in interaction with amine between metallic single-walled carbon nanotubes and semiconducting carbon nanotubes due to a difference in electrical properties between metallic single-walled carbon nanotubes and semiconducting carbon nanotubes but also by the use of the fact that an amine is an important factor in SWNTs separation. The thus dispersed carbon nanotubes are subjected to centrifugation, thereby attaining separation from non-dispersed semiconducting carbon nanotubes.Type: ApplicationFiled: July 29, 2005Publication date: December 18, 2008Inventors: Takeshi Akasaka, Takatsugu Wakahara, Yutaka Maeda
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Publication number: 20080237395Abstract: The present method is characterized by providing the rotor blade with a tab 3, which can advance and retreat with respect to rear of rotating direction of the rotor blade between a position where the tab protrudes from a trailing edge of the rotor blade and a position where the tab does not, and providing an actuator 4, which advances and retreats the tab 3, and operating the actuator 4 so that the tab advances and retreats in response to rotating timing of the rotor blade 2, when reducing the BVI noise of the rotor blade of a helicopter. Thus, the BVI noise of a helicopter can be reduced effectively.Type: ApplicationFiled: February 28, 2006Publication date: October 2, 2008Inventors: Yasutada Tanabe, Takeshi Akasaka, Shigeru Saito, Noboru Kobiki
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Publication number: 20070063096Abstract: A small unmanned airplane includes; a main wing having a camber airfoil whose under surface is approximately flat, narrowing in the shape of taper to a blade tip, leading edge of which holds sweepback angle, of flying wing type which has an aerodynamic surface of tailless wing type and is low aspect ratio; movable flaps extending approximately extreme breadth in trailing edge part of both left and right sides of the main wing, having a dihedral angle at least in level flight; vertical stabilizers placed at blade tips of left and right of the main wing; and two propellers installed on the top surface of the main wing. This can materialize miniaturization and weight saving of a small unmanned airplane for individual carrying capability and for suitability for such as lift-off by hand throw.Type: ApplicationFiled: May 12, 2004Publication date: March 22, 2007Inventors: Yasutada Tanabe, Chiharu Totsuka, Takeshi Akasaka, Masato Okamoto
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Publication number: 20060172156Abstract: A magnetic recording medium includes a non-magnetic supporter; a lower non-magnetic layer containing at least inorganic particles and a binder resin; and a magnetic layer containing at least a magnetic powder and a binder resin and having a thickness of 100 nm or less, the lower non-magnetic layer and the magnetic layer being laminated on a main surface of the non-magnetic supporter, wherein the magnetic layer is formed by a process including applying a paint for forming the lower non-magnetic layer; drying the applied paint; and applying a magnetic paint while the lower non-magnetic layer is kept in a film state after drying.Type: ApplicationFiled: January 19, 2006Publication date: August 3, 2006Inventors: Katsunori Maeshima, Masaru Terakawa, Noboru Sekiguchi, Takeshi Akasaka, Yuichi Masuzawa
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Patent number: 7005156Abstract: There is provided a process for producing tofu wherein a delayed action coagulant is dispersed in heated soybean milk in a static inline mixer provided with a narrowed part and then a thickening raw material is added thereto in an inline mixer provided with a dividing element to thereby continuously and efficiently produced a nigari-tofu product being in a good state and having favorable taste.Type: GrantFiled: August 31, 2001Date of Patent: February 28, 2006Assignee: Fuji Oil Company, LimitedInventors: Tomohiko Adachi, Shin Nakatani, Takeshi Akasaka, Makoto Sakamoto
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Publication number: 20040222323Abstract: A nozzle device forms a treatment film with a uniform thickness on a substrate with a small amount of treatment liquid and a substrate treatment device. A nozzle device 10 includes a plurality of discharge ports 18 formed on the bottom, a liquid retaining chamber 22 for retaining supplied treatment liquid, and a liquid discharge paths 23 and 17 that communicate with each discharge port 18 on one end and communicate with the retaining chamber 22 on the other end. The paths allow the treatment liquid retained in the liquid retaining chamber 22 to flow to the discharge ports 18 where the liquid is discharged. The discharge ports 18 are arranged in double rows along a longitudinal direction of the nozzle device 10. The discharge ports of one row is staggered with respect to the discharge ports of the other row so that the discharge ports 18 form a staggered pattern in the arranged direction.Type: ApplicationFiled: June 3, 2004Publication date: November 11, 2004Applicant: Sumitomo Precision Products Co., Ltd.Inventors: Takeshi Akasaka, Shigeru Mizukawa, Takashi Murata, Katsutoshi Nakata, Shunji Matsumoto
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Publication number: 20040028798Abstract: A method of efficiently producing foods being free from deformations such as net meshes that would occur when soft hydrous foods are frozen, and having a minimum of cracking to be produced by ice crystal forming. A method of producing soft hydrous foods, wherein soft hydrous foods, upon freezing, are carried to a smooth-flat-surface support, if necessary, by means of a conveyor fitted with crosspieces having upwardly curved surfaces at intervals relative to the conveying surface thereof; they are frozen on the support; and, after starting freezing, they are rolled or transferred onto a different support for further freezing.Type: ApplicationFiled: January 28, 2003Publication date: February 12, 2004Inventors: Tomohiko Adachi, Shin Nakatani, Takeshi Akasaka, Makoto Sakamoto, Satoru Fukushima
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Publication number: 20030134031Abstract: There is provided a process for producing tofu wherein a delayed action coagulant is dispersed in heated soybean milk in a static inline mixer provided with a narrowed part and then a thickening raw material is added thereto in an inline mixer provided with a dividing element to thereby continuously and efficiently produced a nigari-tofu product being in a good state and having favorable taste.Type: ApplicationFiled: January 22, 2003Publication date: July 17, 2003Inventors: Tomohiko Adachi, Shin Nakatani, Takeshi Akasaka, Makoto Sakamoto
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Patent number: 6342256Abstract: A process for industrially producing tofu products which are excellent in taste and freeze resistance. This process involves concentrating soybean milk extracted from uncooked soybean slurry or puree; adding one or more members selected from sugars, starch and transglutaminase to the concentrated soybean milk at an elevated temperature; adding a solidifying agent to prepare tofu; further heating the tofu in two steps; and then freezing.Type: GrantFiled: February 21, 2001Date of Patent: January 29, 2002Assignee: Fuji Oil Company, LimitedInventors: Hiroki Oomura, Tomohiko Adachi, Shin Nakatani, Takeshi Akasaka
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Patent number: 5869626Abstract: A novel metal-encapsulated fullerene compound wherein a side chain is introduced in a metal-encapsulated fullerene is provided.A metal-encapsulated fullerene compound represented by the following structural formula (1) is synthesized by causing a disilirane derivative or digermirane derivative having the following structural formula (2) to react with a metal-encapsulation fullerene so as to add functional groups to the fullerene. ##STR1## Herein, M is an encapsulated metal atom, m is an integer from 1 to 3, n is an even number from 28 to 200, and R is a t-butyl group or an aromatic group having alkyl groups in the 2,6-positions, such as mesityl, 2,6-diethylphenyl or 2,6-dimethylphenyl groups.Type: GrantFiled: February 26, 1996Date of Patent: February 9, 1999Assignee: Doryokuro Kakunenryo Kaihatsu JigyodanInventors: Kazunori Yamamoto, Hideyuki Funasaka, Takeshi Takahashi, Takeshi Akasaka, Tatsuhisa Kato, Shigeru Nagase, Kaoru Kobayashi