Patents by Inventor Koji Akioka
Koji Akioka 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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Publication number: 20240044013Abstract: This surface-treated steel sheet includes: a steel sheet; a Zn-based plating layer formed on the steel sheet; and a coating formed on the Zn-based plating layer, in which a Si concentration, a P concentration, a F concentration, a V concentration, a Zr concentration, a Zn concentration, and an Al concentration of the coating are, by mass %, Si: 10.00% to 25.00%, P: 0.01% to 5.00%, F: 0.01% to 2.00%, V: 0.01% to 4.00%, Zr: 0.01% to 3.00%, Zn: 0% to 3.00%, and Al: 0% to 3.00%, in a narrow spectrum of 5i2p obtained by performing XP S analysis on a surface of the coating, a ratio of an integrated intensity of a peak having a local, maximum value, at 103.37±0.25 eV to an integrated intensity of a peak having a local maximum value at 102.26±0.25 eV is 0.04 or more and 0.25 or less.Type: ApplicationFiled: January 6, 2022Publication date: February 8, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Atsuo SHIMIZU, Ikumi TOKUDA, Hiromasa SHOJI, Koji AKIOKA
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Publication number: 20220002894Abstract: A coated titanium material includes a titanium material and a coating film formed on a surface of the titanium material. A Ti-based oxide is included in an interface between the titanium material and the coating film. The Ti-based oxide is one or both rutile type TiO2 and Ti2O3. In a case where a cut surface of the coating film is formed by using a SAICAS method under conditions that a horizontal speed is 2 ?m/s and a vertical speed is 0.1 ?m/s, on the cut surface, an area percentage of the Ti-based oxide is 30.0% or more in a region having a distance of 15 ?m from a reference line specified on the basis of a boundary line, which is an intersection line between the cut surface and the interface, to a coating film side.Type: ApplicationFiled: January 23, 2020Publication date: January 6, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Kazuhiro TAKAHASHI, Koji AKIOKA, Eiji IKEDA, Hideya KAMINAKA
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Patent number: 11028276Abstract: Provided are a surface-treated metal sheet excellent in the adhesiveness to a coating treatment film and weldability and a coated member.Type: GrantFiled: March 30, 2016Date of Patent: June 8, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Yasuaki Kawamura, Koji Akioka, Akihiro Sengoku, Yoichiro Mori
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Patent number: 10987695Abstract: A hot-dip zinc-based plated steel sheet includes: a base steel sheet that is a metal substrate; a hot-dip zinc-based plating layer provided on the base steel sheet; and a surface treatment layer formed on at least one surface of the hot-dip zinc-based plating layer, in which the surface treatment layer contains more than or equal to 0.1 g/m2 and less than or equal to 1.2 g/m2 of granular oxide per one surface on a metal basis in which, in a temperature range of 900 to 1300 K, standard free energy of formation (?G0) of oxide is smaller than standard free energy of formation (?G0Zn) of zinc oxide and larger than standard free energy of formation (?G0Al) of aluminum oxide at an identical temperature, and the granular oxide has a particle size of more than or equal to 3 nm and less than or equal to 100 nm.Type: GrantFiled: March 31, 2016Date of Patent: April 27, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Koji Akioka, Yasuaki Kawamura, Akihiro Sengoku
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Patent number: 10851465Abstract: [Object] To provide a zinc-based plated steel sheet excellent in coating film adhesiveness after hot pressing more conveniently. [Solution] A zinc-based plated steel sheet according to the present invention comprises: a zinc-based plated steel sheet that is a base metal; and a surface treatment layer formed on at least one surface of the zinc-based plated steel sheet, in which the surface treatment layer contains one or more oxides selected from titanium oxide, nickel oxide, and tin(IV) oxide each having a particle size of more than or equal to 2 nm and less than or equal to 500 nm, in a range of more than or equal to 0.2 g/m2 and less than or equal to 2 g/m2 per one surface.Type: GrantFiled: March 31, 2016Date of Patent: December 1, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Yasuaki Kawamura, Koji Akioka, Akihiro Sengoku
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Patent number: 10549506Abstract: [Object] To provide a hot-dip zinc-based plated steel sheet excellent in coating film adhesiveness after hot pressing more conveniently. [Solution] A hot-dip zinc-based plated steel sheet according to the present invention includes: a hot-dip zinc-based plated steel sheet that is a base metal; and a surface treatment layer formed on at least one surface of the hot-dip zinc-based plated steel sheet, in which the surface treatment layer contains one or more oxides selected from zirconia, lanthanum oxide, cerium oxide, and neodymium oxide each having a particle size of more than or equal to 5 nm and less than or equal to 500 nm, in a range of more than or equal to 0.2 g/m2 and less than or equal to 2 g/m2 per one surface.Type: GrantFiled: March 31, 2016Date of Patent: February 4, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Yasuaki Kawamura, Koji Akioka, Akihiro Sengoku
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Publication number: 20200032360Abstract: Provided is a hot stamped body which includes a base metal, and a plated layer formed on a surface of the base metal, wherein the plated layer includes an interface layer, an intermediate layer, and an oxide layer in order from a base metal side, the interface layer contains one or more kinds of Fe—Al alloy, a total area fraction of the Fe—Al alloy being 99% or more, the intermediate layer 22 contains one or more kinds of Fe—Al—Zn alloy, a total area fraction of the Fe—Al—Zn phase being 50% or more, an average composition of the intermediate layer contains, in mass %, Al: 30 to 50% and Zn: 15 to 30%, and an average film thickness of the oxide layer is 3.0 ?m or less, and Mg content in the oxide layer is 0.05 to 0.50 g/m2.Type: ApplicationFiled: March 31, 2017Publication date: January 30, 2020Applicant: NIPPON STEEL CORPORATIONInventors: Akihiro SENGOKU, Hiroshi TAKEBAYASHI, Koji AKIOKA, Kenichiro MATSUMURA
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Patent number: 10370735Abstract: A steel product bent by heating to 600° C. or more, specifically a heat treated steel product having high strength and excellent chemical conversion coating ability which has scale with FeO content of 90% or more, having a thickness of 1 ?m or less on the surface.Type: GrantFiled: October 5, 2015Date of Patent: August 6, 2019Assignee: NIPPON STEEL CORPORATIONInventors: Hideki Matsuda, Koji Akioka, Kazuo Uematsu
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Publication number: 20190160507Abstract: A hot stamped steel according to one embodiment of the present invention includes a base material and a plated layer, wherein the plated layer includes an interface layer, an intermediate layer, and an oxide layer in order from a base material side to a surface side; in which compositions and thicknesses of each layer are controlled.Type: ApplicationFiled: May 10, 2016Publication date: May 30, 2019Applicant: Nippon Steel & Sumitomo Metal CorporationInventors: Akihiro SENGOKU, Hiroshi TAKEBAYASHI, Koji AKIOKA
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Publication number: 20180112084Abstract: Provided are a surface-treated metal sheet excellent in the adhesiveness to a coating treatment film and weldability and a coated member.Type: ApplicationFiled: March 30, 2016Publication date: April 26, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yasuaki KAWAMURA, Koji AKIOKA, Akihiro SENGOKU, Yoichiro MORI
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Publication number: 20180079174Abstract: [Object] To provide a hot-dip zinc-based plated steel sheet excellent in coating film adhesiveness after hot pressing more conveniently. [Solution] A hot-dip zinc-based plated steel sheet according to the present invention includes: a hot-dip zinc-based plated steel sheet that is a base metal; and a surface treatment layer formed on at least one surface of the hot-dip zinc-based plated steel sheet, in which the surface treatment layer contains one or more oxides selected from zirconia, lanthanum oxide, cerium oxide, and neodymium oxide each having a particle size of more than or equal to 5 nm and less than or equal to 500 nm, in a range of more than or equal to 0.2 g/m2 and less than or equal to 2 g/m2 per one surface.Type: ApplicationFiled: March 31, 2016Publication date: March 22, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yasuaki KAWAMURA, Koji AKIOKA, Akihiro SENGOKU
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Publication number: 20180050367Abstract: [Object] To provide a hot-dip zinc-based plated steel sheet which suppresses excessive production of zinc oxides on an outer layer after hot pressing more conveniently and is excellent in corrosion resistance at an uncoated portion. [Solution] A hot-dip zinc-based plated steel sheet according to the present invention includes: a base steel sheet that is a metal substrate; a hot-dip zinc-based plating layer provided on the base steel sheet; and a surface treatment layer formed on at least one surface of the hot-dip zinc-based plating layer, in which the surface treatment layer contains more than or equal to 0.1 g/m2 and less than or equal to 1.Type: ApplicationFiled: March 31, 2016Publication date: February 22, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Koji AKIOKA, Yasuaki KAWAMURA, Akihiro SENGOKU
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Publication number: 20180044809Abstract: [Object] To provide a zinc-based plated steel sheet excellent in coating film adhesiveness after hot pressing more conveniently. [Solution] A zinc-based plated steel sheet according to the present invention comprises: a zinc-based plated steel sheet that is a base metal; and a surface treatment layer formed on at least one surface of the zinc-based plated steel sheet, in which the surface treatment layer contains one or more oxides selected from titanium oxide, nickel oxide, and tin(IV) oxide each having a particle size of more than or equal to 2 nm and less than or equal to 500 nm, in a range of more than or equal to 0.2 g/m2 and less than or equal to 2 g/m2 per one surface.Type: ApplicationFiled: March 31, 2016Publication date: February 15, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yasuaki KAWAMURA, Koji AKIOKA, Akihiro SENGOKU
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Publication number: 20180030582Abstract: [Object] To provide a zinc-based plated steel sheet excellent in coating adhesiveness after hot pressing more conveniently. [Solution] A zinc-based plated steel sheet according to the present invention includes: a zinc-based plated steel sheet that is a base metal; and a surface treatment layer formed on at least one surface of the zinc-based plated steel sheet and containing one or more magnesium compounds. The amount of the one or more magnesium compounds contained is not less than 0.2 g/m2 and not more than 5.0 g/m2 per one surface on a magnesium oxide basis.Type: ApplicationFiled: March 31, 2016Publication date: February 1, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Akihiro SENGOKU, Koji AKIOKA, Yasuaki KAWAMURA
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Publication number: 20170292171Abstract: A steel product bent by heating to 600° C. or more, specifically a heat treated steel product having high strength and excellent chemical conversion coating ability which has scale with FeO content of 90% or more, having a thickness of 1 ?m or less on the surface.Type: ApplicationFiled: October 5, 2015Publication date: October 12, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Hideki MATSUDA, Koji AKIOKA, Kazuo UEMATSU
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Patent number: 8080355Abstract: A liquid developer includes an insulation liquid containing a fatty acid monoester, and toner particles comprised of a polyester resin. By using the liquid developer, it is possible to provide superior fixing characteristic of toner particles to a recording medium. An image forming apparatus that can suitably use such a liquid developer is also provided.Type: GrantFiled: February 15, 2008Date of Patent: December 20, 2011Assignee: Seiko Epson CorporationInventors: Takashi Teshima, Koji Akioka, Ken Ikuma
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Patent number: 8021815Abstract: A liquid developer includes a toner particle mainly composed of a resin material, and a nonvolatile insulating liquid, the resin material including an ethylene copolymer, and the insulating liquid including fatty acid triglyceride.Type: GrantFiled: March 26, 2008Date of Patent: September 20, 2011Assignee: Seiko Epson CorporationInventor: Koji Akioka
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Patent number: 7943282Abstract: A liquid developer includes: an insulating liquid having dispersed therein toner particles, the insulating liquid containing a fatty acid monoester that is an ester of a fatty acid and a monohydric alcohol, and the insulating liquid having an aniline point of from 5 to 80° C.Type: GrantFiled: November 7, 2007Date of Patent: May 17, 2011Assignee: Seiko Epson CorporationInventors: Koji Akioka, Takashi Teshima, Satoru Miura, Shunichiro Yamanaka, Ken Ikuma
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Patent number: 7932009Abstract: A liquid developer includes toner particles formed of a resin material and a coloring agent, and an insulation liquid in which the toner particles are dispersed, the insulation liquid containing ester-exchange oil obtained by an ester-exchange reaction of linseed oil and at least one of semidrying oil and nondrying oil. It is preferred that the insulation liquid further contains fatty acid monoester. Further, it is preferred that the amount of the fatty acid monoester contained in the insulation liquid is in the range of 5 to 50 wt %.Type: GrantFiled: February 26, 2007Date of Patent: April 26, 2011Assignee: Seiko Epson CorporationInventors: Koji Akioka, Ken Ikuma
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Patent number: 7883825Abstract: An image forming apparatus which forms an image onto a recording medium using a liquid developer which contains an insulation liquid and toner particles dispersed in the insulation liquid is provided. The image forming apparatus includes a liquid developer storage section for storing the liquid developer therein; a developing section for developing a toner image using the liquid developer supplied from the liquid developer storage section; an image transfer section for transferring the developed toner image formed by the developing section onto the recording medium to form a transferred image thereon; and a fixing section for fixing the transferred image formed on the recording medium onto the recording medium, wherein at least a part of the insulation liquid in the transferred image is oxidized and polymerized to fix the toner particles in the transferred image onto the recording medium. According to the image forming apparatus, it is possible to fix the toner particles onto the recording medium firmly.Type: GrantFiled: September 29, 2006Date of Patent: February 8, 2011Assignee: Seiko Epson CorporationInventor: Koji Akioka