Patents by Inventor Hitoshi Nakamura
Hitoshi Nakamura 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: 9666315Abstract: A spent nuclear fuel is reprocessed by dissolving a spent nuclear fuel in an aqueous nitric acid solution and separating and recovering nuclides contained in the resulting fuel solution by solvent extraction. A spent nuclear fuel reprocessing method includes: an electrolytic valence adjustment step in which nuclides contained in the fuel solution is electrolytically reduced without removing fission products or minor actinides until valence of plutonium is at a level at which solvent extraction efficiency is low by using the valence of plutonium contained in the fuel solution as a parameter; and a nuclide separation step in which, by using an extraction solvent which extracts uranium contained in the fuel solution, uranium is distributed from the fuel solution subjected to the electrolytic valence adjustment step to the extraction solvent.Type: GrantFiled: July 31, 2009Date of Patent: May 30, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Koji Mizuguchi, Reiko Fujita, Kouki Fuse, Hitoshi Nakamura, Kazuhiro Utsunomiya, Nobuhiko Tanaka
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Patent number: 9476737Abstract: The encoder includes a scale provided with multiple periodic patterns having mutually different periods, a sensor outputting, with a relative movement between the scale and the sensor, multiple periodic signals periodically changing respectively corresponding to the periods of the periodic patterns, and a signal processor calculating a detected movement amount as a detected relative movement amount between the scale and the sensor. The signal processor calculates, by using each of the periodic signals, an accumulated movement amount which is an accumulated value of the relative movement amount between the scale and the sensor in units of one over an integer of the period of the periodic pattern corresponding to the periodic signal used, unifies the units of the accumulated movement amounts calculated by using the respective periodic signals, and calculates the detected movement amount from the accumulated movement amounts with the unified units.Type: GrantFiled: November 25, 2014Date of Patent: October 25, 2016Assignee: CANON PRECISION, INC.Inventor: Hitoshi Nakamura
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Patent number: 9446353Abstract: An object of the present invention is to provide a catalyst for treating exhaust gas adapted not only to remove CO and VOCs based on unsaturated hydrocarbons such as C2H4 but also to accelerate a decomposition reaction of saturated hydrocarbons such as propane and to provide a method for producing such a catalyst for treating exhaust gas. The present invention provides a catalyst for treating an exhaust gas containing carbon monoxide and volatile organic compounds, the catalyst comprising a substrate containing a NOx removal catalyst component and a porous inorganic compound layer containing a noble metal, the layer being applied to the substrate.Type: GrantFiled: February 12, 2007Date of Patent: September 20, 2016Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Katsumi Nochi, Masanao Yonemura, Yoshiaki Obayashi, Hitoshi Nakamura, Toshio Koyanagi
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Publication number: 20160225473Abstract: According to an embodiment, a nuclear fuel material recovery method of recovering a nuclear fuel material containing thorium metal by reprocessing an oxide of a nuclear fuel material containing thorium oxide in a spent fuel is provided. The method has: a first electrolytic reduction step of electrolytically reducing thorium oxide in a first molten salt of alkaline-earth metal halide; a first reduction product washing step of washing a reduction product; and a main electrolytic separation step of separating the reduction product. The first molten salt further contains alkali metal halide, and contains at least one out of a group consisting of calcium chloride, magnesium chloride, calcium fluoride and magnesium fluoride. The method may further has a second electrolytic reduction step of electrolytically reducing uranium oxide, plutonium oxide, and minor actinoid oxide in a second molten salt of alkali metal halide.Type: ApplicationFiled: May 22, 2013Publication date: August 4, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Yuya TAKAHASHI, Koji Mizuguchi, Reiko Fujita, Hitoshi Nakamura, Shohei Kanamura, Naoki Kishimoto, Yoshikazu Matsubayashi, Takashi Oomori
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Patent number: 9353452Abstract: According to one embodiment, a method of separating and recovering metals whereby a mixture containing at least a first metal and a second metal, the second metal having a higher standard electrode potential than that of the first metal, is connected to an anode in a molten salt, and the first metal and the second metal are precipitated on a cathode in the molten salt by electrolysis, the method of separating and recovering metals comprising: a detection step of detecting a concentration change in each of a first metal ion and a second metal ion in the molten salt by a concentration change detection unit; a first electrolysis step of electrolyzing the first metal; a first recovery step of recovering a precipitated substance according to a detection in which a concentration decrease of the first metal ion, which is predefined in the concentration change detection unit, is detected in the detection step; a second electrolysis step of electrolyzing the second metal; and a second recovery step of recovering a preType: GrantFiled: July 3, 2014Date of Patent: May 31, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Yuya Takahashi, Hitoshi Nakamura, Shohei Kanamura, Akira Yamada, Koji Mizuguchi, Takashi Oomori
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Patent number: 9315915Abstract: An object of the present invention is to provide a method of producing metal zirconium, the method having a fewer steps and a smaller amount of secondary wastes generated, wherein the metal zirconium is obtained from a zirconium compound containing hafnium. A method of producing metal zirconium according to the present invention includes: a separation step of separating a hafnium oxychloride from a first substance containing a zirconium oxychloride and a hafnium oxychloride to obtain a second substance having a higher content of the zirconium oxychloride; a calcination step of calcining the second substance to obtain a third substance containing at least any of a zirconium oxychloride and a zirconium oxide; and a direct reduction step of holding the third substance in a molten salt with the third substance brought into contact with a cathode and applying a voltage between the cathode and an anode to directly reduce the third substance to obtain metal zirconium.Type: GrantFiled: June 29, 2009Date of Patent: April 19, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Reiko Fujita, Koji Mizuguchi, Hitoshi Nakamura, Kouki Fuse, Mitsuru Kawamoto, Masaru Ito
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Patent number: 9279703Abstract: The encoder includes a scale provided with a periodic pattern, a sensor relatively movable with respect to the scale and reading the periodic pattern to output analog signals each having a changing period corresponding to the periodic pattern and having mutually different phases, an A/D converter performing time-division analog-to-digital conversion on the analog signals output from the sensor to produce digital signals, and a phase detector detecting a phase from the digital signals. The encoder further includes a corrector calculating a correction value by using a relative movement speed of the scale and the sensor and the detected phase detected by the phase detector, and calculating a corrected phase from the correction value and the detected phase, and a position detector calculating a position in a direction in which the scale and the sensor are relativity moved by using the corrected phase.Type: GrantFiled: October 15, 2012Date of Patent: March 8, 2016Assignee: CANON KABUSHIKI KAISHAInventor: Hitoshi Nakamura
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Patent number: 9234772Abstract: The optical encoder includes a scale provided with a periodic pattern in which an optical portion is periodically formed with a first period in a first direction, and a light receiver movable relatively with the scale in the first direction and photoelectrically converts a detection light from a light source and then passing through the optical portions. The optical portion periodically has a pattern, which is formed by pattern portions mutually adjacent in a second direction orthogonal to the first direction and mutually shifted in the first direction, in the second direction with a second period of t. A width w of the light source in the second direction satisfies w=(a+b)/b·nt where n represents a natural number, and a:b represents a ratio of a distance from the light source to the periodic pattern and a distance from the periodic pattern to the light receiver.Type: GrantFiled: November 16, 2012Date of Patent: January 12, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Hitoshi Nakamura, Chihiro Nagura
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Patent number: 9195163Abstract: A developing device includes a developer bearer disposed facing a latent image bearer in a development range, and an alternating voltage application unit to apply alternating voltage to the developer bearer to generate an alternating electrical field in the development range to cause toner to move from the developer bearer to the latent image bearer while reciprocating therebetween. The alternating voltage has a frequency within a range from 20 kHz to 60 kHz and a peak-to-peak voltage equal to or greater than 300 V.Type: GrantFiled: February 26, 2014Date of Patent: November 24, 2015Assignee: Ricoh Company, Ltd.Inventors: Masaya Hamaguchi, Hitoshi Nakamura
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Patent number: 9136976Abstract: [Object] To prevent or reduce the degradation in transmission characteristics caused by fast fading (fluorescent lamp interference) to achieve optimized throughput. [Solution] A process for detecting fast fading (fluorescent lamp interference) is performed (ST2). Fast fading is detected by, for example, detecting a variable light source whose frequency is twice the frequency of an alternating current power supply. When fast fading is detected, a frame length update process is performed (ST3, ST4). In the case of “subject transmission” in which the subject apparatus is the transmitter of a data frame, the setting of the maximum number of aggregations in frame aggregation (A-MPDU, A-MSDU) is changed to “the recommended maximum number of aggregations”. “The recommended maximum number of aggregations” is set in advance so that the UDP throughput can be maximized under the conditions where fast fading has occurred.Type: GrantFiled: August 30, 2010Date of Patent: September 15, 2015Assignee: SONY CORPORATIONInventors: Hitoshi Nakamura, Hiroyuki Shigei, Haruhiko Yata, Takeshi Itagaki, Tomoya Yamaura, Katsunori Honma, Nobuaki Kawai, Hidekazu Kamimura
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Publication number: 20150228367Abstract: A corium processing method includes a dissolution step of feeding the corium into a first molten salt and dissolving uranium oxide and plutonium oxide contained in an oxide solid from the corium; a nuclear fuel recovery step of recovering the uranium oxide and the plutonium oxide from the first molten salt; a metal recovery step of feeding the corium into a second molten salt and separating and recovering metal Fe and metal Zr by molten salt electrolysis; and a solidification step of solidifying and recovering residues of the corium.Type: ApplicationFiled: October 11, 2013Publication date: August 13, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yuya Takahashi, Koji Mizuguchi, Hitoshi Nakamura, Shohei Kanamura, Reiko Fujita, Takashi Oomori, Akira Ikeda
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Patent number: 9103699Abstract: The encoder includes a scale having a first periodic pattern and a second periodic pattern, a sensor relatively movable with the scale. The sensor outputs in a first detection state a first periodic signal changing with a change period corresponding to the first periodic pattern and outputs in a second detection state a second periodic signal changing with a longer change period corresponding to the second periodic pattern than that of the first periodic signal. A processor calculates a position in a relative movement direction of the scale and sensor by using both the first and second periodic signals. The processor takes in the second periodic signal, the first periodic signal and the second periodic signal in this order at mutually different times, calculates phases of the second, first and second periodic signals at a specific time and calculates the position at the specific time by using the calculated phases.Type: GrantFiled: April 30, 2013Date of Patent: August 11, 2015Assignee: CANON KABUSHIKI KAISHAInventor: Hitoshi Nakamura
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Publication number: 20150198467Abstract: The encoder includes a scale provided with multiple periodic patterns having mutually different periods, a sensor outputting, with a relative movement between the scale and the sensor, multiple periodic signals periodically changing respectively corresponding to the periods of the periodic patterns, and a signal processor calculating a detected movement amount as a detected relative movement amount between the scale and the sensor. The signal processor calculates, by using each of the periodic signals, an accumulated movement amount which is an accumulated value of the relative movement amount between the scale and the sensor in units of one over an integer of the period of the periodic pattern corresponding to the periodic signal used, unifies the units of the accumulated movement amounts calculated by using the respective periodic signals, and calculates the detected movement amount from the accumulated movement amounts with the unified units.Type: ApplicationFiled: November 25, 2014Publication date: July 16, 2015Inventor: Hitoshi NAKAMURA
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Patent number: 9029758Abstract: The encoder includes a scale provided with first and second tracks, a sensor relatively movable with the scale and reading periodic patterns to output periodic signals, and a processor calculating a position in a relative movement direction of the scale and sensor by using the periodic signals. The first track includes first and second periodic patterns whose periods are mutually different, and the second track includes a third periodic pattern whose period is different from that of the second pattern and is an integral multiple or an integral fraction of that of the first periodic pattern. The processor calculates, by using a phase difference between the periodic signals corresponding to the first and third periodic patterns, the position in which a sensor reading error due to a relative displacement between the first and second tracks and the sensor is corrected.Type: GrantFiled: May 1, 2013Date of Patent: May 12, 2015Assignee: Canon Kabushiki KaishaInventor: Hitoshi Nakamura
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Publication number: 20150097805Abstract: To detect a position on a screen with which even a thin nib is in contact, and improve operativity, visibility at the time of operation, and a feeling of use. A touch screen film 5 includes at least a transparent, conductive, thin film 7 which has a predetermined surface resistivity set to be within a range from 105.0 to 108.0 ?/sq; when a pointing means 30 comes into contact with the film, a change in capacitance per unit area of 0.36 to 6.00 pF/mm2 occurs in a dielectric material 4 between a predetermined area including the contact position and the sensor electrode.Type: ApplicationFiled: April 17, 2013Publication date: April 9, 2015Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Shigenobu Mine, Akihito Mitsui, Masashi Sakagami, Hitoshi Nakamura, Seiichi Takigawa
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Patent number: 9000356Abstract: An encoder (10) includes a sensor (1) configured to illuminate light on a single scale (100) to detect two phase signals having periods different from each other, an error signal generator (2) configured to arrange accumulated amounts of phase changes of the two phase signals when the scale (100) and the sensor (1) are relatively displaced from each other by a predetermined displacement so as to obtain two accumulated phase signals and to obtain a difference between the two accumulated phase signals so as to generate an error signal that is obtained by removing an accumulated phase component corresponding to the predetermined displacement, and an interpolation error detector (3) configured to average the error signal by using at least one of periods of the two phase signals so as to detect an interpolation error contained in at least one of the two phase signals.Type: GrantFiled: December 17, 2012Date of Patent: April 7, 2015Assignee: Canon Kabushiki KaishaInventor: Hitoshi Nakamura
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Patent number: 8993955Abstract: The encoder includes a scale including first and second periodic patterns, and a detector relatively movable with respect to the scale and whose detection state is switchable between a first detection state to read the first periodic pattern and output a first signal and a second detection state to read the second periodic pattern and output a second signal. A processor performs a first process to detect a first absolute position by using the first and second signals and then performs a second process to calculate a relative movement amount by using a specific signal that is one of the first and second signals and detect a second absolute position by using the relative movement amount and the first absolute position. The specific signal is obtained from the detector set in a same detection state as that set last in the first process.Type: GrantFiled: October 12, 2012Date of Patent: March 31, 2015Assignee: Canon Kabushiki KaishaInventors: Hitoshi Nakamura, Chihiro Nagura
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Patent number: 8966533Abstract: Disclosed herein is a receiving apparatus including: an extracting part configured to extract signature data representing a feature of reproduced content from the content; a profile generating part configured to generate user profile data; a query generating part configured to generate a query containing the signature data and the user profile data, transmit the query thus generated to a transmitting apparatus, and receive a response that is sent back from the transmitting apparatus in accordance with the query and that has been caused to match with the user profile data in the transmitting apparatus; and an application executing part configured to acquire and execute an application in conjunction with reproduction of the content based on the response thus received.Type: GrantFiled: July 10, 2013Date of Patent: February 24, 2015Assignee: Sony CorporationInventors: Yasuaki Yamagishi, Hitoshi Nakamura
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Publication number: 20150008136Abstract: According to one embodiment, a method of separating and recovering metals whereby a mixture containing at least a first metal and a second metal, the second metal having a higher standard electrode potential than that of the first metal, is connected to an anode in a molten salt, and the first metal and the second metal are precipitated on a cathode in the molten salt by electrolysis, the method of separating and recovering metals comprising: a detection step of detecting a concentration change in each of a first metal ion and a second metal ion in the molten salt by a concentration change detection unit; a first electrolysis step of electrolyzing the first metal; a first recovery step of recovering a precipitated substance according to a detection in which a concentration decrease of the first metal ion, which is predefined in the concentration change detection unit, is detected in the detection step; a second electrolysis step of electrolyzing the second metal; and a second recovery step of recovering a preType: ApplicationFiled: July 3, 2014Publication date: January 8, 2015Applicant: Kabushiki Kaisha ToshibaInventors: Yuya TAKAHASHI, Hitoshi Nakamura, Shohei Kanamura, Akira Yamada, Koji Mizuguchi, Takashi Oomori
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Publication number: 20140277730Abstract: A position detection apparatus (100) includes a scale (10) including a pattern circumferentially and periodically formed on a circle whose center is a predetermined point, a sensor unit (20) relatively movable with respect to the scale (10), and a signal processor (40) which processes an output signal of the sensor unit (20) to obtain position information of an object, and the sensor unit (20) includes a first detector (21) and a second detector (22), and the signal processor (40) reduces an error component contained in the position information due to a difference between a rotation center of the scale (10) and the predetermined point based on a first detection signal outputted from the first detector (21) and on a second detection signal outputted from the second detector (22).Type: ApplicationFiled: March 13, 2014Publication date: September 18, 2014Applicant: CANON KABUSHIKI KAISHAInventor: Hitoshi Nakamura