Patents by Inventor Kazutoshi Isomura
Kazutoshi Isomura 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: 10422060Abstract: A holding material including: inorganic fibers that include 70 wt % or more of an alumina component an organic binder other than polyacrylamide of which the surface is negatively charged, alumina sol, and polyacrylamide having a weight-average molecular weight of 3,000,000 to 6,000,000, wherein the amount of the alumina sol is 2 to 8 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers, and the amount of the polyacrylamide is 0.01 to 1.0 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers.Type: GrantFiled: February 25, 2016Date of Patent: September 24, 2019Assignee: NICHIAS CORPORATIONInventors: Akihiro Nakashima, Kazutoshi Isomura, Hiroki Nakamura, Yuki Takeda
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Patent number: 10138775Abstract: A holding material includes a stack of a first mat and a second mat, the first mat including alumina fibers that include 60 wt % or more of alumina and 40 wt % or less of silica, and the second mat including silica fibers that include 60 wt % or more of silica and 40 wt % or less of alumina and having a surface pressure higher than that of the first mat as measured at a gap bulk density of 0.30 g/cm3.Type: GrantFiled: June 11, 2015Date of Patent: November 27, 2018Assignee: NICHIAS CORPORATIONInventors: Kazutoshi Isomura, Hiroki Nakamura, Kiyoshi Sato, Isami Abe
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Publication number: 20180038024Abstract: A holding material including: inorganic fibers that include 70 wt % or more of an alumina component an organic binder other than polyacrylamide of which the surface is negatively charged, alumina sol, and polyacrylamide having a weight-average molecular weight of 3,000,000 to 6,000,000, wherein the amount of the alumina sol is 2 to 8 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers, and the amount of the polyacrylamide is 0.01 to 1.0 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers.Type: ApplicationFiled: February 25, 2016Publication date: February 8, 2018Applicant: NICHIAS CORPORATIONInventors: Akihiro NAKASHIMA, Kazutoshi ISOMURA, Hiroki NAKAMURA, Yuki TAKEDA
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Patent number: 9796634Abstract: Provided are a holding material for a gas treatment device, which is inexpensive, has a simple structure, and exhibits high holding force, a gas treatment device, and a method for manufacturing the same. A holding material for a gas treatment device according to the present invention is a holding material, which is a holding material to be arranged, in a gas treatment device including a treatment structure and a casing for housing the treatment structure, between the treatment structure and the casing, the holding material including silica fibers and an alumina sol in an amount of 3 parts by mass or more in terms of a solid content with respect to 100 parts by mass of the silica fibers.Type: GrantFiled: November 14, 2012Date of Patent: October 24, 2017Assignee: NICHIAS CORPORATIONInventors: Junya Satoh, Nobuya Tomosue, Kazutoshi Isomura, Kiyoshi Sato, Tadashi Sakane, Hiroki Nakamura
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Publication number: 20170138234Abstract: A holding material includes a stack of a first mat and a second mat, the first mat including alumina fibers that include 60 wt % or more of alumina and 40 wt % or less of silica, and the second mat including silica fibers that include 60 wt % or more of silica and 40 wt % or less of alumina and having a surface pressure higher than that of the first mat as measured at a gap bulk density of 0.30 g/cm3.Type: ApplicationFiled: June 11, 2015Publication date: May 18, 2017Applicant: NICHIAS CORPORATIONInventors: Kazutoshi ISOMURA, Hiroki NAKAMURA, Kiyoshi SATO, Isami ABE
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Patent number: 9302947Abstract: Provided is a method for producing inorganic fiber including: preparing a spinning raw material liquid which comprises an aluminum source, a calcium source, a silicon source and a spinning auxiliary, in which the content of the spinning auxiliary is, in terms of solid matter, 3 parts by mass or more relative to 100 parts by mass of the total of the aluminum source, the calcium source and the silicon source; spinning the spinning raw material liquid by a sol-gel method to obtain crude inorganic fiber; and firing the crude inorganic fiber to produce inorganic fiber that comprises 35 mass % to 88 mass % of Al2O3, 3 mass % to 45 mass % of CaO and 5 mass % to 40 mass % of SiO2 in which the total of Al2O3, CaO and SiO2 is 97 mass % or more of the entire fiber.Type: GrantFiled: January 21, 2013Date of Patent: April 5, 2016Assignee: NICHIAS CORPORATIONInventors: Nobuya Tomosue, Kazutoshi Isomura, Kazutaka Murayama, Kiyoshi Sato
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Publication number: 20150210598Abstract: Inorganic fibers including 43.2 to 53.0 mol % of Al2O3, 12.8 to 25.2 mol % of SiO2 and 26.0 to 40.0 mol % of CaO, with the total of these components being 98 mol % or more.Type: ApplicationFiled: August 27, 2013Publication date: July 30, 2015Applicant: NICHIAS CORPORATIONInventors: Nobuya Tomosue, Kazutoshi Isomura, Kazutaka Murayama, Kiyoshi Sato
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Publication number: 20150033714Abstract: Provided are a holding material for a gas treatment device, which is inexpensive, has a simple structure, and exhibits high holding force, a gas treatment device, and a method for manufacturing the same. A holding material for a gas treatment device according to the present invention is a holding material, which is a holding material to be arranged, in a gas treatment device including a treatment structure and a casing for housing the treatment structure, between the treatment structure and the casing, the holding material including silica fibers and an alumina sol in an amount of 3 parts by mass or more in terms of a solid content with respect to 100 parts by mass of the silica fibers.Type: ApplicationFiled: November 14, 2012Publication date: February 5, 2015Applicant: NICHIAS CORPORATIONInventors: Junya Satoh, Nobuya Tomosue, Kazutoshi Isomura, Kiyoshi Sato, Tadashi Sakane, Hiroki Nakamura
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Publication number: 20150038320Abstract: Provided is a method for producing inorganic fiber including: preparing a spinning raw material liquid which comprises an aluminum source, a calcium source, a silicon source and a spinning auxiliary, in which the content of the spinning auxiliary is, in terms of solid matter, 3 parts by mass or more relative to 100 parts by mass of the total of the aluminum source, the calcium source and the silicon source; spinning the spinning raw material liquid by a sol-gel method to obtain crude inorganic fiber; and firing the crude inorganic fiber to produce inorganic fiber that comprises 35 mass % to 88 mass % of Al2O3, 3 mass % to 45 mass % of CaO and 5 mass % to 40 mass % of SiO2 in which the total of Al2O3, CaO and SiO2 is 97 mass % or more of the entire fiber.Type: ApplicationFiled: January 21, 2013Publication date: February 5, 2015Inventors: Nobuya Tomosue, Kazutoshi Isomura, Kazutaka Murayama, Kiyoshi Sato
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Patent number: 8394333Abstract: A holding material for a catalytic converter including a catalyst carrier having an elliptical cross section, a metal casing for receiving the catalyst carrier, and the holding material mounted on the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, in which the holding material has a first portion and a second portion, and the first portion in contact with a region of the catalyst carrier, corresponding to 40 to 95% of a major axis centering on an intersection of an ellipse and a minor axis in the elliptical cross section of the catalyst carrier, is larger than the second portion in contact with any other region of the catalyst carrier in basis weight.Type: GrantFiled: December 9, 2009Date of Patent: March 12, 2013Assignee: Nichias CorporationInventors: Tadashi Sakane, Nobuya Tomosue, Kazutoshi Isomura
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Publication number: 20120313282Abstract: The present invention relates to a holding material for a catalyst converter, where the catalyst converter contains a catalyst carrier having a cross-section of a flattened shape, a metal casing to which the catalyst carrier is received, and the holding material attached to the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, in which the holding material has a first part positioned in a minor axis direction of a cross-section of the catalyst carrier and having a high basis weight, a second part positioned in a major axis direction of the cross-section of the catalyst carrier and having a low basis weight, and a third part having a basis weight gradually decreased toward the second part from the first part.Type: ApplicationFiled: February 8, 2011Publication date: December 13, 2012Inventors: Tadashi Sakane, Nobuya Tomosue, Kazutoshi Isomura, Yoshikazu Shinpo, Atsushi Inomata
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Patent number: 8197766Abstract: The present invention relates to a holding material for a catalytic converter including a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, the holding material having a plurality of high-density sites which are spaced apart from one another in the holding material, each site having a higher density than sites of the holding material in which the higher density sites are not provided.Type: GrantFiled: August 8, 2008Date of Patent: June 12, 2012Assignee: Nichias CorporationInventors: Nobuya Tomosue, Junya Sato, Kazutoshi Isomura
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Patent number: 8128882Abstract: The present invention relates to a holding material for a catalytic converter including a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, the holding material including a low thermal conductivity layer, in which the low thermal conductivity layer includes: a molded material containing an inorganic powder; or a composite material of a porous substrate with an aerogel.Type: GrantFiled: July 18, 2008Date of Patent: March 6, 2012Assignee: Nichias CorporationInventors: Nobuya Tomosue, Kazutoshi Isomura, Tadashi Sakane
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Publication number: 20110158863Abstract: The present invention relates to a holding material for a catalytic converter containing a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, in which the holding material contains an organic substrate and a protective film having a plurality of pores, and the protective film is joined to a metal casing-side surface of the substrate.Type: ApplicationFiled: December 28, 2010Publication date: June 30, 2011Applicant: NICHIAS CORPORATIONInventors: Nobuya TOMOSUE, Kazutoshi Isomura, Junya Satoh
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Publication number: 20100143212Abstract: The present invention relates to a holding material for a catalytic converter including a catalyst carrier having an elliptical cross section, a metal casing for receiving the catalyst carrier, and the holding material mounted on the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, in which the holding material has a first portion and a second portion, and the first portion in contact with a region of the catalyst carrier, corresponding to 40 to 95% of a major axis centering on an intersection of an ellipse and a minor axis in the elliptical cross section of the catalyst carrier, is larger than the second portion in contact with any other region of the catalyst carrier in basis weight.Type: ApplicationFiled: December 9, 2009Publication date: June 10, 2010Inventors: Tadashi SAKANE, Nobuya Tomosue, Kazutoshi Isomura
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Publication number: 20090041638Abstract: The present invention relates to a holding material for a catalytic converter including a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, the holding material having a plurality of high-density sites which are spaced apart from one another in the holding material, each site having a higher density than sites of the holding material in which the higher density sites are not provided.Type: ApplicationFiled: August 8, 2008Publication date: February 12, 2009Applicant: NICHIAS CORPORATIONInventors: Nobuya Tomosue, Junya Sato, Kazutoshi Isomura
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Publication number: 20090022633Abstract: The present invention relates to a holding material for a catalytic converter including a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, the holding material including a low thermal conductivity layer, in which the low thermal conductivity layer includes: a molded material containing an inorganic powder; or a composite material of a porous substrate with an aerogel.Type: ApplicationFiled: July 18, 2008Publication date: January 22, 2009Applicant: NICHIAS CORPORATIONInventors: Nobuya TOMOSUE, Kazutoshi Isomura, Tadashi Sakane