Patents by Inventor Keishi Matsumoto
Keishi Matsumoto 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: 11879172Abstract: A method for producing a chemically treated alloy material is provided that suppresses a decrease in chemical treatability even in a case where chemical treatment is repeatedly performed. The method for producing a chemically treated alloy material of the present disclosure includes a chemical treatment step and a treatment solution regeneration step. In the chemical treatment step, an alloy material (6) is immersed in an oxalate treatment solution (4) containing oxalate ions and fluorine ions to perform a chemical treatment. In the treatment solution regeneration step, light is radiated to the oxalate treatment solution (4) during the chemical treatment and/or the oxalate treatment solution (4) after the chemical treatment.Type: GrantFiled: November 21, 2018Date of Patent: January 23, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Takamitsu Takagi, Makoto Miyajima, Keishi Matsumoto, Sayuri Iwata, Akira Tsuto
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Publication number: 20230312946Abstract: An oil-well metal pipe according to the present disclosure has a pipe main body including a first end portion and a second end portion. The pipe main body includes a pin formed at the first end portion, and a box formed at the second end portion. The pin includes a pin contact surface including an external thread part, and the box includes a box contact surface including an internal thread part. The oil-well metal pipe according to the present disclosure also includes a resin coating containing a resin, a solid lubricant powder, and copper phthalocyanine on or above at least one of the pin contact surface and the box contact surface.Type: ApplicationFiled: August 16, 2021Publication date: October 5, 2023Inventors: Tomoka ABE, Ken TOMIYASU, Keishi MATSUMOTO, Mamoru OCHIAI
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Publication number: 20210348247Abstract: A steel material for sliding members with improved seizure resistance is provided. A steel material for sliding members has a chemical composition including, in mass %, 0.05 to 5.0% In, and a microstructure with metal In particles or particles of oxides mainly composed of In dispersed therein, those ones of the metal In particles which have diameters of 50 nm to 5 ?m being in a number density not lower than 5000 particles/mm2 or those ones of the particles of oxides mainly composed of In which have diameters not smaller than 1 ?m being in a number density not lower than 30 particles/mm2.Type: ApplicationFiled: August 22, 2019Publication date: November 11, 2021Inventors: Kazuyuki KITAMURA, Makoto MIYAJIMA, Keishi MATSUMOTO
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Publication number: 20200283907Abstract: A method for producing a chemically treated alloy material is provided that suppresses a decrease in chemical treatability even in a case where chemical treatment is repeatedly performed. The method for producing a chemically treated alloy material of the present disclosure includes a chemical treatment step and a treatment solution regeneration step. In the chemical treatment step, an alloy material (6) is immersed in an oxalate treatment solution (4) containing oxalate ions and fluorine ions to perform a chemical treatment. In the treatment solution regeneration step, light is radiated to the oxalate treatment solution (4) during the chemical treatment and/or the oxalate treatment solution (4) after the chemical treatment.Type: ApplicationFiled: November 21, 2018Publication date: September 10, 2020Inventors: Takamitsu TAKAGI, Makoto MIYAJIMA, Keishi MATSUMOTO, Sayuri IWATA, Akira TSUTO
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Patent number: 10626345Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.Type: GrantFiled: November 2, 2015Date of Patent: April 21, 2020Assignees: NIPPON STEEL CORPORATION, VALLOUREC MANNESMANN OIL & GAS FRANCEInventors: Kunio Goto, Takayuki Kamimura, Masaru Takahashi, Keishi Matsumoto, Michihiko Iwamoto, Ryuichi Imai, Stephanie Rai
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Patent number: 9725671Abstract: A lubricant film-forming composition includes as a composition: 40 to 80 mass % of a base oil consisting of one or more selected from pentaerythritol fatty acid ester and trimethylolpropane fatty acid ester; 5 to 20 mass % of a solidifying agent consisting of paraffin wax; and 10 to 40 mass % of a solid lubricant consisting of one or more selected from alkali metal salt of hydroxystearic acid and alkali earth metal salt of hydroxystearic acid. A total content of the base oil, the solidifying agent, and the solid lubricant is 85 mass % or more and 100 mass % or less, and the lubricant film-forming composition does not contain heavy metals.Type: GrantFiled: September 2, 2014Date of Patent: August 8, 2017Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOUREC OIL AND GAS FRANCEInventors: Keishi Matsumoto, Kunio Goto, Masayoshi Sasaki
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Publication number: 20160230119Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.Type: ApplicationFiled: November 2, 2015Publication date: August 11, 2016Inventors: Kunio GOTO, Takayuki KAMIMURA, Masaru TAKAHASHI, Keishi MATSUMOTO, Michihiko IWAMOTO, Ryuichi IMAI, Stephanie RAI
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Publication number: 20160208194Abstract: A lubricant film-forming composition includes as a composition: 40 to 80 mass % of a base oil consisting of one or more selected from pentaerythritol fatty acid ester and trimethylolpropane fatty acid ester; 5 to 20 mass % of a solidifying agent consisting of paraffin wax; and 10 to 40 mass % of a solid lubricant consisting of one or more selected from alkali metal salt of hydroxystearic acid and alkali earth metal salt of hydroxystearic acid. A total content of the base oil, the solidifying agent, and the solid lubricant is 85 mass % or more and 100 mass % or less, and the lubricant film-forming composition does not contain heavy metals.Type: ApplicationFiled: September 2, 2014Publication date: July 21, 2016Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOUREC OIL AND GAS FRANCEInventors: Keishi MATSUMOTO, Kunio GOTO, Masayoshi SASAKI
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Patent number: 9321982Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.Type: GrantFiled: June 4, 2010Date of Patent: April 26, 2016Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOUREC MANNESMANN OIL & GAS FRANCEInventors: Kunio Goto, Takayuki Kamimura, Masaru Takahashi, Keishi Matsumoto, Michihiko Iwamoto, Ryuichi Imai, Stéphanie Raï
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Patent number: 9277600Abstract: A stator coil heating apparatus and a stator coil heating method that are capable of effectively preventing a core from thermal deformation particularly caused due to a magnetic flux generated by a coil head, without the problem of heating temperature variation, and also shortening a time for the process of heating a stator coil, are provided. A stator coil heating apparatus A to heat a stator coil L wound around a circular core F, comprises: induction heating coil heads 1 and 11 that heat the circular coil L by generating an inductive effect acting from outside in the thickness direction of the core F, against circular winding coil bases La and Lb that are sticking out of end faces Fa and Fb of the core F in the thickness direction thereof; and shields 2 and 12 that block a magnetic flux generated by the coil heads 1 and 11, out of the end faces Fa and Fb of the core F in the thickness direction thereof.Type: GrantFiled: June 20, 2013Date of Patent: March 1, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keishi Matsumoto, Hideaki Miyake, Hideaki Kimura, Satoshi Koide
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Publication number: 20150271615Abstract: An acoustic device includes a housing, a loudspeaker, a terminal provided for the housing, an identifying section that specifies an external unit mounted on the terminal, and a control section that determines a control content corresponding to the external unit identified by the identifying section and controls the loudspeaker according to the determined control content.Type: ApplicationFiled: November 8, 2013Publication date: September 24, 2015Inventors: Masaya Kano, Kenji Kawano, Susumu Kumazawa, Satoshi Yoshiizumi, Norimasa Hattori, Daigo Sugiura, Keishi Matsumoto
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Patent number: 9120136Abstract: In a drawing method of a metallic tube which includes: filling a high-pressure container with a lubricating oil, the container having a mother tube inserted thereinto; pressurizing the oil with a pressure booster; and drawing the forcedly lubricated mother tube, the oil having a kinetic viscosity of 100 to 2000 mm2/s at 40° C. and at normal pressure and a viscosity pressure coefficient of 15 to 24 GPa?1 at 40° C. is used for preventing seizing and vibrations in drawing and for suppressing the deterioration of surface roughness due to oil pits in tube. Herein, the oil preferably contains one or more of extreme-pressure (EP) additives in a total amount of 10 mass % or more, being selected from a sulfur-based additive, a chlorine-based additive, an organic calcium metallic salt, a phosphorus-based additive, an organic zinc-based additive, and an organic molybdenum-based additive, each having a prescribed amount of relevant element.Type: GrantFiled: June 7, 2011Date of Patent: September 1, 2015Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Masatoshi Toyoda, Keishi Matsumoto
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Patent number: 8846152Abstract: There is provided an antioxidant agent capable of preventing scale from being produced on the surface of a heated metallic starting material more effectively than the conventional antioxidant agent. The antioxidant agent according to the present invention contains a plurality of glass frits having different softening points and an inorganic compound having a melting point not higher than 600° C. The inorganic compound mainly softens in the low-temperature range of about 600° C. The plurality of glass frits mainly soften in the low-temperature range of about 600 to 1300° C. Therefore, the antioxidant agent covers the surface of metallic starting material in a broad temperature range, oxidizes the surface of metallic starting material, and prevents the production of scale.Type: GrantFiled: July 13, 2011Date of Patent: September 30, 2014Assignee: Nippon Steel & Sumitomo Metal CorporationInventors: Kazuhiro Shimoda, Tomio Yamakawa, Koji Muramatsu, Yuji Inoue, Junichi Nishimori, Yasuyoshi Hidaka, Keishi Matsumoto, Takahisa Kato, Shuichi Akiyama
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Patent number: 8815347Abstract: There is provided an antioxidant agent excellent in anti-dripping property and anti-peeling property. The antioxidant agent in accordance with the present invention contains a plurality of glass frits having different softening points, potter's clay, and bentonite and/or sepiolite. On account of the potter's clay, the antioxidant agent applied to the surface of a metallic starting material is less liable to drip down. Further, on account of the bentonite and/or sepiolite, the antioxidant agent is less liable to peel off the surface of the metallic starting material.Type: GrantFiled: July 13, 2011Date of Patent: August 26, 2014Assignee: Nippon Steel & Sumitomo Metal CorporationInventors: Kazuhiro Shimoda, Keishi Matsumoto, Yasuyoshi Hidaka, Tomio Yamakawa, Shuichi Akiyama, Takahisa Kato
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Publication number: 20140091084Abstract: A stator coil heating apparatus and a stator coil heating method that are capable of effectively preventing a core from thermal deformation particularly caused due to a magnetic flux generated by a coil head, without the problem of heating temperature variation, and also shortening a time for the process of heating a stator coil, are provided. A stator coil heating apparatus A to heat a stator coil L wound around a circular core F, comprises: induction heating coil heads 1 and 11 that heat the circular coil L by generating an inductive effect acting from outside in the thickness direction of the core F, against circular winding coil bases La and Lb that are sticking out of end faces Fa and Fb of the core F in the thickness direction thereof; and shields 2 and 12 that block a magnetic flux generated by the coil heads 1 and 11, out of the end faces Fa and Fb of the core F in the thickness direction thereof.Type: ApplicationFiled: June 20, 2013Publication date: April 3, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keishi Matsumoto, Hideaki Miyake, Hideaki Kimura, Satoshi Koide
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Patent number: 8671727Abstract: A blank tube for cold drawing is used for the production of a longer-length, small-diameter tube such as a heat-transfer tube for steam generation in nuclear power facilities, wherein the blank tube will not cause scoring and chattering vibration in a drawing process. The blank tube is used to produce a cold drawn tube through cold drawing of the blank tube. The average surface roughness Ra (ANSI B46.1) of the inner surface of blank tube before drawing satisfies the condition: 0.10 ?m?Ra?1.00 ?m in the case of a blank tube for cold drawing for use in an oil-lubricated drawing. In particular, the surface roughness Ra satisfies the condition: 0.10 ?m?Ra?0.50 ?m in the case of a blank tube for use in a high-pressure lubrication drawing and made of an austenitic alloy for use in a heat-transfer tube for a steam generator.Type: GrantFiled: June 20, 2012Date of Patent: March 18, 2014Assignee: Nippon Steel & Sumitomo Metal CorporationInventors: Masatoshi Toyoda, Keishi Matsumoto
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Patent number: 8586644Abstract: A thin and highly transparent coating having excellent air tightness, adhesion to a substrate, lubricating properties, galling resistance, and corrosion resistance is formed on the surface of a metal substrate and particularly on the surface of a threaded joint which is used for connection of oil country tubular goods. A photocurable composition comprising (A) a photocurable (meth)acrylate resin, (B) a (meth)acrylate monomer selected from a monofunctional (meth)acrylate monomer and a difunctional (meth)acrylate monomer, (C) a trifunctional or higher multifunctional (meth)acrylate monomer, (D) a photopolymerization initiator, (E) a benzotriazole anticorrosive agent, (F) an anticorrosive pigment selected from a phosphate anticorrosive pigment and calcium ion-exchanged silica, and (G) a phosphate ester is used to form a photocured coating.Type: GrantFiled: November 14, 2011Date of Patent: November 19, 2013Assignees: Nippon Steel & Sumitomo Metal Corporation, Vallourec Mannesmann Oil & Gas France, Chugoku Marine Paints, Ltd.Inventors: Tomomitsu Nagareo, Yoshinori Kameda, Keishi Matsumoto, Takayuki Kamimura, Masaru Takahashi, Kunio Goto, Ryuichi Imai
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Patent number: 8557750Abstract: A solid lubricating coating formed on a contact surface of a threaded joint for pipes has a matrix of a lubricating oil-containing polymer. The lubricating oil-containing polymer has either a uniform composition or a gradient composition in which the concentration of lubricating oil decreases towards the contact surface and in which there is substantially no lubricating oil in the vicinity of the contact surface.Type: GrantFiled: September 26, 2011Date of Patent: October 15, 2013Assignees: Nippon Steel & Sumitomo Metal Corporation, Vallourec Mannesmann Oil & Gas FranceInventors: Takao Kuranishi, Kunio Goto, Keishi Matsumoto
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Publication number: 20130202803Abstract: There is provided an antioxidant agent excellent in anti-dripping property and anti-peeling property. The antioxidant agent in accordance with the present invention contains a plurality of glass frits having different softening points, potter's clay, and bentonite and/or sepiolite. On account of the potter's clay, the antioxidant agent applied to the surface of a metallic starting material is less liable to drip down. Further, on account of the bentonite and/or sepiolite, the antioxidant agent is less liable to peel off the surface of the metallic starting material.Type: ApplicationFiled: July 13, 2011Publication date: August 8, 2013Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuhiro Shimoda, Keishi Matsumoto, Yasuyoshi Hidaka, Tomio Yamakawa, Shuichi Akiyama, Takahisa Kato
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Publication number: 20130115376Abstract: There is provided an antioxidant agent capable of preventing scale from being produced on the surface of a heated metallic starting material more effectively than the conventional antioxidant agent. The antioxidant agent according to the present invention contains a plurality of glass frits having different softening points and an inorganic compound having a melting point not higher than 600° C. The inorganic compound mainly softens in the low-temperature range of about 600° C. The plurality of glass frits mainly soften in the low-temperature range of about 600 to 1300° C. Therefore, the antioxidant agent covers the surface of metallic starting material in a broad temperature range, oxidizes the surface of metallic starting material, and prevents the production of scale.Type: ApplicationFiled: July 13, 2011Publication date: May 9, 2013Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Koji Muramatsu, Yuji Inoue, Junichi Nishimori, Yasuyoshi Hidaka, Keishi Matsumoto, Takahisa Kato, Shuichi Akiyama