Patents by Inventor Akiko Koga
Akiko Koga 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: 20220389270Abstract: An aqueous surface-treating agent comprising (A) an aqueous emulsion of silicone oil, (B) a silanol-modified polyurethane resin, (C) a silane compound and/or a partial hydrolysate thereof, (D) an aqueous emulsion of a hydrazide and a carbonyl group-containing polyurethane resin, and (E) an aqueous emulsion of a polyurethane resin having a glass transition temperature of ?30° C. or lower, and a thermal softening temperature of 70° C. or lower measured by using a flow tester when heated from 40° C. to 150° C. at a heating rate of 5° C./min. The aqueous surface-treating agent contains silicone oil for preventing sticking between products and a silanol-modified polyurethane resin binder having a low hardness and excellent adhesiveness to seal members, and improves the corrosion resistance of an aqueous surface-treating agent for aluminum substrates etc.Type: ApplicationFiled: October 7, 2020Publication date: December 8, 2022Applicants: NOK CORPORATION, NOK KLUBER CO., LTD.Inventors: Akiko KOGA, Naoki KAMEDA, Masaki TAHARA
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Patent number: 11009130Abstract: In an exemplary embodiment, a sliding component includes an annular stationary side seal ring 5 fixed to the stationary side and an annular rotating side seal ring 3 to be rotated together with a rotating shaft, in which by relatively rotating opposing sealing faces S of the stationary side seal ring 5 and the rotating side seal ring 3, a silicate-containing sealed fluid present on one side in the radial direction of the relatively rotating sealing faces S is sealed, wherein an amorphous carbon film 8 formed by using a hydrocarbon gas containing no silicon compound is provided on at least any one of the sealing faces S of the stationary side seal ring 5 and the rotating side seal ring 3, and content of silicon of the amorphous carbon film 8 is 1.5 at % or less.Type: GrantFiled: September 29, 2017Date of Patent: May 18, 2021Assignees: EAGLE INDUSTRY CO., LTD., NOK CORPORATIONInventors: Masatoshi Itadani, Kazumasa Sunagawa, Tetsuzo Okada, Keiichi Chiba, Kenji Kiryu, Tadahiro Kimura, Akiko Koga
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Publication number: 20200270414Abstract: A sealing member includes: a rubber base material; and a coating provided on the rubber base material and having a melting point of 50° C. or higher, wherein the coating contains a polymer containing an acrylic acid ester containing a perfluoroalkyl group or a methacrylic acid ester containing a perfluoroalkyl group, as a monomer.Type: ApplicationFiled: May 12, 2020Publication date: August 27, 2020Applicant: NOK CORPORATIONInventors: Akiko KOGA, Norihiro HAMADA, Taisuke MATSUDA, Tetsushi KIJIMA
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Publication number: 20200182356Abstract: In an exemplary embodiment, a sliding component includes an annular stationary side seal ring 5 fixed to the stationary side and an annular rotating side seal ring 3 to be rotated together with a rotating shaft, in which by relatively rotating opposing sealing faces S of the stationary side seal ring 5 and the rotating side seal ring 3, a silicate-containing sealed fluid present on one side in the radial direction of the relatively rotating sealing faces S is sealed, wherein an amorphous carbon film 8 formed by using a hydrocarbon gas containing no silicon compound is provided on at least any one of the sealing faces S of the stationary side seal ring 5 and the rotating side seal ring 3, and content of silicon of the amorphous carbon film 8 is 1.5 at % or less.Type: ApplicationFiled: September 29, 2017Publication date: June 11, 2020Inventors: Masatoshi ITADANI, Kazumasa SUNAGAWA, Tetsuzo OKADA, Keiichi CHIBA, Kenji KIRYU, Tadahiro KIMURA, Akiko KOGA
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Patent number: 10280977Abstract: In an embodiment, a slide component includes a circular ring-shaped stationary-side seal ring 5 fixed to a stationary side and a circular ring-shaped rotating-side seal ring 3 rotating with a rotating shaft 1, and relatively rotates respective opposed sliding faces S of the stationary-side seal ring 5 and the rotating-side seal ring 3, thereby sealing a sealed fluid present on one side in a radial direction of the sliding face relatively rotating and sliding, wherein the sealed fluid is a silicate containing fluid; and on at least either one sliding face of the stationary-side seal ring 5 and the rotating-side seal ring 3, an amorphous carbon film 10 formed by using hydrocarbon gas not containing organosilicon compound gas in a plasma CVD method is laminated. The slide component can seal a silicate containing sealed fluid to which silicate is added.Type: GrantFiled: April 7, 2016Date of Patent: May 7, 2019Assignees: EAGLE INDUSTRY CO., LTD, NOK CORPORATIONInventors: Masatoshi Itadani, Kazumasa Sunagawa, Tetsuzo Okada, Keiichi Chiba, Kenji Kiryu, Akiko Koga
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Patent number: 10094330Abstract: A rubber-metal laminated gasket material comprising a metal plate and fluororubber or nitrile rubber laminated on the metal plate, wherein an amorphous carbon film having a nanoindentation hardness on a silicon wafer of 10 GPa or more and a film thickness of 200 nm or more is formed on a rubber layer outer surface of the rubber-metal laminated gasket material by a plasma CVD method that supplies a high-frequency power from a high-frequency power source using unsaturated hydrocarbon gas. The rubber-metal laminated gasket material reduces the wear and abrasion of the gasket material due to friction with the seal mating surface under high temperature use.Type: GrantFiled: April 10, 2015Date of Patent: October 9, 2018Assignee: NOK CorporationInventors: Akiko Koga, Akihiro Suzuki
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Publication number: 20180112711Abstract: In an embodiment, a slide component includes a circular ring-shaped stationary-side seal ring 5 fixed to a stationary side and a circular ring-shaped rotating-side seal ring 3 rotating with a rotating shaft 1, and relatively rotates respective opposed sliding faces S of the stationary-side seal ring 5 and the rotating-side seal ring 3, thereby sealing a sealed fluid present on one side in a radial direction of the sliding face relatively rotating and sliding, wherein the sealed fluid is a silicate containing fluid; and on at least either one sliding face of the stationary-side seal ring 5 and the rotating-side seal ring 3, an amorphous carbon film 10 formed by using hydrocarbon gas not containing organosilicon compound gas in a plasma CVD method is laminated. The slide component can seal a silicate containing sealed fluid to which silicate is added.Type: ApplicationFiled: April 7, 2016Publication date: April 26, 2018Inventors: Masatoshi ITADANI, Kazumasa SUNAGAWA, Tetsuzo OKADA, Keiichi CHIBA, Kenji KIRYU, Akiko KOGA
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Patent number: 9737850Abstract: Provided is a novel palladium catalyst capable of efficiently purifying carbon monoxide (CO) and total hydrocarbons (THC) under a fuel-rich atmosphere even when palladium (Pd) is used as a catalyst active component. Proposed is a palladium monolayer catalyst for an exhaust gas from a saddle-riding-type vehicle, which is an exhaust gas purification catalyst for a saddle-riding-type vehicle to be installed in an exhaust gas passage in an internal combustion engine. The palladium monolayer catalyst includes a substrate, and a catalyst layer that has the form of a monolayer and contains palladium acting as a catalyst active component, an inorganic porous body acting as a catalyst carrier, ceria (CeO2) particles acting as a promoter component, and barium.Type: GrantFiled: September 12, 2012Date of Patent: August 22, 2017Assignees: Honda Motor Co., Ltd., Mitsui Mining & Smelting Co., Ltd.Inventors: Toshiaki Kimura, Hiroyuki Horimura, Akiko Koga, Motoki Ito, Masateru Tsuji, Takashi Wakabayashi, Yosuke Shibata, Yunosuke Nakahara, Kiyotaka Yasuda
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Publication number: 20170159837Abstract: A rubber-laminated sealing valve comprising a fluororubber layer and an amorphous carbon film that are sequentially laminated, wherein the amorphous carbon film is formed by a CVD plasma treatment method that supplies a high-frequency power from a high-frequency power source using hydrocarbon gas. The rubber-laminated sealing valve forms an amorphous carbon film having an indenter hardness of 5 GPa or more (corresponding to a Vickers hardness of about Hv 500 or more; when converted by Hv (kg/m2)=HIT (MPa)×0.0926 according to ISO 14577-1) on the surface of a rubber layer, wherein the rubber layer is non-adhesive to a mating material.Type: ApplicationFiled: July 9, 2015Publication date: June 8, 2017Inventor: Akiko KOGA
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Publication number: 20170037811Abstract: A rubber-metal laminated gasket material comprising a metal plate and fluororubber or nitrile rubber laminated on the metal plate, wherein an amorphous carbon film having a nanoindentation hardness on a silicon wafer of 10 GPa or more and a film thickness of 200 nm or more is formed on a rubber layer outer surface of the rubber-metal laminated gasket material by a plasma CVD method that supplies a high-frequency power from a high-frequency power source using unsaturated hydrocarbon gas. The rubber-metal laminated gasket material reduces the wear and abrasion of the gasket material due to friction with the seal mating surface under high temperature use.Type: ApplicationFiled: April 10, 2015Publication date: February 9, 2017Applicant: NOK CorporationInventors: Akiko Koga, Akihiro Suzuki
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Patent number: 9493569Abstract: Structural isomers in sc(Fv)2 compositions of anti-human Mpl antibody and humanized anti-human Mpl antibody were separated, and the obtained structural isomers were cleaved at their linkers to confirm that the structural isomers are of single chain diabody type and bivalent scFv type. In addition, the agonistic activities of these structural isomers were revealed to be significantly different. Furthermore, the present inventors discovered that the content ratio of the structural isomers in sc(Fv)2 compositions could be regulated by altering temperature, modifying lengths of the linkers of sc(Fv)2, or amino acids in their variable regions.Type: GrantFiled: March 31, 2006Date of Patent: November 15, 2016Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Tomoyuki Igawa, Hiroyuki Tsunoda, Akiko Koga, Yasufumi Kikuchi
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Publication number: 20150184749Abstract: A PTFE resin seal ring in which at least one surface of an abutting part that forms a discontinuous part of the seal ring is treated by plasma modification using non-polymerizable gas under pressure conditions of 10 to 500 Pa during plasma irradiation. Since the abutting surfaces of the PTFE resin seal ring are treated with low-pressure plasma, and the state of CF bonds in the surface portion is changed, sticking does not occur in the abutting part even after constant load is applied at a high temperature. Thus, the PTFE resin seal ring of the present invention exhibits excellent effects of ensuring sealing properties under pressure and slidability under ordinary pressure, and is effectively used as a sealing material in, for example, rotation or reciprocation, including hydraulic circuits such as automatic transmissions (A/T) and continuously variable transmissions (CVT) for vehicles.Type: ApplicationFiled: July 18, 2013Publication date: July 2, 2015Applicant: NOK CORPORATIONInventors: Kiyofumi Fukasawa, Akiko Koga, Akihiro Suzuki, Hideki Kuriyama
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Publication number: 20150176121Abstract: A PTFE resin seal ring in which an amorphous carbon film is formed on at least one surface of an abutting part that forms a discontinuous part of the seal ring. Since an amorphous carbon film is formed on the abutting surfaces of the PTFE resin seal ring, sticking does not occur in the abutting part even after constant load is applied at a high temperature. Thus, the PTFE resin seal ring of the present invention exhibits excellent effects of ensuring sealing properties under pressure and slidability under ordinary pressure, and is effectively used as sealing material in, for example, rotation or reciprocation, including hydraulic circuits such as automatic transmissions (A/T) and continuously variable transmissions (CVT) for vehicles.Type: ApplicationFiled: July 18, 2013Publication date: June 25, 2015Inventors: Kiyofumi Fukasawa, Akiko Koga, Akihiro Suzuki, Hideki Kuriyama
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Publication number: 20150086434Abstract: Provided is a novel palladium catalyst capable of efficiently purifying carbon monoxide (CO) and total hydrocarbons (THC) under a fuel-rich atmosphere even when palladium (Pd) is used as a catalyst active component. Proposed is a palladium monolayer catalyst for an exhaust gas from a saddle-riding-type vehicle, which is an exhaust gas purification catalyst for a saddle-riding-type vehicle to be installed in an exhaust gas passage in an internal combustion engine. The palladium monolayer catalyst includes a substrate, and a catalyst layer that has the form of a monolayer and contains palladium acting as a catalyst active component, an inorganic porous body acting as a catalyst carrier, ceria (CeO2) particles acting as a promoter component, and barium.Type: ApplicationFiled: September 12, 2012Publication date: March 26, 2015Applicants: MITSUI MINING & SMELTING CO., LTD., HONDA MOTOR CO., LTD.Inventors: Toshiaki Kimura, Hiroyuki Horimura, Akiko Koga, Motoki Ito, Masateru Tsuji, Takashi Wakabayashi, Yosuke Shibata, Yunosuke Nakahara, Kiyotaka Yasuda
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Publication number: 20090297501Abstract: Structural isomers in sc(Fv)2 compositions of anti-human Mpl antibody and humanized anti-human Mpl antibody were separated, and the obtained structural isomers were cleaved at their linkers to confirm that the structural isomers are of single chain diabody type and bivalent scFv type. In addition, the agonistic activities of these structural isomers were revealed to be significantly different. Furthermore, the present inventors discovered that the content ratio of the structural isomers in sc(Fv)2 compositions could be regulated by altering temperature, modifying lengths of the linkers of sc(Fv)2, or amino acids in their variable regions.Type: ApplicationFiled: March 31, 2006Publication date: December 3, 2009Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Tomoyuki Igawa, Hiroyuki Tsunoda, Akiko Koga, Yasufumi Kikuchi
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Publication number: 20030138870Abstract: The present invention provides a convenient and highly accurate method of measuring the biological activity of a ligand. Namely, this method of evaluating the binding activity of a ligand to a ligand-binding protein comprises; measuring the binding activity value of the ligand to the ligand-binding protein, and measuring the binding activity value of the above-described ligand to a second ligand-binding substance binding to a site other than the binding site where the ligand binds to the above-described ligand-binding protein.Type: ApplicationFiled: December 26, 2002Publication date: July 24, 2003Inventors: Megumi Tanaka, Masaya Kakuta, Akiko Koga, Keiko Esaki
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Publication number: 20030124119Abstract: A stabilized pharmaceutical preparation of an antibody to parathyroid hormone related peptide, wherein the antibody is dissolved in a buffer solution containing at least one buffer selected from the group consisting of acetic acid, citric acid, phosphoric acid, and salts thereof and is in the form of a solution of pH 5 to 8.Type: ApplicationFiled: June 26, 2002Publication date: July 3, 2003Inventors: Tadao Yamazaki, Akira Hayasaka, Akiko Koga