Patents by Inventor Takafumi Kimata

Takafumi Kimata 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: 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
  • Publication number: 20210388749
    Abstract: A pillar shaped honeycomb structure, including: an outer peripheral wall; and a porous partition wall disposed inside the outer peripheral wall, the a porous partition wall defining a plurality of cells, each of the cells extending from one end face to other end face to form a flow path, wherein a surface of the porous partition wall in the cells comprise a collecting layer having an average pore diameter lower than that of the porous partition wall; and wherein magnetic particles having a Curie point of 700° C. or higher are provided either or both between the surfaces of the porous partition wall and the collecting layer, and on the collecting layer.
    Type: Application
    Filed: August 30, 2021
    Publication date: December 16, 2021
    Applicant: NGK Insulators, Ltd.
    Inventors: Takafumi KIMATA, Yukio MIYAIRI, Masaaki MASUDA, Kazuya HOSODA
  • Publication number: 20210346880
    Abstract: A pillar shaped honeycomb structure, including: an outer peripheral wall; and a porous partition wall disposed inside the outer peripheral wall, the partition wall defining a plurality of cells, each of the cells extending from one end face to other end face to form a flow path, wherein the plurality of cells include two or more types of magnetic substances in which at least two of a maximum magnetic permeability, a Curie point, and an intrinsic resistance value are different.
    Type: Application
    Filed: July 21, 2021
    Publication date: November 11, 2021
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yukio MIYAIRI, Masaaki MASUDA, Kyohei KATO, Kazuya HOSODA, Takafumi KIMATA
  • Publication number: 20210324772
    Abstract: A pillar shaped honeycomb structure, including: an outer peripheral wall; and porous partition walls disposed inside the outer peripheral wall, the partition walls defining a plurality of cells, each of the cells penetrating from one end face to other end face to form a flow path, wherein one or both of the one end face and the other end face includes a groove portion; and wherein at least one annular conductive loop containing a conductive material is embedded in the groove portion.
    Type: Application
    Filed: June 28, 2021
    Publication date: October 21, 2021
    Applicant: NGK INSULATORS, LTD.
    Inventors: Yukio MIYAIRI, Masaaki MASUDA, Kyohei KATO, Takafumi KIMATA, Kazuya HOSODA
  • Publication number: 20200385275
    Abstract: A SiC powder containing 70% by mass or more of a ?-SiC, wherein in a volume-based cumulative particle size distribution measured by a laser diffraction method, a D50 is 8 to 35 ?m and a D10 is 5 ?m or more.
    Type: Application
    Filed: May 28, 2020
    Publication date: December 10, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Takafumi KIMATA, Soichiro AOYAGI, Kisuke YAMAMOTO
  • Patent number: 10632648
    Abstract: A ceramic formed body extrusion method for forming a ceramic formed body having a wall-shaped or plate-shaped formed portion by using an extrusion die provided with a slit for extrusion of a ceramic formed body from a raw material for forming, the slit including a slit former stage unit located on an upstream side in an extrusion direction in the extrusion and a slit latter stage unit located on a downstream side in the extrusion direction, the slit latter stage unit having a width of three to 27 times a width of the slit former stage unit, and by extruding a raw material containing a first particle having an aspect ratio of two or more and less than 300 such that the raw material passes though the slit former stage unit of the extrusion die and then passes through the slit latter stage unit.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: April 28, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Takafumi Kimata, Kenichi Hidaka, Yoshio Kikuchi, Masaki Ishikawa, Kisuke Yamamoto, Kenji Morimoto
  • Patent number: 10596722
    Abstract: A ceramic formed body extrusion method for forming a ceramic formed body having a wall-shaped or plate-shaped formed portion by using an extrusion die provided with a slit for extrusion of a ceramic formed body from a raw material for forming, the slit including a slit former stage unit located on an upstream side in an extrusion direction in the extrusion and a slit latter stage unit located on a downstream side in the extrusion direction, the slit latter stage unit having a width of three to 27 times a width of the slit former stage unit, and by extruding a raw material containing a first particle having an aspect ratio of two or more and less than 300 such that the raw material passes though the slit former stage unit of the extrusion die and then passes through the slit latter stage unit.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: March 24, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Takafumi Kimata, Kenichi Hidaka, Yoshio Kikuchi, Masaki Ishikawa, Kisuke Yamamoto, Kenji Morimoto
  • Publication number: 20190351578
    Abstract: A ceramic formed body extrusion method for forming a ceramic formed body having a wall-shaped or plate-shaped formed portion by using an extrusion die provided with a slit for extrusion of a ceramic formed body from a raw material for forming, the slit including a slit former stage unit located on an upstream side in an extrusion direction in the extrusion and a slit latter stage unit located on a downstream side in the extrusion direction, the slit latter stage unit having a width of three to 27 times a width of the slit former stage unit, and by extruding a raw material containing a first particle having an aspect ratio of two or more and less than 300 such that the raw material passes though the slit former stage unit of the extrusion die and then passes through the slit latter stage unit.
    Type: Application
    Filed: July 30, 2019
    Publication date: November 21, 2019
    Applicant: NGK Insulators, Ltd.
    Inventors: Takafumi KIMATA, Kenichi HIDAKA, Yoshio KIKUCHI, Masaki ISHIKAWA, Kisuke YAMAMOTO, Kenji MORIMOTO
  • Publication number: 20190351577
    Abstract: A ceramic formed body extrusion method for forming a ceramic formed body having a wall-shaped or plate-shaped formed portion by using an extrusion die provided with a slit for extrusion of a ceramic formed body from a raw material for forming, the slit including a slit former stage unit located on an upstream side in an extrusion direction in the extrusion and a slit latter stage unit located on a downstream side in the extrusion direction, the slit latter stage unit having a width of three to 27 times a width of the slit former stage unit, and by extruding a raw material containing a first particle having an aspect ratio of two or more and less than 300 such that the raw material passes though the slit former stage unit of the extrusion die and then passes through the slit latter stage unit.
    Type: Application
    Filed: July 30, 2019
    Publication date: November 21, 2019
    Applicant: NGK Insulators, Ltd.
    Inventors: Takafumi KIMATA, Kenichi HIDAKA, Yoshio KIKUCHI, Masaki ISHIKAWA, Kisuke YAMAMOTO, Kenji MORIMOTO
  • Patent number: 10421213
    Abstract: A ceramic formed body extrusion method for forming a ceramic formed body having a wall-shaped or plate-shaped formed portion by using an extrusion die provided with a slit for extrusion of a ceramic formed body from a raw material for forming, the slit including a slit former stage unit located on an upstream side in an extrusion direction in the extrusion and a slit latter stage unit located on a downstream side in the extrusion direction, the slit latter stage unit having a width of three to 27 times a width of the slit former stage unit, and by extruding a raw material containing a first particle having an aspect ratio of two or more and less than 300 such that the raw material passes though the slit former stage unit of the extrusion die and then passes through the slit latter stage unit.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: September 24, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Takafumi Kimata, Kenichi Hidaka, Yoshio Kikuchi, Masaki Ishikawa, Kisuke Yamamoto, Kenji Morimoto
  • Patent number: 10252948
    Abstract: A method for manufacturing a plugged honeycomb structure, includes: a forming raw material preparation step of mixing and kneading a partition wall base material raw material at least including cordierite powder and binder with water to obtain a partition wall base material forming raw material; a forming/drying step of forming the partition wall base material forming raw material to obtain a honeycomb formed body, and drying the honeycomb formed body to obtain a honeycomb dried body; a slurry application step of applying trapping layer forming slurry including a cordierite forming raw material or alumina to a surface of a not-fired partition wall base material of the obtained honeycomb dried body; a firing step of firing the slurry-applied honeycomb dried body; and a plugging step of disposing a plugging portion at open ends of predetermined cells of the slurry-applied honeycomb dried body or of the honeycomb fired body.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: April 9, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Yoshio Kikuchi, Takafumi Kimata
  • Publication number: 20170282402
    Abstract: A ceramic formed body extrusion method for forming a ceramic formed body having a wall-shaped or plate-shaped formed portion by using an extrusion die provided with a slit for extrusion of a ceramic formed body from a raw material for forming, the slit including a slit former stage unit located on an upstream side in an extrusion direction in the extrusion and a slit latter stage unit located on a downstream side in the extrusion direction, the slit latter stage unit having a width of three to 27 times a width of the slit former stage unit, and by extruding a raw material containing a first particle having an aspect ratio of two or more and less than 300 such that the raw material passes though the slit former stage unit of the extrusion die and then passes through the slit latter stage unit.
    Type: Application
    Filed: March 28, 2017
    Publication date: October 5, 2017
    Applicant: NGK INSULATORS, LTD.
    Inventors: Takafumi KIMATA, Kenichi HIDAKA, Yoshio KIKUCHI, Masaki ISHIKAWA, Kisuke YAMAMOTO, Kenji MORIMOTO
  • Patent number: 9506384
    Abstract: There is disclosed a plugged honeycomb structure. A plugged honeycomb structure includes a pillar-shaped honeycomb structure body having porous partition walls defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, and plugging portions disposed in open ends of predetermined cells in the first end face and open ends of residual cells in the second end face, and the partition walls are constituted of a porous body including ?-Al2O3 as a main phase and further including aluminum titanate and glass.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: November 29, 2016
    Assignee: NGK Insulators, Ltd.
    Inventors: Yoshio Kikuchi, Takafumi Kimata
  • Patent number: 9487448
    Abstract: A honeycomb structure including a pillar-shaped honeycomb structure body having partition walls defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, the partition walls include a porous body having refractory aggregates and a bonding material which bonds the refractory aggregates to each other, the bonding material includes metal Si and an oxide material, porosity of the porous body constituting the partition walls is 25% or more and 70% or less, a ratio of a mass of the bonding material to a mass of the whole porous body is 30 mass % or more and 50 mass % or less, and a ratio of a mass of the oxide material to the mass of the bonding material is 30 mass % or more and 80 mass % or less.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: November 8, 2016
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukio Miyairi, Yoshio Kikuchi, Takafumi Kimata
  • Publication number: 20160272547
    Abstract: A method for manufacturing a plugged honeycomb structure, includes: a forming raw material preparation step of mixing and kneading a partition wall base material raw material at least including cordierite powder and binder with water to obtain a partition wall base material forming raw material; a forming/drying step of forming the partition wall base material forming raw material to obtain a honeycomb formed body, and drying the honeycomb formed body to obtain a honeycomb dried body; a slurry application step of applying trapping layer forming slurry including a cordierite forming raw material or alumina to a surface of a not-fired partition wall base material of the obtained honeycomb dried body; a firing step of firing the slurry-applied honeycomb dried body; and a plugging step of disposing a plugging portion at open ends of predetermined cells of the slurry-applied honeycomb dried body or of the honeycomb fired body.
    Type: Application
    Filed: March 15, 2016
    Publication date: September 22, 2016
    Inventors: Yoshio KIKUCHI, Takafumi KIMATA
  • Publication number: 20150266779
    Abstract: There is disclosed a honeycomb structure. A honeycomb structure includes a pillar-shaped honeycomb structure body having partition walls defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, the partition walls include a porous body having refractory aggregates and a bonding material which bonds the refractory aggregates to each other, the bonding material includes metal Si and an oxide material, porosity of the porous body constituting the partition walls is 25% or more and 70% or less, a ratio of a mass of the bonding material to a mass of the whole porous body is 30 mass % or more and 50 mass % or less, and a ratio of a mass of the oxide material to the mass of the bonding material is 30 mass % or more and 80 mass % or less.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 24, 2015
    Inventors: Yukio MIYAIRI, Yoshio KIKUCHI, Takafumi KIMATA
  • Publication number: 20150260065
    Abstract: There is disclosed a plugged honeycomb structure. A plugged honeycomb structure includes a pillar-shaped honeycomb structure body having porous partition walls defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, and plugging portions disposed in open ends of predetermined cells in the first end face and open ends of residual cells in the second end face, and the partition walls are constituted of a porous body including ?-Al2O3 as a main phase and further including aluminum titanate and glass.
    Type: Application
    Filed: February 13, 2015
    Publication date: September 17, 2015
    Inventors: Yoshio KIKUCHI, Takafumi KIMATA
  • Patent number: 8945390
    Abstract: A carbon membrane formed by carbonizing a phenol resin having at least one kind of atomic groups among a methylene bond, a dimethylene ether bond, and a methylol group, wherein the total mole content of the atomic groups is 100 to 180% with respect to the phenolic nuclei. A pervaporation separation method using the carbon membrane is also disclosed.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: February 3, 2015
    Assignee: NGK Insulators, Ltd.
    Inventors: Akimasa Ichikawa, Kenji Suzuki, Naoto Kinoshita, Yoshinori Isoda, Takafumi Kimata
  • Patent number: 8877099
    Abstract: The present invention provides a Ti3SiC2 based material that exhibits excellent arc resistance, an electrode, a spark plug, and methods of manufacturing the same. A Ti3SiC2 based material according to the present invention includes Ti3SiC2 as a main phase, the Ti3SiC2 based material having a TiC content of 0.5 mass % or less and an open porosity of 0.5% or less. It may be preferable that 0 to 30 mol % of Si in the main phase Ti3SiC2 be substituted with Al. A spark plug according to the present invention includes an electrode formed using the Ti3SiC2 based material.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: November 4, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Tetsuya Hattori, Takafumi Kimata, Yoshimasa Kobayashi
  • Publication number: 20140199478
    Abstract: Provided is a method of producing a carbon membrane including dipping a porous support in a suspension of a phenolic resin or a suspension of a phenolic resin precursor, drying the resulting support to form a membrane made of the phenolic resin or the phenolic resin precursor, and heat treating and thereby carbonizing the resulting membrane into a carbon membrane.
    Type: Application
    Filed: March 17, 2014
    Publication date: July 17, 2014
    Applicant: NGK Insulators, Ltd.
    Inventors: Akimasa ICHIKAWA, Tetsuya SAKAI, Naoto KINOSHITA, Yoshinori ISODA, Takafumi KIMATA