Patents by Inventor Fumihiko YOSHIOKA

Fumihiko YOSHIOKA 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: 20220305420
    Abstract: A honeycomb filter includes a honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion disposed at one end of the cells, wherein the plurality of cells are arranged in a square grid pattern along a first direction and a second direction in a section orthogonal to an extending direction of the cells, the shape in the section is a deformed square having a specific corner, the specific corner includes a first curved portion, a second curved portion, and a connecting portion, a radius of curvature R1 of the first curved portion and a radius of curvature R2 of the second curved portion are 40 to 80 ?m, respectively, and a center distance between a center of curvature O1 of the first curved portion and a center of curvature O2 of the second curved portion is 80 to 200 ?m.
    Type: Application
    Filed: December 2, 2021
    Publication date: September 29, 2022
    Applicant: NGK Insulators, Ltd.
    Inventors: Fumihiko YOSHIOKA, Yudai KURIMOTO
  • Publication number: 20220305422
    Abstract: A honeycomb filter includes a honeycomb structure having a porous partition wall disposed to surround a plurality of cells; and a plugging portion provided at one end of the cell, wherein the honeycomb structure has an inflow side region including a range of up to at least 30% with respect to the total length of the honeycomb structure with the inflow end face as the starting point and an outflow side region including a range of up to at least 20% with respect to the total length of the honeycomb structure with the outflow end face as the starting point, in the extending direction of the cell of the honeycomb structure, an average pore diameter of the partition wall in the inflow side region is 15 to 20 ?m and an average pore diameter of the partition wall in the outflow side region is 9 to 14 ?m.
    Type: Application
    Filed: December 22, 2021
    Publication date: September 29, 2022
    Applicant: NGK Insulators, Ltd.
    Inventors: Fumihiko YOSHIOKA, Sachiko ISHIDA
  • Publication number: 20220305478
    Abstract: A honeycomb filter includes a honeycomb structure having a porous partition wall disposed to surround a plurality of cells; and a plugging portion provided at one end of the cell, wherein the honeycomb structure has an inflow side region including a range of up to at least 30% with respect to the total length of the honeycomb structure with the inflow end face as the starting point and an outflow side region including a range of up to at least 20% with respect to the total length of the honeycomb structure with the outflow end face as the starting point, in the extending direction of the cell of the honeycomb structure, an average pore diameter of the partition wall in the inflow side region is 9 to 14 ?m and an average pore diameter of the partition wall in the outflow side region is 15 to 20 ?m.
    Type: Application
    Filed: December 15, 2021
    Publication date: September 29, 2022
    Applicant: NGK Insulators, Ltd.
    Inventors: Sachiko ISHIDA, Fumihiko YOSHIOKA
  • Publication number: 20220266216
    Abstract: A lactic acid adsorbent includes at least one of a layered double hydroxide that contains multiple metal hydroxide layers and also contains anions and water molecules held between the metal hydroxide layers, or a layered double oxide that is an oxide of a layered double hydroxide. The metal hydroxide layers contain divalent metal ions M2+ and trivalent metal ions M3+, mole ratio (M2+/M3+) of the divalent metal ions M2+ to the trivalent metal ions M3+ in a layered double hydroxide is 1.9 to 3.6, and the mole ratio in a layered double oxide is 1.8 to 3.6.
    Type: Application
    Filed: May 11, 2022
    Publication date: August 25, 2022
    Inventors: Toshiaki YOSHIOKA, Tomohito KAMEDA, Fumihiko KITAGAWA, Yoichi JIMBO, Masayuki KONDO
  • Publication number: 20220266220
    Abstract: A lactic acid adsorbent includes a layered double hydroxide that contains multiple metal hydroxide layers and also contains anions and water molecules held between the metal hydroxide layers. The anions include (i) an amino acid such as glutamine, (ii) a dipeptide constituted by one or two kinds of amino acids such as glutamine, (iii) a vitamin such as ascorbic acid 2-phosphate, (iv) a pH buffer such as MES, (v) a glucose metabolite such as pyruvic acid, or (vi) inorganic ions selected from a group including NO3? and Cl?.
    Type: Application
    Filed: May 11, 2022
    Publication date: August 25, 2022
    Inventors: Toshiaki YOSHIOKA, Tomohito KAMEDA, Fumihiko KITAGAWA, Yoichi JIMBO, Masayuki KONDO
  • Patent number: 11400441
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face or the outflow end face of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region, and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, a plugging length L1 in the cell extending direction of a central plugging portion in the central region is larger than a plugging length L2 of a circumferential plugging portion in the circumferential region, L1 ranges from 7 to 9 mm, and L2 from 3 to 6 mm.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: August 2, 2022
    Assignee: NGK Insulators, Ltd.
    Inventor: Fumihiko Yoshioka
  • Patent number: 11293317
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 55 to 65%, an average pore diameter of the partition wall measured by a mercury press-in method is 5 to 10 ?m, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (?m) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 8 ?m or less, the pore diameter value corresponding to a ? value width of the maximum value.
    Type: Grant
    Filed: January 18, 2021
    Date of Patent: April 5, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Fumihiko Yoshioka, Nozomu Hirai, Kyohei Kato
  • Patent number: 11280237
    Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure includes a platinum group element-containing catalyst layer, the platinum group element-containing catalyst layer is disposed only on a side of an inner surface of the partition walls surrounding the outflow cells, and the platinum group element-containing catalyst layer is disposed in a range of at least up to 35% with respect to an overall length of the cells starting from the outflow end face and is not disposed in a range of at least up to 30% with respect to the overall length of the cells starting from the inflow end face, in an extending direction of the cells of the honeycomb structure.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: March 22, 2022
    Assignees: NGK Insulators, Ltd., Honda Motor Co., Ltd.
    Inventors: Fumihiko Yoshioka, Yoshiaki Hatakeyama, Noritaka Masumitsu
  • Patent number: 11280236
    Abstract: A honeycomb filter, including: a honeycomb structure, wherein the honeycomb structure includes a platinum group element-containing catalyst layer, the platinum group element-containing catalyst layer is disposed only on a side of an inner surface of the partition walls surrounding the inflow cells, and the platinum group element-containing catalyst layer is disposed in a range of at least up to 40% with respect to an overall length of the cells starting from the outflow end face and is not disposed in a range of at least up to 30% with respect to the overall length of the cells starting from the inflow end face, in an extending direction of the cells of the honeycomb structure.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: March 22, 2022
    Assignees: NGK Insulators, Ltd., Honda Motor Co., Ltd.
    Inventors: Fumihiko Yoshioka, Yoshiaki Hatakeyama, Noritaka Masumitsu
  • Patent number: 11274588
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 60 to 68%, an average pore diameter of the partition wall measured by a mercury press-in method is 19 to 26 ?m, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (?m) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 18 ?m or less, the pore diameter value corresponding to a ? value width of the maximum value.
    Type: Grant
    Filed: January 18, 2021
    Date of Patent: March 15, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Fumihiko Yoshioka, Yuji Sasaki, Kimiko Kishine, Sachiko Ishida, Kyohei Kato
  • Patent number: 11260384
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and a porous plugging portion provided either at an end on the inflow end face or the outflow end face of the cells, wherein the plugging portion is composed of a porous material, the honeycomb structure has a central region and a circumferential region, and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, porosity of a central plugging portion in the central region is lower than that of a circumferential plugging portion in the circumferential region, and the porosity of the central plugging portions ranges from 60% to 68%, and that of the circumferential plugging portions ranges from 70% to 85%.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: March 1, 2022
    Assignee: NGK Insulators, Ltd.
    Inventor: Fumihiko Yoshioka
  • Publication number: 20210268424
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 60 to 68%, an average pore diameter of the partition wall measured by a mercury press-in method is 13 to 18 ?m, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (?m) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 15 ?m or less, the pore diameter value corresponding to a ? value width of the maximum value.
    Type: Application
    Filed: January 18, 2021
    Publication date: September 2, 2021
    Applicant: NGK Insulators, Ltd.
    Inventors: Fumihiko YOSHIOKA, Yuji SASAKI, Kimiko KISHINE, Sachiko ISHIDA, Kyohei KATO
  • Publication number: 20210268423
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 60 to 68%, an average pore diameter of the partition wall measured by a mercury press-in method is 8 to 12 and in a pore diameter distribution which indicates a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (?m) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak that includes a maximum value of the log differential pore volume has a pore diameter value of 10 ?m or less, the pore diameter value corresponding to a ? value width of the maximum value.
    Type: Application
    Filed: January 18, 2021
    Publication date: September 2, 2021
    Applicant: NGK Insulators, Ltd.
    Inventors: Fumihiko YOSHIOKA, Yuji SASAKI, Kimiko KISHINE, Sachiko ISHIDA, Kyohei KATO
  • Publication number: 20210270172
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 60 to 68%, an average pore diameter of the partition wall measured by a mercury press-in method is 19 to 26 ?m, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (?m) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 18 ?m or less, the pore diameter value corresponding to a ? value width of the maximum value.
    Type: Application
    Filed: January 18, 2021
    Publication date: September 2, 2021
    Applicant: NGK Insulators, Ltd.
    Inventors: Fumihiko YOSHIOKA, Yuji SASAKI, Kimiko KISHINE, Sachiko ISHIDA, Kyohei KATO
  • Publication number: 20210270163
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 55 to 65%, an average pore diameter of the partition wall measured by a mercury press-in method is 5 to 10 ?m, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (?m) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 8 ?m or less, the pore diameter value corresponding to a ? value width of the maximum value.
    Type: Application
    Filed: January 18, 2021
    Publication date: September 2, 2021
    Applicant: NGK Insulators, Ltd.
    Inventors: Fumihiko YOSHIOKA, Nozomu HIRAI, Kyohei KATO
  • Patent number: 11103862
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face or the outflow end face of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, and a plugging length L1 in the cell extending direction of a central plugging portion in the central region is smaller than a plugging length L2 of a circumferential plugging portion in the circumferential region, L1 ranges from 3 to 6 mm, and L2 from 7 to 9 mm.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: August 31, 2021
    Assignee: NGK Insulators, Ltd.
    Inventor: Fumihiko Yoshioka
  • Patent number: 10994236
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls placed, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face; and porous plugging portions provided either at the ends on the inflow end face side of the cells or at the ends on the outflow end face side of the cells, wherein the plugging portions include plugging portions that have voids therein, and in the plugging portions having the voids, porosity including the voids as pores ranges from 68% to 83%.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: May 4, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Kimiko Kishine, Fumihiko Yoshioka
  • Patent number: 10974187
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face side or the outflow end face side of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region, and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, porosity of a central plugging portion in the central region, is higher than that of a circumferential plugging portion in the circumferential region, and the porosity of the central plugging portion ranges from 76% to 85%, and that of the circumferential plugging portion from 60% to 75%.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: April 13, 2021
    Assignee: NGK Insulators, Ltd.
    Inventor: Fumihiko Yoshioka
  • Patent number: 10821390
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall surrounding cells each of which has one end plugged by a plugging portion. An open frontal area O (%) of the cells in the honeycomb structure body is 75 to 80%, a porosity P (%) of the partition wall measured by a mercury press-in method is 52 to 58%, an average pore diameter D (?m) of the partition wall measured by the mercury press-in method is 6 to 12 ?m, and a pore volume rate A (%) of pores whose pore diameters are not less than 20 ?m with respect to an overall pore volume of the partition wall is not more than 13.5%.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: November 3, 2020
    Assignee: NGK Insulators, Ltd.
    Inventor: Fumihiko Yoshioka
  • Publication number: 20200306740
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face or the outflow end face of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region, and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, a plugging length L1 in the cell extending direction of a central plugging portion in the central region is larger than a plugging length L2 of a circumferential plugging portion in the circumferential region, L1 ranges from 7 to 9 mm, and L2 from 3 to 6 mm.
    Type: Application
    Filed: March 11, 2020
    Publication date: October 1, 2020
    Applicant: NGK Insulators, Ltd.
    Inventor: Fumihiko Yoshioka