Patents by Inventor Takumi TOJO
Takumi TOJO 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: 10989092Abstract: The present invention provides a honeycomb structured body containing a ceria-zirconia composite oxide and being less susceptible to ring-off cracking. The honeycomb structured body of the present invention includes a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body contains ceria-zirconia composite oxide particles and inorganic fibers, and a b-axis thermal expansion coefficient measured in a direction along a b-axis representing a direction perpendicular to a longitudinal direction of the honeycomb structured body is higher than an a-axis thermal expansion coefficient measured in a direction along an a-axis representing the longitudinal direction of the honeycomb structured body.Type: GrantFiled: January 16, 2020Date of Patent: April 27, 2021Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya Yamamoto, Takeru Yoshida, Hiromasa Suzuki, Masaru Kakinohana, Takumi Tojo
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Patent number: 10953395Abstract: The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles, ?-alumina particles, ?-alumina, and ?-alumina fibers, and the honeycomb fired body has a porosity of 55 to 70%.Type: GrantFiled: January 11, 2019Date of Patent: March 23, 2021Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke Goto, Kenta Nomura, Takumi Tojo, Takeru Yoshida, Hiromasa Suzuki
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Publication number: 20200340383Abstract: The present disclosure provides the exhaust gas purification catalyst capable of efficiently converting HC in the upstream region relative to the exhaust gas flow direction in the exhaust gas purification catalyst and capable of efficiently converting NOx in the downstream region relative to the exhaust gas flow direction in the exhaust gas purification catalyst while maintaining the good warming-up performance.Type: ApplicationFiled: April 9, 2020Publication date: October 29, 2020Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Takumi TOJO, Takeru YOSHIDA, Hiromasa SUZUKI, Minoru ITO, Kana IWATA
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Publication number: 20200232367Abstract: The present invention provides a honeycomb structured body containing a ceria-zirconia composite oxide and not easily breakable under stress in an a-axis direction. The honeycomb structured body includes a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body contains ceria-zirconia composite oxide particles and inorganic fibers, and 60 to 80% of inorganic fibers observed in a cross-sectional image of the honeycomb structured body cut in a cross-sectional direction perpendicular to a longitudinal direction have a ratio of the length of a long axis to the length of a short axis (long axis/short axis) of 1.00 to 1.30, the length of the long axis being the length of a long axis of a cross section of an inorganic fiber shown in the cross-sectional image, the length of the short axis being the length of a perpendicular bisector of the long axis.Type: ApplicationFiled: January 16, 2020Publication date: July 23, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya YAMAMOTO, Takeru YOSHIDA, Hiromasa SUZUKI, Masaru KAKINOHANA, Takumi TOJO
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Publication number: 20200232368Abstract: The present invention provides a honeycomb structured body containing a ceria-zirconia composite oxide and being less susceptible to ring-off cracking. The honeycomb structured body of the present invention includes a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body contains ceria-zirconia composite oxide particles and inorganic fibers, and a b-axis thermal expansion coefficient measured in a direction along a b-axis representing a direction perpendicular to a longitudinal direction of the honeycomb structured body is higher than an a-axis thermal expansion coefficient measured in a direction along an a-axis representing the longitudinal direction of the honeycomb structured body.Type: ApplicationFiled: January 16, 2020Publication date: July 23, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya YAMAMOTO, Takeru YOSHIDA, Hiromasa SUZUKI, Masaru KAKINOHANA, Takumi TOJO
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Publication number: 20200222882Abstract: The present invention provides a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia composite oxide and alumina, and cerium on a surface of each partition wall has a lower concentration than cerium in a central portion of the partition wall in a thickness direction.Type: ApplicationFiled: March 26, 2020Publication date: July 16, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Takumi TOJO, Takeru YOSHIDA, Hiromasa SUZUKI
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Publication number: 20200222881Abstract: The present invention relates to a honeycomb catalytic converter, including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and Pd and Rh supported on the partition walls of the honeycomb structured body, wherein the honeycomb structured body is an extrudate containing a ceria-zirconia complex oxide and alumina, a Pd-carrying region where only Pd is supported is formed on the partition walls within a predetermined width from one end of the honeycomb structured body, and a Rh-carrying region where only Rh is supported is formed on the partition walls within a predetermined width from the other end of the honeycomb structured body, and the Pd-carrying region extends to at least 50% of the length of the honeycomb structured body, and the Rh-carrying region extends to at least 20% of the length of the honeycomb structured body.Type: ApplicationFiled: March 26, 2020Publication date: July 16, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Takumi TOJO, Takeru YOSHIDA, Hiromasa SUZUKI
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Publication number: 20200222889Abstract: The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body including in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia complex oxide and alumina, each partition wall includes a first carrier layer defining a surface layer of the partition wall and carrying Rh, and a second carrier layer located more inwardly of the partition wall than the first carrier layer and carrying Pd, and the Pd concentration on the first carrier layer side of each second carrier layer is higher than the Pd concentration in the center of the second carrier layer.Type: ApplicationFiled: March 26, 2020Publication date: July 16, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Takeru YOSHIDA, Takumi TOJO, Hiromasa SUZUKI
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Publication number: 20200222883Abstract: The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia complex oxide and alumina, each partition wall includes a first carrier layer defining a surface layer of the partition wall and carrying Pd, and a second carrier layer located more inwardly of the partition wall than the first carrier layer and carrying Rh.Type: ApplicationFiled: March 26, 2020Publication date: July 16, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Takeru YOSHIDA, Takumi TOJO, Hiromasa SUZUKI
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Publication number: 20200222884Abstract: The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a noble metal supported on the honeycomb structured body; and an inlet-side end face and on outlet-side end face, wherein each partition wall includes a substrate portion in the form of an extrudate containing a ceria-zirconia complex oxide and alumina, and a coat layer formed on a surface of the substrate portion and containing the noble metal, and the inlet-side end face has a higher aperture ratio than the outlet-side end face.Type: ApplicationFiled: March 26, 2020Publication date: July 16, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Takumi TOJO, Takeru YOSHIDA, Hiromasa SUZUKI
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Publication number: 20200222890Abstract: The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein each partition wall includes a substrate portion in the form of an extrudate containing a ceria-zirconia complex oxide and alumina, and a coat layer formed on a surface of the substrate portion and containing the noble metal, and the partition walls have a thermal expansion coefficient of 7.0×10?6/° C. to 8.0×10?6/° C. in a longitudinal direction.Type: ApplicationFiled: March 26, 2020Publication date: July 16, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Takumi TOJO, Takeru YOSHIDA, Hiromasa SUZUKI
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Patent number: 10603658Abstract: The present invention provides a honeycomb structured body capable of achieving more effective use of a catalyst in partition walls and having excellent exhaust gas conversion performance. The present invention relates to a honeycomb structured body including: a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body contains ceria-zirconia composite oxide particles and alumina particles, the partition wall of the honeycomb fired body contains macropores having a pore size of 2 to 50 ?m, and in an electron microscope image of a cross section of the partition wall, the percentage of the area occupied by pores having a pore size of 5 to 15 ?m is at least 85% of the total area of the macropores.Type: GrantFiled: September 11, 2019Date of Patent: March 31, 2020Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Misako Makino, Daisuke Mori, Takeru Yoshida, Hiromasa Suzuki, Masaru Kakinohana, Takumi Tojo
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Publication number: 20200078779Abstract: The present invention provides a honeycomb structured body capable of achieving more effective use of a catalyst in partition walls and having excellent exhaust gas conversion performance. The present invention relates to a honeycomb structured body including: a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body contains ceria-zirconia composite oxide particles and alumina particles, the partition wall of the honeycomb fired body contains macropores having a pore size of 2 to 50 ?m, and in an electron microscope image of a cross section of the partition wall, the percentage of the area occupied by pores having a pore size of 5 to 15 ?m is at least 85% of the total area of the macropores.Type: ApplicationFiled: September 11, 2019Publication date: March 12, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Misako MAKINO, Daisuke MORI, Takeru YOSHIDA, Hiromasa SUZUKI, Masaru KAKINOHANA, Takumi TOJO
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Publication number: 20200078983Abstract: The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength.Type: ApplicationFiled: September 11, 2019Publication date: March 12, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Takeru YOSHIDA, Hiromasa SUZUKI, Masaru KAKINOHANA, Takumi TOJO
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Publication number: 20200078984Abstract: The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength.Type: ApplicationFiled: September 11, 2019Publication date: March 12, 2020Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Masaru KAKINOHANA, Takeru YOSHIDA, Hiromasa SUZUKI, Takumi TOJO
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Patent number: 10472290Abstract: The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles and alumina particles, and when the pore size of the partition wall of the honeycomb fired body is measured by mercury porosimetry, and the measurement results are shown as a pore size distribution curve with pore size (?m) on the horizontal axis and log differential pore volume (ml) on the vertical axis, at least one peak is present in each of the pore size ranges of 0.01 to 0.1 ?m and 0.1 to 5 ?m.Type: GrantFiled: January 11, 2019Date of Patent: November 12, 2019Assignees: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke Goto, Kenta Nomura, Takumi Tojo, Takeru Yoshida, Hiromasa Suzuki
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Publication number: 20190143313Abstract: The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles, ?-alumina particles, ?-alumina, and ?-alumina fibers, and the honeycomb fired body has a porosity of 55 to 70%.Type: ApplicationFiled: January 11, 2019Publication date: May 16, 2019Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Kenta NOMURA, Takumi TOJO, Takeru YOSHIDA, Hiromasa SUZUKI
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Publication number: 20190143312Abstract: The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles and alumina particles, the ceria-zirconia composite oxide particles have an average particle size of 1 to 50 ?m, and the ceria-zirconia composite oxide particles include a cracked particle.Type: ApplicationFiled: January 11, 2019Publication date: May 16, 2019Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Takumi TOJO, Takeru YOSHIDA, Hiromasa SUZUKI
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Publication number: 20190144342Abstract: The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles and alumina particles, and when the pore size of the partition wall of the honeycomb fired body is measured by mercury porosimetry, and the measurement results are shown as a pore size distribution curve with pore size (?m) on the horizontal axis and log differential pore volume (ml) on the vertical axis, at least one peak is present in each of the pore size ranges of 0.01 to 0.1 ?m and 0.1 to 5 ?m.Type: ApplicationFiled: January 11, 2019Publication date: May 16, 2019Applicants: IBIDEN CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinnosuke GOTO, Kenta NOMURA, Takumi TOJO, Takeru YOSHIDA, Hiromasa SUZUKI