Patents by Inventor Takehiro Takahashi
Takehiro Takahashi 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: 12116688Abstract: A Ni-plated steel sheet includes a base steel sheet and a Ni-based coating layer that is disposed on a surface of the base steel sheet. The distribution of carbon concentration in a depth direction obtained by performing GDS analysis on the Ni-plated steel sheet has a peak indicating the carbon concentration that is equal to or more than twice the carbon concentration of a thickness middle portion of the base steel sheet in the vicinity of an interface between the base steel sheet and the Ni-based coating layer.Type: GrantFiled: December 20, 2019Date of Patent: October 15, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Yasuto Goto, Kiyokazu Ishizuka, Takehiro Takahashi
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Publication number: 20240326381Abstract: To obtain a welded member using a steel sheet less expensive than a pure Ni sheet as a raw material and excellent in corrosion resistance. A welded member according to the present invention is made by connecting a Ni plated steel sheet having a Ni plating layer and a Fe—Ni diffusion alloy layer and another steel sheet via a welded part, wherein: a Ni concentration is 70 mass % or more and a Fe concentration is 30 mass % or less in a surface layer of each of a toe, a toe near area, and the welded part; and a thickness of the Fe—Ni diffusion alloy layer is 0.5 to 1.5 ?m and a total thickness of the Ni plating layer and the Fe—Ni diffusion alloy layer is 2.7 to 14.0 ?m at a non-welded part, and a total concentration of S and C in the Ni plating layer at the non-welded part is less than 20 ppm.Type: ApplicationFiled: November 11, 2022Publication date: October 3, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Misaki ASADA, Hiroki FUJIMOTO, Takehiro TAKAHASHI
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Publication number: 20240316955Abstract: An ink jet recording apparatus includes first and second belts stretched by a plurality of rollers, including first, second and third rollers, and forming a nip, a heater disposed inside the first belt. The first roller is disposed upstreammost among the plurality of rollers in a conveyance direction, the second roller is disposed downstream of an irradiation area of the first belt heated by the heater and the third roller is disposed between from the second roller to the first roller in a rotational direction of the first belt. A first temperature sensor detects a temperature of the irradiation area in an inner circumferential surface. A second temperature sensor detects a temperature of the first belt between from the second roller to the third roller in the rotational direction.Type: ApplicationFiled: March 12, 2024Publication date: September 26, 2024Inventors: TAKEHIRO ITO, YOSUKE OBAYASHI, KAZUMI SATO, MASANOBU TANAKA, NAOKI AKIYAMA, SHINSUKE TAKAHASHI, MASAYUKI TAMAKI
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Patent number: 12094746Abstract: There is provided a semiconductor manufacturing apparatus including: a stage including a shaft provided to a surface opposite a mounting surface on which a substrate is mounted, and configured to be rotated by a driving force of a motor using the shaft as a rotation axis; a storage part storing a correction information on a rotational angle of the stage for each number of rotations in a plurality of rotations of the stage, the plurality of rotations corresponding to a cycle; and a rotation control part configured to control the motor based on the correction information and control the rotation of the stage.Type: GrantFiled: January 31, 2020Date of Patent: September 17, 2024Assignee: TOKYO ELECTRON LIMITEDInventors: Ryotaro Takahashi, Takehiro Shindo
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Patent number: 12071691Abstract: A plated steel sheet for automobile structural members has a steel sheet, a plating layer formed on at least a part of a surface of the steel sheet, and an oxide layer formed on at least a part of a surface of the plating layer, the plating layer has a predetermined chemical composition, and when measurement by XPS is performed at a position 5.0 nm below a surface of the oxide layer in a thickness direction, IMg/IMgOx, which is the ratio of a maximum detected intensity of Mg to a maximum detected intensity of an oxide or hydroxide of Mg, is 0.00 or greater and 1.20 or less.Type: GrantFiled: December 24, 2021Date of Patent: August 27, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Takuya Mitsunobu, Takehiro Takahashi, Hiroshi Takebayashi
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Publication number: 20240240278Abstract: A steel sheet comprising, by mass %, C: 0.05 to 0.40%, Si: 0.2 to 3.0%, and Mn: 0.1 to 5.0%, wherein a surface layer of the steel sheet contains granular oxides, an average grain size of the granular oxides is 300 nm or less, a number density of granular oxides is 4.0/?m2 or more, the steel sheet comprises an Si—Mn depleted layer having a thickness of 3.0 ?m or more from the surface of the steel sheet, and Si and Mn contents of the Si—Mn depleted layer not containing oxides at the ½ position of the thickness are respectively less than 10% of the Si and Mn contents at the sheet thickness center part of the steel sheet, and a plated steel sheet using the same are provided.Type: ApplicationFiled: April 27, 2021Publication date: July 18, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Takuya MITSUNOBU, Keitaro MATSUDA, Jun MAKI, Takehiro TAKAHASHI, Hiroshi TAKEBAYASHI
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Publication number: 20240227354Abstract: A steel welded member comprising a plurality of Zn-based plated steel materials, each having a Zn-based plating layer on a surface of a steel material, joined together through at least one spot weld, wherein the steel material contains, by mass %, C: 0.05 to 0.40%, Si: 0.2 to 3.0%, and Mn: 0.1 to 5.0%, the steel welded member includes, by area ratio, 20 to 80% of a ? phase (Fe3 Zn1 0) and at least one oxide with a long axis of 0.5 ?m or more in a region up to 0.5 mm from an end part of a pressure weld of the spot weld.Type: ApplicationFiled: April 27, 2021Publication date: July 11, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Takuya MITSUNOBU, Keitaro MATSUDA, Jun MAKI, Takehiro TAKAHASHI, Hiroshi TAKEBAYASHI
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Patent number: 12031201Abstract: The present invention relates to a plated steel sheet for hot stamping comprising a steel sheet and a Zn—Ni plating layer formed on at least one surface of the steel sheet, wherein the Zn—Ni plating layer has an Ni concentration of 8 mass % or more, a plating deposition amount of 10 g/m2 or more and 90 g/m2 or less per surface, and an average grain size of 50 nm or more, and a difference between a diffraction peak of the Zn—Ni plating layer after heat treating the plated steel sheet for hot stamping at 200° C. for 1 hour, and a diffraction peak of the Zn—Ni plating layer before heat treating it, is 0.3° or less.Type: GrantFiled: May 29, 2020Date of Patent: July 9, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Takehiro Takahashi, Daisuke Maeda, Hiroshi Takebayashi
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Patent number: 12031225Abstract: A Ni diffusion-plated steel sheet of the present invention includes a base steel sheet and a Fe—Ni diffusion alloy-plating layer positioned on at least one surface of the base steel sheet, an Ni coating weight of the Fe—Ni diffusion alloy-plating layer is 9.0 to 20 g/m2, a Fe concentration Cs of an outermost layer of the Fe—Ni diffusion alloy-plating layer is 10 to 55 mass %, the base steel sheet has a predetermined chemical composition, and a ferrite grain size number specified by JIS G 0551 (2013) of the base steel sheet is 11.0 or more.Type: GrantFiled: April 12, 2019Date of Patent: July 9, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Takehiro Takahashi, Kiyokazu Ishizuka, Yasuto Goto
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Patent number: 12021249Abstract: A novel battery container that can be obtained by welding plated steel sheets, has sufficient sealing ability over a long period of time, and is able to keep the base material of the plated steel sheets from being exposed and eluting into the electrolyte solution is provided. That is, a battery case comprised of a container body and a container lid, wherein the container body and the container lid are each comprised of a plated steel sheet, a joint part between the container and the container lid is comprised of a plating welded part containing a main constituent component of the plating of the plated steel sheet in 60 mass % or more and a steel sheet welded part containing the main constituent component of the plating in less than 60 mass %, and the plating welded part has a length of 0.5 ?m or more and less than 1.0 mm in a joint longitudinal direction.Type: GrantFiled: October 4, 2021Date of Patent: June 25, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Akinobu Kobayashi, Takehiro Takahashi, Yasuto Goto
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Patent number: 11992867Abstract: A hot stamped body comprising a steel base material and an Al—Zn—Mg-based plating layer formed on a surface of the steel base material, wherein the plating layer has a predetermined chemical composition, the plating layer comprises an interfacial layer positioned at an interface with the steel base material and containing Fe and Al and a main layer positioned on the interfacial layer, the main layer comprises, by area ratio, 10.0 to 90.0% of an Mg—Zn containing phase, 5.0 to less than 30.0% of an Fe—Al containing phase, and 2.0 to 25.0% of an Al—Si containing oxide phase, the Mg—Zn containing phase comprises at least one selected from the group consisting of an MgZn phase, Mg2Zn3 phase, and MgZn2 phase, and the Fe—Al containing phase comprises at least one of an FeAl phase and Fe—Al—Zn phase.Type: GrantFiled: February 27, 2020Date of Patent: May 28, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Takuya Mitsunobu, Takehiro Takahashi, Jun Maki
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Patent number: 11987863Abstract: A plated steel sheet includes: a steel sheet; and a plating layer that is formed on at least a part of a surface of the steel sheet, in which a chemical composition of the plating layer includes, b mass %, Al: 6.00% to 35.00 %, Mg: 3.00% to 15.00%, La+Ce: 0.0001% to 0.5000% in total, and Zn, and in a surface of the plating layer, the area ratio of a lamellar structure in which an (Al—Zn) phase and a MgZn2 phase are arranged in layers is 10% to 95%, the lamellar spacing of the lamellar structure is 2.5 ?m or less, and the area ratio of an (Al—Zn) dendrite is 10% or less.Type: GrantFiled: August 19, 2021Date of Patent: May 21, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Takuya Mitsunobu, Takehiro Takahashi, Hiroshi Takebayashi
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Patent number: 11965250Abstract: A hot stamped steel includes a base material, a plated layer that is formed on a surface of the base material, and an oxide film that is formed on a surface of the plated layer; chemical composition of the plated layer contains 20.00 to 45.00 mass % of Al, 10.00 to 45.00 mass % of Fe, 4.50 to 15.00 mass % of Mg, 0.10 to 3.00 mass % of Si, 0.05 to 3.00 mass % of Ca, 0 to 0.50 mass % of Sb, 0 to 0.50 mass % of Pb, 0 to 1.00 mass % of Cu, 0 to 1.00 mass % of Sn, 0 to 1.00 mass % of Ti, 0 to 0.50 mass % of Sr, 0 to 1.00 mass % of Cr, 0 to 1.00 mass % of Ni, and 0 to 1.00 mass % of Mn with a remainder of Zn and impurities; and chemical composition of the oxide film contains 20.0 to 55.0 at % of Mg, 0.5 to 15.0 at % of Ca, 0 to 15.0 at % of Zn, and 0 at % or more and less than 10.0 at % of Al with a remainder of O and a total of 5.0 at % or less of impurities, and the adhesion amount of the oxide film per one surface is in a range of 0.01 to 10 g/m2.Type: GrantFiled: August 28, 2020Date of Patent: April 23, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Takuya Mitsunobu, Kohei Tokuda, Takehiro Takahashi, Hiroshi Takebayashi
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Publication number: 20240116903Abstract: A compound has a tetra-hydroquinoline skeleton, the compound having inhibitory action against ferroptosis, and exerting therapeutic or preventive effect on diseases, disorders or syndromes related to ferroptosis inhibition, such as multiple sclerosis.Type: ApplicationFiled: December 24, 2021Publication date: April 11, 2024Inventors: Ken Nunettsu Asaba, Takehiro Takahashi, Masashi Yamamoto, Kozue Takagaki, Marina Nogami, Riichiro Tsuji, Hiroyuki Meguro, Naoya Ukegawa
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Publication number: 20240093708Abstract: The present disclosure inhibits liquid metal embrittlement (LME) cracking and improves corrosion resistance in a welded joint obtained by spot welding a first steel sheet and a second steel sheet. In the welded joint of the present disclosure, a first plating layer is provided on a surface of the first steel sheet facing the second steel sheet, no plating layer is present on or a second plating layer is provided on a surface of the second steel sheet facing the first steel sheet, and a boundary plating layer is provided between the first steel sheet and the second steel sheet in a range of 0.5 mm from an end part of the corona bond toward an outside of the spot welded part. A higher tensile strength of a tensile strength of the first steel sheet and a tensile strength of the second steel sheet is 780 MPa or more, an area ratio of a MgZn2 phase at the cross-section of the boundary plating layer is 10% or more, and the first plating layer and the second plating layer satisfy a predetermined Relation I.Type: ApplicationFiled: December 24, 2021Publication date: March 21, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Takuya MITSUNOBU, Hiroshi TAKEBAYASHI, Takehiro TAKAHASHI
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Publication number: 20240084833Abstract: The present disclosure inhibits liquid metal embrittlement (LME) cracking and improves corrosion resistance in a welded joint obtained by spot welding a first steel sheet and a second steel sheet. In the welded joint of the present disclosure, a first plating layer is provided on a surface of the first steel sheet facing the second steel sheet, no plating layer is present on or a second plating layer is provided on a surface of the second steel sheet facing the first steel sheet, a boundary plating layer is provided between the first steel sheet and the second steel sheet in a range of 0.5 mm from an end part of the corona bond of the spot welded part toward an outside of the spot welded part, and a Zn penetrated part is present at least at one of the first steel sheet and the second steel sheet adjoining the boundary plating layer.Type: ApplicationFiled: December 24, 2021Publication date: March 14, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Takuya MITSUNOBU, Hiroshi TAKEBAYASHI, Takehiro TAKAHASHI
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Patent number: 11925114Abstract: The present invention provides an indenocarbazole compound characterized by having hole transporting properties, being used as a constituent material of an organic electroluminescence device, and being represented by the following general formula (1), and an organic electroluminescence device having a pair of electrodes and at least one organic layer sandwiched therebetween is characterized in that the indenocarbazole compound is used as a constituent material of at least one organic layer. The indenocarbazole compound according to the present invention has (1) excellent hole transporting properties, (2) excellent electron blocking properties, (3) a stable thin film state, and excellent heat resistance. The organic electroluminescence device according to the present invention has a high light-emitting efficiency and high brightness.Type: GrantFiled: October 18, 2017Date of Patent: March 5, 2024Assignee: HODOGAYA CHEMICAL CO., LTD.Inventors: Takehiro Takahashi, Hideyoshi Kitahara, Junichi Izumida
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Patent number: 11916243Abstract: A cell case of a secondary battery having a rectangular tube-shaped can body, a can bottom double seamed to a bottom end of the can body, and a can lid double seamed to a top end of the can body, in which cell case of a secondary battery, an area ratio S1 of part of the can bottom, including a portion 1 between a plane vertical to the can body a distance of 0.5 mm above a bottom end of a double seam of the can body and the can bottom and a plane vertical to the can body a distance of 1.0 mm below the bottom end of the double seam, with respect to a cross-sectional area of the can body at the bottom end of the double seam is 50% or more, and a battery module having a plurality of such cell cases are provided.Type: GrantFiled: September 7, 2021Date of Patent: February 27, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Takehiro Takahashi, Akinobu Kobayashi
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Publication number: 20240058888Abstract: The present disclosure inhibits liquid metal embrittlement (LME) cracking in a welded joint obtained by spot welding a first steel sheet and a second steel sheet. In the welded joint of the present disclosure, a first plating layer is provided on a surface of the first steel sheet facing the second steel sheet, no plating layer is present on or a second plating layer is provided on a surface of the second steel sheet facing the first steel sheet, and a boundary plating layer is provided between the first steel sheet and the second steel sheet in a range of 0.5 mm from an end part of the corona bond toward an outside of the spot welded part. A higher tensile strength of a tensile strength of the first steel sheet and a tensile strength of the second steel sheet is 780 MPa or more, an area ratio of a ?-Zn phase at the cross-section of the boundary plating layer is 5% or more, and the first plating layer and the second plating layer satisfy predetermined Relations I and II.Type: ApplicationFiled: December 24, 2021Publication date: February 22, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Takuya MITSUNOBU, Hiroshi TAKEBAYASHI, Takehiro TAKAHASHI
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Publication number: 20240001423Abstract: This hot stamped member includes: a steel; and a plating layer formed on the steel, in which the plating layer has a predetermined chemical composition, the plating layer contains a Zn-based oxide including one or two of a Zn oxide and a Zn—Mg oxide having a size of 1.0 ?m or more and 10.0 ?m or less in a thickness direction of the plating layer and 0.1 ?m or more in a direction perpendicular to the thickness direction, and in a cross section of the plating layer in the thickness direction, when a length of an interface between the plating layer and the steel is indicated as Le, a sum of lengths of the Zn-based oxide projected onto the interface from an upper surface of the plating layer is indicated as ?Li, and a sum of lengths of portions of the Zn-based oxide in contact with the plating layer projected onto the interface from the upper surface of the plating layer is indicated as ?Lai, ?Li/Le?0.10 and ?Lai/?Li?0.50 are satisfied.Type: ApplicationFiled: January 14, 2022Publication date: January 4, 2024Inventors: Takuya MITSUNOBU, Hiroshi TAKEBAYASHI, Takehiro TAKAHASHI