Patents by Inventor Takahiro Tomita

Takahiro Tomita 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).

  • Publication number: 20220212941
    Abstract: A method for producing a zeolite with improved Si/Al according to the present invention includes the steps of: subjecting a zeolite synthesized without using an organic structure directing agent to ion exchange, thereby obtaining a sodium-type, a proton-type, or an ammonium-type zeolite; and bringing the zeolite subjected to ion exchange into contact with an ammonium salt solution, thereby dealuminating the zeolite. It is preferable that the ammonium salt is any one of ammonium oxalate, ammonium fluoride, ammonium fluorosilicate, ammonium fluoroborate, ammonium fluorophosphate, ammonium fluorotitanate, and ammonium florozirconate. It is also preferable that the zeolite after ion exchange is exposed to water vapor, and is then brought into contact with the ammonium salt solution.
    Type: Application
    Filed: June 29, 2020
    Publication date: July 7, 2022
    Inventors: Yuichi SENOO, Katsuhiko HAYASHI, Junki TOMITA, Takahiro KOGAWA, Akihiro KANNO
  • Publication number: 20220203344
    Abstract: Provided is a beta zeolite satisfying P>76.79Q?29.514 in a range in which Q is less than 0.4011 nm, wherein, P represents an AB value that is an intensity ratio of A to B, A represents a diffraction intensity of a main peak of the beta zeolite observed by X-ray diffraction measurement, B represents a diffraction intensity of the (116) plane of ?-alumina obtained by X-ray diffraction measurement under the same conditions as those for the X-ray diffraction measurement on the beta zeolite, the ?-alumina being the standard substance 674a distributed by the American National Institute of Standards and Technology, and Q represents a lattice interplanar spacing of the main peak of the beta zeolite observed by X-ray diffraction measurement. It is preferable that the formula (1) above is satisfied in a range in which Q is from 0.3940 to 0.4000 nm.
    Type: Application
    Filed: June 29, 2020
    Publication date: June 30, 2022
    Inventors: Yuichi SENOO, Katsuhiko HAYASHI, Junki TOMITA, Takahiro KOGAWA, Akihiro KANNO
  • Patent number: 11365158
    Abstract: A honeycomb structure has a plurality of cells formed by a plurality of partition walls. The partition walls are formed of a porous material composed predominantly of cordierite. Each partition wall includes surface layer portions having a porosity of 50% or more and an inside portion having a porosity of 50% or more, the surface layer portions being portions ranging respectively from opposite surfaces to a depth corresponding to 25% of the thickness of the partition wall, and the inside portion being the other portion. The surface layer portions and the inside portion both include pores having axial pore widths of less than 30 ?m and pores having axial pore widths of 30 ?m or more. A mean axial pore width in the surface layer portions is smaller than a mean axial pore width in the inside portion.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: June 21, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Toru Hayase, Shinji Suzuki, Shinpei Oshima, Takahiro Tomita
  • Patent number: 11365665
    Abstract: A porous material includes an aggregate, and a binding material that binds the aggregate together in a state where pores are formed. The porous material contains 0.1 to 10.0 mass % of an MgO component, 0.5 to 25.0 mass % of an Al2O3 component, and 5.0 to 45.0 mass % of an SiO2 component with respect to the mass of the whole porous material, and further contains 0.01 to 5.5 mass % of an Sr component in terms of SrO.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: June 21, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Yunie Izumi, Takahiro Tomita
  • Publication number: 20220134487
    Abstract: A joined body includes a junction target, an underlying layer, an electrode part, and a fixed layer. The conductive underlying layer is fixed on a surface of the junction target. The electrode part is fixed on the underlying layer. The conductive fixed layer is fixed on the underlying layer with the electrode part interposed therebetween. Respective porosities of the underlying layer and the fixed layer are each not higher than 10%.
    Type: Application
    Filed: October 18, 2021
    Publication date: May 5, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Shinji SUZUKI, Takafumi KIMATA, Takahiro TOMITA
  • Patent number: 11214521
    Abstract: A porous material includes aggregate particles and a binding material. In the aggregate particles, oxide films containing cristobalite are provided on surfaces of particle bodies that are silicon carbide particles or silicon nitride particles. The binding material contains cordierite and binds the aggregate particles together in a state where pores are provided therein. The mass ratio of the cordierite to the whole of the porous material is in the range of 10 to 40 mass %. The oxide films that exist between the particle bodies and the binding material have a thickness less than or equal to 0.90 ?m.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: January 4, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Mika Tsuboi, Yunie Izumi, Takahiro Tomita
  • Publication number: 20210341413
    Abstract: A gas sensor has a porous protective layer disposed on a surface of a sensor element. In this gas sensor, the porous protective layer includes ceramic particles and ceramic fibers. Further, the ceramic fibers are present in the porous protective layer over a range from a front surface to a back surface thereof.
    Type: Application
    Filed: July 8, 2021
    Publication date: November 4, 2021
    Inventors: Megumi FUJISAKI, Mika TAKEUCHI, Takahiro TOMITA
  • Publication number: 20210341234
    Abstract: A heat dissipation member dissipates heat generated at a heat source. The heat dissipation member may include a substrate having a porosity ratio of 5 volume % or less; and an inorganic porous layer disposed on a surface of the substrate, wherein the inorganic porous layer may have a porosity ratio ranging from 25 volume % or more to 85 volume % or less and have lower thermal conductivity than the substrate. In this heat dissipation member, 15 mass % or more of constituents of the inorganic porous layer may be alumina.
    Type: Application
    Filed: July 7, 2021
    Publication date: November 4, 2021
    Applicant: NGK Insulators, Ltd.
    Inventors: Megumi FUJISAKI, Takahiro TOMITA, Yusuke OSHITA
  • Publication number: 20210331450
    Abstract: A composite member may include an inorganic porous layer on a surface of metal. The inorganic porous layer may include ceramic fibers. The inorganic porous layer may be constituted of 15 mass % or more of an alumina constituent and 45 mass % or more of a titania constituent.
    Type: Application
    Filed: July 7, 2021
    Publication date: October 28, 2021
    Applicant: NGK Insulators, Ltd.
    Inventors: Megumi FUJISAKI, Takahiro TOMITA, Yusuke OSHITA
  • Patent number: 11071937
    Abstract: A ceramic porous body includes skeleton portions; and pore portions formed between the skeleton portions, the pore portions being capable of allowing a fluid to flow therethrough. In a cross section parallel to a flow direction of the fluid, the skeleton portions have a ratio of a skeleton length of 40 ?m or more of 15% or less in a direction orthogonal to the flow direction of the fluid.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: July 27, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Masaki Ishikawa, Takahiro Tomita, Kenji Morimoto
  • Publication number: 20210179496
    Abstract: A sensor element of a gas sensor includes: an element base which is a ceramic structured body including a detection part of detecting a target measurement gas component; and a protective layer which is a porous layer provided in at least a part of an outermost peripheral portion of the element base, wherein in the protective layer, numerous convex parts each having a size of 1.0 ?m or less and made up of ceramic microparticles with diameters of 10 nm to 1.0 ?m are discretely formed around numerous ceramic coarse grains having diameters of 5.0 ?m to 40 ?m, the respective ceramic coarse grains are connected to each other directly or via the ceramic microparticle, and a degree of porosity of the protective layer is 5% to 50%.
    Type: Application
    Filed: February 24, 2021
    Publication date: June 17, 2021
    Inventors: Megumi FUJISAKI, Mika TAKEUCHI, Takahiro TOMITA
  • Publication number: 20210163372
    Abstract: A sensor element includes a ceramic layered body having a zirconia layer part and two alumina layer parts provided on both surfaces of the zirconia layer part, respectively, and a plurality of electrodes provided in the ceramic layered body. At least one of the two alumina layer parts contains Ti element, the zirconia layer part has a layer containing Zr element and Ti element in the vicinity of an interface with the at least one alumina layer part, and the layer contains Ti element in an amount from 0.05 to 5.0 mass %.
    Type: Application
    Filed: February 10, 2021
    Publication date: June 3, 2021
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kousuke UJIHARA, Megumi FUJISAKI, Takahiro TOMITA
  • Publication number: 20210156817
    Abstract: A sensor element of a gas sensor includes: an element base which is a ceramic structured body including a detection part of detecting a target measurement gas component; an outer protective layer which is a porous layer provided in at least a part of an outermost peripheral portion of the element base; and an inner protective layer which is a porous layer having a degree of porosity of 30% to 85%, which is larger than a degree of porosity of the outer protective layer, inside the outer protective layer, wherein an average fine pore diameter of the inner protective layer is equal to or larger than 0.5 ?m and equal to or smaller than 5.0 ?m.
    Type: Application
    Filed: February 5, 2021
    Publication date: May 27, 2021
    Inventors: Megumi FUJISAKI, Mika TAKEUCHI, Takahiro TOMITA
  • Patent number: 10933560
    Abstract: An intermediate member is a member which is directly or indirectly sandwiched between a first object and a second object. The intermediate member includes a plate-like supporting member having a lower surface which is one main surface opposed to the first object and a plurality of ceramic blocks fixed on an upper surface which is the other main surface of the supporting member in a state of being separated from one another. Thus, in a state where the plurality of ceramic blocks are collectively held by the supporting member having relatively high shape retention, by disposing the intermediate member between the objects, it is possible to easily arrange the plurality of ceramic blocks between the objects with high positioning accuracy.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: March 2, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Akinobu Oribe, Takahiro Tomita
  • Patent number: 10888856
    Abstract: A honeycomb structure including: a pillar-shaped honeycomb structure portion having an outer peripheral wall and partition walls disposed on an inner side of the outer peripheral wall and defining a plurality of cells extending from one end face to another end face to form flow paths; and at least an electrode portion disposed on an outer surface of the outer peripheral wall of the pillar-shaped honeycomb structure portion, wherein the pillar-shaped honeycomb structure portion is formed of ceramics containing either or both of Si and SiC, the electrode portion contains either or both of a metal and a metal compound in addition to an oxide, and a volume ratio of the oxide on an inner peripheral side of the electrode portion is higher than a volume ratio of the oxide on an outer peripheral side of the electrode portion.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: January 12, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Takefumi Kimata, Takahiro Tomita
  • Publication number: 20200309002
    Abstract: A particulate filter, including: a pillar-shaped honeycomb structure portion having a plurality of first cells extending from a first end face to a second end face, the first end face being open and the second end face being plugged, and a plurality of second cells extending from the first end face to the second end face, the first end face being plugged and the second end face being open, in which the first cells and the second cells are alternately arranged adjacent to each other with porous partition walls interposed therebetween; and a low thermal conductive layer covering a part or the whole of an outer peripheral side surface of the pillar-shaped honeycomb structure portion, the thermal conductivity in a thickness direction of the low thermal conductive layer being 0.6 W/(m·K) or less.
    Type: Application
    Filed: March 9, 2020
    Publication date: October 1, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yukio Miyairi, Takahiro Tomita, Megumi Fujisaki
  • Publication number: 20200308068
    Abstract: A honeycomb structure has a plurality of cells formed by a plurality of partition walls. The partition walls are formed of a porous material composed predominantly of cordierite. Each partition wall includes surface layer portions having a porosity of 50% or more and an inside portion having a porosity of 50% or more, the surface layer portions being portions ranging respectively from opposite surfaces to a depth corresponding to 25% of the thickness of the partition wall, and the inside portion being the other portion. The surface layer portions and the inside portion both include pores having axial pore widths of less than 30 ?m and pores having axial pore widths of 30 ?m or more. A mean axial pore width in the surface layer portions is smaller than a mean axial pore width in the inside portion.
    Type: Application
    Filed: March 18, 2020
    Publication date: October 1, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Toru HAYASE, Shinji SUZUKI, Shinpei OSHIMA, Takahiro TOMITA
  • Patent number: 10745326
    Abstract: A porous ceramic structure includes one sheet, and a plurality of porous ceramic particles bonded on the sheet. A gap d formed between adjacent ones of the porous ceramic particles is 10˜80 ?m.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: August 18, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Akinobu Oribe, Takahiro Tomita, Hiroharu Kobayashi
  • Patent number: 10611696
    Abstract: A porous ceramic structure has a porous ceramic aggregate configured from a plurality of porous ceramic particles, and the ratio of the number of corners at locations where two other porous ceramic particles are facing a corner of a porous ceramic particle with respect to the number of corners of the porous ceramic particles included in the porous ceramic aggregate is 80% or greater.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: April 7, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Akinobu Oribe, Takahiro Tomita, Hiroharu Kobayashi
  • Patent number: 10597336
    Abstract: A porous ceramic structure has a porosity of 20% to 99%, and includes one principal surface and another principal surface opposite to the one principal surface. At least one cut is formed from the one principal surface toward the other principal surface. An aspect ratio of a divided portion divided by the cut is greater than or equal to 3.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: March 24, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Hiroharu Kobayashi, Takahiro Tomita, Akinobu Oribe