Patents by Inventor Michio Nitta
Michio Nitta 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: 10761035Abstract: This diagnosis support apparatus is a diagnosis support apparatus of a vacuum degassing tank having an immersion tube that extends downward, the diagnosis support apparatus including a camera that is configured to capture an image of an inner circumferential surface of an immersion tube seen from below at an angle in a state of being disposed outside the inner circumferential surface of the immersion tube in a plan view and acquire the image as data and an image processor that is configured to be connected to the camera and carry out image-processing of the data.Type: GrantFiled: December 6, 2017Date of Patent: September 1, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Susumu Kudo, Michio Nitta, Masaki Miyashita, Seiya Fujita, Naoki Watabe
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Publication number: 20190360944Abstract: This diagnosis support apparatus is a diagnosis support apparatus of a vacuum degassing tank having an immersion tube that extends downward, the diagnosis support apparatus including a camera that is configured to capture an image of an inner circumferential surface of an immersion tube seen from below at an angle in a state of being disposed outside the inner circumferential surface of the immersion tube in a plan view and acquire the image as data and an image processor that is configured to be connected to the camera and carry out image-processing of the data.Type: ApplicationFiled: December 6, 2017Publication date: November 28, 2019Applicant: NIPPON STEEL CORPORATIONInventors: Susumu KUDO, Michio NITTA, Masaki MIYASHITA, Seiya FUJITA, Naoki WATABE
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Carbonaceous refractory and method of production of same and also blast furnace bottom or side walls
Patent number: 8889062Abstract: A carbonaceous refractory and a method of production is provided, which prevents a drop in the molten pig iron corrosion resistance, molten pig iron penetration resistance, and other properties of carbonaceous refractories required for blast furnace bottom refractories. The mechanical strength of the refractories is raised so as to suppress cracking due to thermal stress. The carbonaceous refractory comprises a carbonaceous material comprising one or more of calcined anthracite, calcined coke, natural graphite, or artificial graphite in 60 to 85 mass %, a refractory metal oxide in 5 to 15 mass %, metal silicon in 4 to 15 mass %, and carbon black in 2 to 10 mass %. An organic binder is added to refractory materials, which are kneaded, molded and fired in a nonoxidizing atmosphere.Type: GrantFiled: February 17, 2010Date of Patent: November 18, 2014Assignees: Nippon Steel & Sumitomo Metal Corporation, Nippon Electrode Co., Ltd.Inventors: Hiroyuki Inoue, Michio Nitta, Taijiro Matsui, Tsutomu Wakasa, Yoshiyuki Yamagami, Toru Mochida -
Patent number: 8076255Abstract: To provide a long-life refractory capable of maintaining durability under severe conditions. The castable refractory comprises a mixture containing at least one of 2 to 10 mass % of silicon carbide and 3 to 10 mass % of chamotte, as an auxiliary raw material, and a binder material, with the remaining balance being one or more main raw materials selected from corundum, mullite, bauxite, chamotte, talc and silica, and is used in an environment exposed to an alkali component-containing hot gas atmosphere. In an alkali component-containing gas atmosphere at a high temperature (750° C. or more), silicon carbide and/or chamotte are vitrified to a thickness of 1 mm or less in the surface layer of the refractory to prevent the alkali component-containing gas from intruding inside of the refractory.Type: GrantFiled: October 27, 2006Date of Patent: December 13, 2011Assignee: Nippon Steel CorporationInventors: Satoru Ito, Hitoshi Nakamura, Taijiro Matsui, Michio Nitta
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Publication number: 20110298166Abstract: The present invention provides a carbonaceous refractory, and a method of production of the same, which prevents a drop in the molten pig iron corrosion resistance, molten pig iron penetration resistance, and other properties of carbonaceous refractories required for blast furnace bottom refractories and, further, raises the mechanical strength of the refractories so as to suppress cracking due to thermal stress, that is, a carbonaceous refractory characterized by comprising a carbonaceous material comprised of one or more of calcined anthracite, calcined coke, natural graphite, or artificial graphite in 60 to 85 mass %, a refractory metal oxide in 5 to 15 mass %, metal silicon in 4 to 15 mass %, and carbon black in 2 to 10 mass % and by being obtained by adding an organic binder to refractory materials made a total 100 mass %, kneading the materials, then molding them and firing them in a nonoxidizing atmosphere.Type: ApplicationFiled: February 17, 2010Publication date: December 8, 2011Inventors: Hiroyuki Inoue, Michio Nitta, Taijiro Matsui, Tsutomu Wakasa, Yoshiyuki Yamagami, Toru Mochida
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Publication number: 20090130618Abstract: To provide a long-life refractory capable of maintaining durability under severe conditions. The castable refractory comprises a mixture containing at least one of 2 to 10 mass % of silicon carbide and 3 to 10 mass % of chamotte, as an auxiliary raw material, and a binder material, with the remaining balance being one or more main raw materials selected from corundum, mullite, bauxite, chamotte, talc and silica, and is used in an environment exposed to an alkali component-containing hot gas atmosphere. In an alkali component-containing gas atmosphere at a high temperature (750° C. or more), silicon carbide and/or chamotte are vitrified to a thickness of 1 mm or less in the surface layer of the refractory to prevent the alkali component-containing gas from intruding inside of the refractory.Type: ApplicationFiled: October 27, 2006Publication date: May 21, 2009Applicant: NIPPON STEEL CORPORATIONInventors: Satoru Ito, Hitoshi Nakamura, Taijiro Matsui, Michio Nitta
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Patent number: 6875716Abstract: A carbonaceous refractory material is produced by adding an organic binder to a mixture containing a carbonaceous material comprising a carbonaceous raw material comprising calcined anthracite, calcined coke, artificial graphite or natural graphite or a mixture thereof at 50 to 85% as the principal raw material, alumina particle at 5 to 15%, metal silicon particle at 5 to 15%, and one or two or more of titanium carbide powder, titanium nitride powder and titanium carbonitride powder at 5 to 20% in total, kneading and molding the resulting mixture and baking the molded article under non-oxidizing atmosphere. By using the carbonaceous refractory material as the inner lining material for the side wall and bottom of blast furnace hearth, the consumption of the inner lining material due to the dissolution thereof in melted pig iron can be decreased, and simultaneously, the abrasion due to the flow of melted pig iron can be decreased, which works to prolong the life of the blast furnace.Type: GrantFiled: March 30, 2001Date of Patent: April 5, 2005Assignees: Nippon Steel Corporation, Nippon Electrode Company, Ltd.Inventors: Akio Ishii, Hitoshi Nakamura, Michio Nitta, Tsutomu Wakasa, Hirofumi Mikami, Yoshiyuki Yamagami
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Publication number: 20020183189Abstract: A carbonaceous refractory material is produced by adding an organic binder to a mixture containing a carbonaceous material comprising a carbonaceous raw material comprising calcined anthracite, calcined coke, artificial graphite or natural graphite or a mixture thereof at 50 to 85% as the principal raw material, alumina particle at 5 to 15%, metal silicon particle at 5 to 15%, and one or two or more of titanium carbide powder, titanium nitride powder and titanium carbonitride powder at 5 to 20% in total, kneading and molding the resulting mixture and baking the molded article under non-oxidizing atmosphere. By using the carbonaceous refractory material as the inner lining material for the side wall and bottom of blast furnace hearth, the consumption of the inner lining material due to the dissolution thereof in melted pig iron can be decreased, and simultaneously, the abrasion due to the flow of melted pig iron can be decreased, which works to prolong the life of the blast furnace.Type: ApplicationFiled: November 28, 2001Publication date: December 5, 2002Inventors: Akio Ishii, Hitoshi Nakamura, Michio Nitta, Tsutomu Wakasa, Hirofumi Mikami, Yoshiyuki Yamagami
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Patent number: 5639558Abstract: The present invention provides a bonding wire having a good bonding property, no damage sustained to coatings during bonding, and capability of retaining an excellent insulating property even when wires come into impact with one another in the resin molding step, characterized in that the resin has a thermal weight loss at a temperature of 110.degree. C. in air of not less than 85% and an tensile strength at 180.degree. C. of not less than 300 kgf/cm.sup.2. The resins satisfying the specified characteristic conditions can be selected from the group consisting of polyparabanic acid based resins and polyarylate resins.Type: GrantFiled: March 6, 1995Date of Patent: June 17, 1997Assignee: Nippon Steel CorporationInventors: Kohei Tatsumi, Hiroyuki Kondo, Michio Nitta, Shinya Nariki
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Patent number: 5460636Abstract: An impurity scavenging system which scavenges impurities of off-gases discharged from a clean room of a production line for semiconductors. The impurity scavenging system has a gas introduction line through which gas to be processed (hereinafter referred as GSP) is discharged, a scavenging unit which stores scavenging liquid, a condenser for condensing vaporized liquid from the scavenging unit, a first pump which pumps the GSP of a discharging line connected with the downstream side of the condenser, a liquid source, a cleaning liquid line which connects the discharging line to a drain and a first valve having ports, including a first port connected with the condenser, a second port connected with the first pump, and a third port connected with one end of the cleaning line another end of which is connected to the drain, thereby selectively enabling a connection from the condenser to the first pump and a connection from the condenser to the cleaning line.Type: GrantFiled: November 30, 1993Date of Patent: October 24, 1995Assignees: Tokico Ltd., Mitsubishi CorporationInventors: Hiroyuki Harada, Tsutomu Koinuma, Terufumi Iwata, Michio Nitta
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Patent number: 4662826Abstract: A vacuum pump includes a rotary vacuum pump including a pair of rotors cooperating to suck gas, a driving source connected to a shaft of one of the pair of rotors, timing gears connected to respective shafts of the rotors and transmitting the driving force of the driving source between the shafts of the pair rotors, and a reciprocating vacuum pump connected to the driving source and connected to the downstream side of the rotary vacuum pump for sucking gas therefrom.Type: GrantFiled: April 17, 1985Date of Patent: May 5, 1987Assignee: Tokico Ltd.Inventors: Michio Nitta, Hiroyuki Suzuki, Yoshifumi Fukuhara