Patents by Inventor Chika Ito
Chika Ito 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: 11977042Abstract: An oxygen sensor for detecting gas concentration based on either an electric current value or a resistance value measured when a voltage is applied to a sensor element includes gaps formed between electrodes arranged in an element main body and ridges where surfaces of an element touch each other. These gaps will be escaping parts for expansion and contraction of electrode material that accompany thermal expansion and contraction of a sensor main body, and concentration of thermal stress at edge parts of the element main body may thus be eliminated, thereby alleviating thermal stress on the oxygen sensor. This allows provision of a gas sensor that controls generation of cracks in the element and that is stably usable over a long period of time.Type: GrantFiled: March 20, 2019Date of Patent: May 7, 2024Assignee: KOA CorporationInventors: Chika Ito, Ken Takahashi, Tetsuro Tanaka, Kenichi Iguchi
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Publication number: 20230349851Abstract: A sensor element (12) has a cross-sectional area that continuously only increases from a positive (+) electrode side toward a negative (?) electrode side, thereby leading a hot spot, which attempts to move to the negative electrode side, to a lower resistance side. A position that is at nearly equal distances from paired electrodes (13 and 15) formed on either end of the sensor element (12) is set as a hot spot generating position, so as to avoid damage to the electrodes due to heat emitted by the hot spot.Type: ApplicationFiled: June 7, 2023Publication date: November 2, 2023Inventors: Tetsuro TANAKA, Kenichi IGUCHI, Ken TAKAHASHI, Chika ITO
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Patent number: 11063035Abstract: An ESD protection circuit includes a first fin structure having fins of a first conductivity type and a second fin structure having fins of a second conductivity type, the second fin structure being opposed to the first fin structure. A first power interconnect connected with the first fin structure and a signal interconnect connected with the second fin structure are formed in a first interconnect layer, and a second power interconnect connected with the first power interconnect is formed in a second interconnect layer. The width occupied by the second fin structure is greater than that of the first fin structure, and the width of the signal interconnect is greater than that of the first power interconnect.Type: GrantFiled: February 27, 2020Date of Patent: July 13, 2021Assignee: SOCIONEXT INC.Inventors: Chika Ito, Isaya Sobue, Hidetoshi Tanaka
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Publication number: 20210041409Abstract: An oxygen sensor element made of a ceramic sintered body detects oxygen concentration based on an electric current value measured when a voltage is applied. The ceramic sintered body has a composition formula LnBa2-xSrxCu3O7-? generated by substituting any element selected from group 2 elements in the periodic table, such as strontium (Sr), for a part of a composition formula LnBa2Cu3O7-? (Ln denotes rare earth element and ? is 0 to 1). Sr substitution quantity x should satisfy an inequality constraint 0<x?1.5. This allows provision of an oxygen sensor element that improves durability etc. without losing sensor characteristics.Type: ApplicationFiled: January 30, 2019Publication date: February 11, 2021Inventors: Tomoichiro OKAMOTO, Kenichi IGUCHI, Ken TAKAHASHI, Tetsuro TANAKA, Chika ITO
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Publication number: 20210018456Abstract: An oxygen sensor for detecting gas concentration based on either an electric current value or a resistance value measured when a voltage is applied to a sensor element includes gaps formed between electrodes arranged in an element main body and ridges where surfaces of an element touch each other. These gaps will be escaping parts for expansion and contraction of electrode material that accompany thermal expansion and contraction of a sensor main body, and concentration of thermal stress at edge parts of the element main body may thus be eliminated, thereby alleviating thermal stress on the oxygen sensor. This allows provision of a gas sensor that controls generation of cracks in the element and that is stably usable over a long period of time.Type: ApplicationFiled: March 20, 2019Publication date: January 21, 2021Inventors: Chika ITO, Ken TAKAHASHI, Tetsuro TANAKA, Kenichi IGUCHI
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Publication number: 20210010963Abstract: A sensor element has a cross-sectional area that increases either uniformly or gradually from a positive (+) electrode side toward a negative (?) electrode side, thereby leading a hot spot, which attempts to move to the negative electrode side, to a lower resistance side. A position that is at nearly equal distances from paired electrodes formed on either end of the sensor element is set as a hot spot generating position, so as to avoid damage to the electrodes due to heat emitted by the hot spot.Type: ApplicationFiled: March 20, 2019Publication date: January 14, 2021Inventors: Tetsuro TANAKA, Kenichi IGUCHI, Ken TAKAHASHI, Chika ITO
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Patent number: 10886220Abstract: For a semiconductor integrated circuit device in which IO cells are disposed, power supply voltage drop can be reduced using a multilayer interconnect. A power supply interconnect formed in a plurality of interconnect layers extends in an X direction that is a same direction as a direction in which the IO cells are aligned. In an area of a power supply IO cell, a power supply interconnect extending in a Y direction is disposed in one of the interconnect layers in which the power supply interconnect is not formed and an interconnect piece is disposed in a same position as a position of the power supply interconnect formed in an area of a signal IO cell in the Y direction at each of both ends of the area of the power supply IO cell in the X direction.Type: GrantFiled: August 29, 2019Date of Patent: January 5, 2021Assignee: SOCIONEXT INC.Inventors: Chika Ito, Isaya Sobue
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Publication number: 20200203334Abstract: An ESD protection circuit includes a first fin structure having fins of a first conductivity type and a second fin structure having fins of a second conductivity type, the second fin structure being opposed to the first fin structure. A first power interconnect connected with the first fin structure and a signal interconnect connected with the second fin structure are formed in a first interconnect layer, and a second power interconnect connected with the first power interconnect is formed in a second interconnect layer. The width occupied by the second fin structure is greater than that of the first fin structure, and the width of the signal interconnect is greater than that of the first power interconnect.Type: ApplicationFiled: February 27, 2020Publication date: June 25, 2020Inventors: Chika ITO, Isaya SOBUE, Hidetoshi TANAKA
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Publication number: 20190385945Abstract: For a semiconductor integrated circuit device in which IO cells are disposed, power supply voltage drop can be reduced using a multilayer interconnect. A power supply interconnect formed in a plurality of interconnect layers extends in an X direction that is a same direction as a direction in which the IO cells are aligned. In an area of a power supply IO cell, a power supply interconnect extending in a Y direction is disposed in one of the interconnect layers in which the power supply interconnect is not formed and an interconnect piece is disposed in a same position as a position of the power supply interconnect formed in an area of a signal IO cell in the Y direction at each of both ends of the area of the power supply IO cell in the X direction.Type: ApplicationFiled: August 29, 2019Publication date: December 19, 2019Inventors: Chika ITO, Isaya SOBUE
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Patent number: 9779904Abstract: A chip type fuse excellent in resistance to climate conditions, where the fuse is able to operate stably under high temperature and high humidity environments. The fuse includes an insulative substrate; an under-glass layer formed on the insulative substrate; a fuse element formed on the under-glass layer; a pair of electrodes formed at both end sides of the fuse element; and an over-glass layer covering at least a fusing section of the fuse element; wherein the fuse element includes a layer where a first metal layer and a second metal layer are piled up, and a barrier layer consisting of a third metal layer, which covers the first metal layer and the second metal layer with a width that is wider than the width of the first metal layer and the second metal layer. The third metal layer overwraps the second metal layer and the first metal layer.Type: GrantFiled: June 15, 2015Date of Patent: October 3, 2017Assignee: KOA CORPORATIONInventors: Takahiro Ishikawa, Hiroshi Ichikawa, Chika Ito
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Publication number: 20150371804Abstract: Provided is a chip type fuse excellent in resistance to climatic condition, where the fuse is able to operate stably under high temperature and high humidity environments. The fuse includes an insulative substrate; an under-glass layer formed on the insulative substrate; a fuse element formed on the under-glass layer; a pair of electrodes formed at both end sides of the fuse element; and an over-glass layer covering at least a fusing section of the fuse element; wherein the fuse element includes a layer where a first metal layer and a second metal layer are piled up, and a barrier layer consisting of a third metal layer, which covers the first metal layer and the second metal layer with width that is wider than the width of the first metal layer and the second metal layer. The third metal layer overwraps the second metal layer intervening and the first metal layer.Type: ApplicationFiled: June 15, 2015Publication date: December 24, 2015Applicant: KOA CORPORATIONInventors: Takahiro Ishikawa, Hiroshi Ichikawa, Chika Ito
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Patent number: 8557929Abstract: A method for producing a biodegradable polyoxyalkylene derivative, includes: reacting a biodegradable polyoxyalkylene compound represented by the formula (1) as defined herein with a compound represented by one of the formulae (I) to (IV) as defined herein in a presence of an alkaline solid salt, the biodegradable polyoxyalkylene derivative being represented by the formula (2) as defined herein.Type: GrantFiled: September 28, 2007Date of Patent: October 15, 2013Assignee: NOF CorporationInventors: Kazuhiro Kubo, Shigeru Kitano, Chika Ito
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Publication number: 20090202619Abstract: A polyoxyalkylene chain-containing lipid derivative, which is represented by the following formula (1): wherein L, Y, W, X1, X2, X3, OA, Z, m1, m2, m3, n1, n2 and n3 are as defined in the specification.Type: ApplicationFiled: February 17, 2006Publication date: August 13, 2009Applicants: THE UNIVERSITY OF TOKUSHIMA, NOF CORPORATIONInventors: Hiroshi Kiwada, Tatsuhiro Ishida, Chika Ito, Kazuhiro Kubo, Kenji Sakanoue, Hiroshi Kikuchi
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Publication number: 20080081888Abstract: A method for producing a biodegradable polyoxyalkylene derivative, includes: reacting a biodegradable polyoxyalkylene compound represented by the formula (1) as defined herein with a compound represented by one of the formulae (I) to (IV) as defined herein in a presence of an alkaline solid salt, the biodegradable polyoxyalkylene derivative being represented by the formula (2) as defined herein.Type: ApplicationFiled: September 28, 2007Publication date: April 3, 2008Applicant: NOF CORPORATIONInventors: Kazuhiro KUBO, Shigeru KITANO, Chika ITO
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Patent number: 6605704Abstract: A regulator protein of a two-component signal transduction system in plants and a nucleic acid coding therefor are disclosed. The present invention provided an isolated protein having the amino acid sequence shown in SEQ ID NO:1 in the Sequence Listing or an amino acid sequence having a homology of not less than 30% to the amino acid sequence shown in SEQ ID NO:1, which functions as a regulator protein in a plant, and a nucleic acid coding therefor.Type: GrantFiled: July 21, 1999Date of Patent: August 12, 2003Assignee: Japan Tobacco Inc.Inventors: Tatsuo Sugiyama, Hitoshi Sakakibara, Chika Ito, Megumi Suzuki
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Patent number: 5571820Abstract: Endo-N-(8-methyl-8-azabicyclo[3.2.1]oct-3-yl)-1 -isopropyl-2(1H)-quinolone-3-carboxamide shown by formula (I): ##STR1## or an acid addition salt thereof exhibits a potent action for stimulating a serotonin 4 receptor and is effective for the treatment of diseases and for the improvement of conditions, caused by a reduced motility in the gastrointestinal tract.Type: GrantFiled: April 28, 1995Date of Patent: November 5, 1996Assignee: Taisho Pharmaceutical Co., Ltd.Inventors: Yutaka Ohuchi, Masaji Suzuki, Hajime Asanuma, Sadakazu Yokomori, Katsuo Hatayama, Yoshihiko Isobe, Chika Ito, Makoto Muramatsu