Patents by Inventor Masayuki Yoshimura
Masayuki Yoshimura 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: 11859288Abstract: A corrosion-resistant member including: a metal base material (10); a corrosion-resistant coating (30) formed on the surface of the base material (10); and a buffer layer (20) formed between the base material (10) and the corrosion-resistant coating (30). The base material (10) contains a main element having the highest mass content ratio among elements contained in the base material (10) and a trace element having a mass content ratio of 1% by mass or less. The corrosion-resistant coating (30) contains at least one kind selected from magnesium fluoride, aluminum fluoride, and aluminum oxide. The buffer layer (20) contains an element of the same kind as the trace element, and the content ratio obtained by energy dispersive X-ray analysis of the element of the same kind as the trace element contained in the buffer layer (20) is 2% by mass or more and 99% by mass or less.Type: GrantFiled: September 3, 2020Date of Patent: January 2, 2024Assignee: Resonac CorporationInventors: So Miyaishi, Masahiro Okubo, Masayuki Yoshimura, Wataru Sakane, Teppei Tanaka, Saeko Nakamura, Saori Yamaki
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Publication number: 20230235183Abstract: There is provided a corrosion-resistant member in which a corrosion-resistant coating film is less likely to peel off from a base material even when the corrosion-resistant member is subjected to a thermal history. The corrosion-resistant member includes: a base material (10) containing aluminum or an aluminum alloy; and a corrosion-resistant coating film (20) formed on the surface of the base material (10), in which the corrosion-resistant coating film (20) contains aluminum fluoride hydroxide AlF3?x(OH)x in which a space group belongs to R-3c, and x in the chemical formula is 0.05 or more and 1.00 or less.Type: ApplicationFiled: June 21, 2021Publication date: July 27, 2023Applicant: SHOWA DENKO K.K.Inventors: So MIYAISHI, Masahiro OKUBO, Masayuki YOSHIMURA, Wataru SAKANE, Teppei TANAKA, Saeko NAKAMURA, Takuya IMAI, Tetsuo SAKURAI, Koyuki MESUDA
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Publication number: 20230188076Abstract: According to one embodiment, a motor drive apparatus includes a first inverter, a second inverter, and a controller. This controller rotationally moves, at the time of startup of a motor, a rotor of the motor to an initial position by DC excitation of supplying DC exciting currents from the first and second inverters to the phase windings of the motor and, after this rotational movement, PWM-controls switching of the first and second inverters in such a manner that a rotational speed of the rotor becomes a target rotational speed. Then, the controller carries out the DC excitation fey which a zero-axis current in each of the phase windings becomes approximately zero.Type: ApplicationFiled: February 3, 2023Publication date: June 15, 2023Inventors: Masaya Nogi, Masayuki Yoshimura
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Publication number: 20230020906Abstract: According to one embodiment, a motor drive unit includes a motor including a plurality of phase windings in a mutually unconnected state, a first inverter which controls application of electric power to one ends of the phase windings, a second inverter which controls application of electric power to the other ends of the phase windings, relays each of which includes a make break contact connected between the other ends of the phase windings, and a controller which switches, according to a value of a current flowing through the motor, between an open-windings mode and a star-connection mode.Type: ApplicationFiled: September 9, 2022Publication date: January 19, 2023Inventors: Masayuki Yoshimura, Masaya Nogi, Nariya Komazaki, Ken Miura
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Publication number: 20220251699Abstract: A corrosion-resistant member including: a metal base material (10); a corrosion-resistant coating (30) formed on the surface of the base material (10); and a buffer layer (20) formed between the base material (10) and the corrosion-resistant coating (30). The base material (10) contains a main element having the highest mass content ratio among elements contained in the base material (10) and a trace element having a mass content ratio of 1% by mass or less. The corrosion-resistant coating (30) contains at least one kind selected from magnesium fluoride, aluminum fluoride, and aluminum oxide. The buffer layer (20) contains an element of the same kind as the trace element, and the content ratio obtained by energy dispersive X-ray analysis of the element of the same kind as the trace element contained in the buffer layer (20) is 2% by mass or more and 99% by mass or less.Type: ApplicationFiled: September 3, 2020Publication date: August 11, 2022Applicant: SHOWA DENKO K.K.Inventors: So MIYAISHI, Masahiro OKUBO, Masayuki YOSHIMURA, Wataru SAKANE, Teppei TANAKA, Saeko NAKAMURA, Saori YAMAKI
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Publication number: 20220243072Abstract: A corrosion-resistant member including: a metal base material (10); and a corrosion-resistant coating (30) formed on the surface of the base material (10). The corrosion-resistant coating (30) is a stack of a magnesium fluoride layer (31) and an aluminum fluoride layer (32) in order from the base material (10) side. The aluminum fluoride layer (32) has a first crystalline region (32A) and a second crystalline region (32B) containing crystalline aluminum fluoride. The first crystalline region (32A) is a region in which diffraction spot arrays having regularity are observed in an electron beam diffraction image obtained by irradiation with electron beams having a beam diameter of 10 nm to 20 nm. The second crystalline region (32B) is a region in which a plurality of diffraction spots is observed but diffraction spot arrays having regularity are not observed in an electron beam diffraction image obtained by irradiation with the above-described electron beams.Type: ApplicationFiled: February 24, 2021Publication date: August 4, 2022Applicant: SHOWA DENKO K.K.Inventors: So MIYAISHI, Masahiro OKUBO, Masayuki YOSHIMURA, Wataru SAKANE, Teppei TANAKA, Saeko NAKAMURA, Saori YAMAKI
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Publication number: 20220195605Abstract: A corrosion-resistant member including: a metal base material (10); and a corrosion-resistant coating (30) formed on the surface of the base material (10). The corrosion-resistant coating (30) is a stack of a magnesium fluoride layer (31) and an aluminum fluoride layer (32) in order from the base material (10) side. The aluminum fluoride layer (32) is a stack of a first crystalline layer (32A) containing crystalline aluminum fluoride, an amorphous layer (32B) containing amorphous aluminum fluoride, and a second crystalline layer (32C) containing crystalline aluminum fluoride in order from the magnesium fluoride layer (31) side. The first crystalline layer (32A) and the second crystalline layer (32C) are layers in which diffraction spots are observed in electron beam diffraction images obtained by electron beam irradiation and the amorphous layer (32B) is a layer in which a halo pattern is observed in an electron beam diffraction image obtained by electron beam irradiation.Type: ApplicationFiled: September 3, 2020Publication date: June 23, 2022Applicant: SHOWA DENKO K.K.Inventors: So MIYAISHI, Masahiro OKUBO, Masayuki YOSHIMURA, Wataru SAKANE, Teppei TANAKA, Saeko NAKAMURA, Saori YAMAKI
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Patent number: 10211718Abstract: According to one embodiment, when an effective value of an input current flowing into a booster circuit rises to a value greater than or equal to a second set value, boosting of the booster circuit is started and, after the start, when the effective value lowers to a value lower than a first set value lower than the second set value, boosting of the booster circuit is stopped. Then, if the three-phase AC source is in an unbalanced state, the first set value is set to a value lower than usual.Type: GrantFiled: April 16, 2018Date of Patent: February 19, 2019Assignee: TOSHIBA CARRIER CORPORATIONInventors: Keiichi Ishida, Akihiro Ishigaya, Masayuki Yoshimura
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Patent number: 10205174Abstract: An electrode catalyst ink composition which includes metal oxide-based electrode catalyst particles, an electrolyte, and a mixed liquid medium, wherein the mixed liquid medium contains 40 to 85% by mass of water; 5 to 30% by mass of an aqueous solvent (A) that has an evaporation rate of 2.0 or lower when the evaporation rate of water at 25° C. is 1, and a solubility parameter (SP value) of not less than 9; and 10 to 30% by mass of a monoalcohol (B) that has an evaporation rate of higher than 2.0 when the evaporation rate of water at 25° C. is 1, and not more than 3 carbon atoms, provided that the total amount of the mixed liquid medium is 100% by mass.Type: GrantFiled: August 26, 2014Date of Patent: February 12, 2019Assignee: SHOWA DENKO K.K.Inventors: Tatsuya Fukuta, Takashi Sato, Masayuki Yoshimura, Yuji Ito
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Publication number: 20190016505Abstract: The invention provides a postal matter and the like enabling to reduce the burden of postage or delivery charge and printing cost for an advertisement client, and includes an address-described section which a postal address and an addresser-described portion; a first advertising information-described portion which a first advertising information of a first advertisement client; a second advertising information-described portion which a second advertising information or a second advertisement client; a first pre-addressed return mail on which a first response portion and a first pre-addressed return mail for responding to a first advertising information are provided; and a second pre-addressed return mail on which a second response portion and a second pre-addressed return mail for responding to a first advertising information are provided.Type: ApplicationFiled: September 13, 2018Publication date: January 17, 2019Inventor: Masayuki YOSHIMURA
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Publication number: 20180301972Abstract: According to one embodiment, when an effective value of an input current flowing into a booster circuit rises to a value greater than or equal to a second set value, boosting of the booster circuit is started and, after the start, when the effective value lowers to a value lower than a first set value lower than the second set value, boosting of the booster circuit is stopped. Then, if the three-phase AC source is in an unbalanced state, the first set value is set to a value lower than usual.Type: ApplicationFiled: April 16, 2018Publication date: October 18, 2018Applicant: Toshiba Carrier CorporationInventors: Keiichi Ishida, Akihiro Ishigaya, Masayuki Yoshimura
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Patent number: 9947936Abstract: The present invention concerns an oxygen reduction catalyst comprising composite particles in which primary particles of a titanium compound is dispersed into a carbon structure, wherein the composite particles have titanium, carbon, nitrogen and oxygen as constituent elements, and with regard to a ratio of number of atoms of each of the elements when titanium is taken as 1, a ratio of carbon is larger than 2 and 5 or less, a ratio of nitrogen is larger than 0 and 1 or less, and a ratio of oxygen is 1 or more and 3 or less, and an intensity ratio (D/G ratio) of D band peak intensity to G band peak intensity in a Raman spectrum is in the range of 0.4 to 1.0. The oxygen reduction catalyst according to the present invention has satisfactory initial performance and excellent start-stop durability.Type: GrantFiled: July 19, 2012Date of Patent: April 17, 2018Assignee: SHOWA DENKO K.K.Inventors: Noriyasu Tezuka, Masaki Horikita, Masayuki Yoshimura, Yuji Ito, Takashi Sato
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Publication number: 20170155157Abstract: An oxygen reduction catalyst, an ink including the catalyst, a catalyst layer including the catalyst, an electrode having the catalyst layer, a membrane electrode assembly having the catalyst layer, and a fuel cell having the membrane electrode assembly. The oxygen reduction catalyst includes titanium dioxide particles, a carbon material and a catalyst component, wherein a surface of the titanium dioxide particles is covered with zinc oxide, and the titanium dioxide particles and the carbon material each support the catalyst component.Type: ApplicationFiled: October 7, 2014Publication date: June 1, 2017Applicant: SHOWA DENKO K.K.Inventors: Noriyasu TEZUKA, Takuya IMAI, Masayuki YOSHIMURA, Masahiro OHMORI
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Patent number: 9660272Abstract: An oxygen reduction catalyst which includes composite particles including a portion including an inorganic metal compound and a portion containing carbon. The composite particles include a metal element M1, carbon, and oxygen as constituent elements; the amount of carbon atoms is 1 to 10 mol, and the amount of oxygen atoms is 1 to 3 mol, assuming that the total amount of atoms in the metal element M1 is 1 mol; a G-band and a D-band are present in a Raman spectrum, and a V/G ratio defined in an expression described below is 0.10 to 0.35: V/G ratio=(minimum value of spectral intensity in region V which is a region between G-band and D-band)/(peak intensity in G-band).Type: GrantFiled: July 8, 2014Date of Patent: May 23, 2017Assignee: SHOWA DENKO K.K.Inventors: Yuji Ito, Junya Sakaguchi, Takuya Imai, Ryuji Monden, Masayuki Yoshimura
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Publication number: 20170033367Abstract: An electrode catalyst ink composition which includes metal oxide-based electrode catalyst particles, an electrolyte, and a mixed liquid medium, wherein the mixed liquid medium contains 40 to 85% by mass of water; 5 to 30% by mass of an aqueous solvent (A) that has an evaporation rate of 2.0 or lower when the evaporation rate of water at 25° C. is 1, and a solubility parameter (SP value) of not less than 9; and 10 to 30% by mass of a monoalcohol (B) that has an evaporation rate of higher than 2.0 when the evaporation rate of water at 25° C. is 1, and not more than 3 carbon atoms, provided that the total amount of the mixed liquid medium is 100% by mass.Type: ApplicationFiled: August 26, 2014Publication date: February 2, 2017Applicant: SHOWA DENKO K.K.Inventors: Tatsuya FUKUTA, Takashi SATO, Masayuki YOSHIMURA, Yuji ITO
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Publication number: 20160149225Abstract: An oxygen reduction catalyst which includes composite particles including a portion including an inorganic metal compound and a portion containing carbon. The composite particles include a metal element M1, carbon, and oxygen as constituent elements; the amount of carbon atoms is 1 to 10 mol, and the amount of oxygen atoms is 1 to 3 mol, assuming that the total amount of atoms in the metal element M1 is 1 mol; a G-band and a D-band are present in a Raman spectrum, and a V/G ratio defined in an expression described below is 0.10 to 0.35: V/G ratio=(minimum value of spectral intensity in region V which is a region between G-band and D-band)/(peak intensity in G-band).Type: ApplicationFiled: July 8, 2014Publication date: May 26, 2016Applicant: SHOW DENKO K.K.Inventors: Yuji ITO, Junya SAKAGUCHI, Takuya IMAI, Ryuji MONDEN, Masayuki YOSHIMURA
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Publication number: 20150155569Abstract: Provided is a method for operating a fuel cell involving supplying an electrode with a low or non-humidified gas that achieves no significant decrease of voltage as compared with when a high-humidified feed gas is used. The method for operating a fuel cell having a membrane electrode assembly includes a cathode, an anode and an electrolyte membrane interposed between both the electrodes, wherein the cathode has a layer including an oxygen reducing catalyst including composite particles which include atoms of a metal element M1, carbon, nitrogen and oxygen and in which primary particles of a compound of the metal element M1 are dispersed in a carbon structure, which method includes supplying the cathode with an oxidizing agent gas which includes an oxygen gas and which has a relative humidity at a temperature of the membrane electrode assembly of 60% or less, and supplying the anode with a fuel gas.Type: ApplicationFiled: April 2, 2013Publication date: June 4, 2015Applicant: SHOWA DENKO K.K.Inventors: Noriyasu Tezuka, Masaki Horikita, Takuya Imai, Masayuki Yoshimura, Yuji Ito, Takashi Sato
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Publication number: 20140349212Abstract: The present invention concerns an oxygen reduction catalyst comprising composite particles in which primary particles of a titanium compound is dispersed into a carbon structure, wherein the composite particles have titanium, carbon, nitrogen and oxygen as constituent elements, and with regard to a ratio of number of atoms of each of the elements when titanium is taken as 1, a ratio of carbon is larger than 2 and 5 or less, a ratio of nitrogen is larger than 0 and 1 or less, and a ratio of oxygen is 1 or more and 3 or less, and an intensity ratio (D/G ratio) of D band peak intensity to G band peak intensity in a Raman spectrum is in the range of 0.4 to 1.0. The oxygen reduction catalyst according to the present invention has satisfactory initial performance and excellent start-stop durability.Type: ApplicationFiled: July 19, 2012Publication date: November 27, 2014Applicant: SHOWA DENKO K.K.Inventors: Noriyasu Tezuka, Masaki Horikita, Masayuki Yoshimura, Yuji Ito, Takashi Sato
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Patent number: 8742169Abstract: The present invention relates to a method for producing acrolein, comprising step (1) of subjecting glycerol to dehydration reaction in the presence of a copper compound and a compound containing a heteroatom; step (2) of recovering acrolein generated in the dehydration reaction step (1); step (3) of recovering part or all of the copper compound which remained after the recovery of acrolein; step (4) of treating part or all of the recovered copper compound with at least one member selected from a group consisting of an oxidizing agent and acid; and step (5) of returning part or all of the copper compound treated in the above step to step (1); and a method for producing acrylic acid, comprising reacting acrolein obtained by the above method with molecular oxygen.Type: GrantFiled: June 4, 2009Date of Patent: June 3, 2014Assignee: Showa Denko K.K.Inventors: Takanori Aoki, Masayuki Yoshimura
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Publication number: 20110087050Abstract: The present invention relates to a method for producing acrolein, comprising step (1) of subjecting glycerol to dehydration reaction in the presence of a copper compound and a compound containing a heteroatom; step (2) of recovering acrolein generated in the dehydration reaction step (1); step (3) of recovering part or all of the copper compound which remained after the recovery of acrolein; step (4) of treating part or all of the recovered copper compound with at least one member selected from a group consisting of an oxidizing agent and acid; and step (5) of returning part or all of the copper compound treated in the above step to step (1); and a method for producing acrylic acid, comprising reacting acrolein obtained by the above method with molecular oxygen.Type: ApplicationFiled: June 4, 2009Publication date: April 14, 2011Applicant: SHOWA DENKO K.K.Inventors: Takanori Aoki, Masayuki Yoshimura