Patents by Inventor Keiichi Narita
Keiichi Narita 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).
-
Patent number: 8187996Abstract: An object of the present invention is to provide an exhaust gas-purifying catalyst containing a composite oxide catalyst and a refractory support and being less prone to cause a decrease in its activity even when used at high temperatures in an atmosphere with high oxygen concentration. An exhaust gas-purifying catalyst includes a composite oxide catalyst containing rare-earth element, alkaline-earth element and precious metal, a part of the rare-earth element and a part of the alkaline-earth element forming composite oxide, and the composite oxide and a part of the precious metal forming solid solution, and a refractory support supporting the composite oxide catalyst and including at least one of a first composite oxide represented by a general formula AB2O4, a second composite oxide having perovskite structure represented by a general formula LMO3, and a third composite oxide having pyrochlore structure represented by a general formula X2Y2O7.Type: GrantFiled: April 21, 2011Date of Patent: May 29, 2012Assignee: Cataler CorporationInventors: Satoshi Matsueda, Mareo Kimura, Keiichi Narita
-
Publication number: 20120122672Abstract: An exhaust gas-purifying catalyst includes first particles of oxygen storage material, second particles of one or more rare-earth elements other than cerium and/or compounds thereof interposed between the first particles, and third particles of one or more precious metal elements interposed between the first particles, wherein a spectrum of a characteristic X-ray intensity for one of the rare-earth element(s) and a spectrum of a characteristic X-ray intensity for one of the precious metal element(s) that are obtained by performing a line analysis using energy-dispersive X-ray spectrometry along a length of 500 nm have a correlation coefficient of 0.68 or more.Type: ApplicationFiled: January 23, 2012Publication date: May 17, 2012Inventors: Satoshi Matsueda, Akimasa Hirai, Kenichi Taki, Keiichi Narita, Asuka Hori, Masahiro Kusaka
-
Publication number: 20120122667Abstract: An exhaust gas-purifying catalyst includes first particles of oxygen storage material, second particles of one or more acidic oxides interposed between the first particles, and third particles of one or more precious metal elements interposed between the first particles, wherein a spectrum of a characteristic X-ray intensity for one of constituent elements of the acidic oxide(s) other than oxygen and a spectrum of a characteristic X-ray intensity for one of the precious metal element(s) that are obtained by performing a line analysis using energy-dispersive X-ray spectrometry along a length of 500 nm have a correlation coefficient of 0.70 or more.Type: ApplicationFiled: January 23, 2012Publication date: May 17, 2012Inventors: Satoshi Matsueda, Akimasa Hirai, Kenichi Taki, Keiichi Narita, Asuka Hori, Masahiro Kusaka
-
Patent number: 8158552Abstract: An exhaust gas purifying catalyst exhibiting high purification performance in the Hot range is provided. The exhaust gas purifying catalyst has a catalyst substrate and a catalyst coating layer formed on the catalyst substrate. The catalyst coating layer has a layered structure including an inside layer a containing the component (a-1) and the component (a-2) described below, and an outside layer b containing the component (b-1) and the component (b-2) described below. Component (a-1) and component (b-1): noble metals. Component (a-2): a compound oxide of (i) Ce, (ii) Zr and (iii) an element selected from the group consisting of rare earth elements, alkaline earth elements and Y, having a ratio of (ii) to (i) within the range of more than 40/100 but not more than 100/2 in terms of the weight ratio between CeO2 and ZrO2.Type: GrantFiled: July 4, 2007Date of Patent: April 17, 2012Assignee: Cataler CorporationInventors: Asuka Hori, Akimasa Hirai, Keiichi Narita
-
Patent number: 8133839Abstract: An exhaust gas-purifying catalyst (1) contains a rare-earth element, an alkaline-earth element, zirconium and a precious metal, wherein an atomic ratio of the alkaline-earth element with respect to a sum of the rare-earth element and the zirconium is 10 atomic % or more, a part of the rare-earth element and a part of zirconium form a composite oxide with at least a part of the alkaline-earth element, and the composite oxide and a part of the precious metal form a solid solution.Type: GrantFiled: June 2, 2006Date of Patent: March 13, 2012Assignees: Cataler Corporation, Daihatsu Motor Co., Ltd.Inventors: Satoshi Matsueda, Mareo Kimura, Akimasa Hirai, Keiichi Narita, Hirohisa Tanaka, Mari Uenishi, Isao Tan, Masashi Taniguchi
-
Publication number: 20110294708Abstract: A lubricating oil composition for automatic transmission including (A) a lubricant base oil having a kinematic viscosity at 100° C. of from 1.5 to 20 mm2/s, (B) a polymethacrylate based viscosity index improver, and (C) a sulfur based compound having an acid value of not more than 1.0 mg-KOH/g and represented by the following general formula (1): S—(CH2CH2COOR)2??(1) (in the formula, R represents a hydrocarbon group having from 8 to 30 carbon atoms), which has a high transmission torque capacity and satisfactory gear change shock characteristics and attains excellent fuel efficiency, is provided. Also, a lubricating oil composition for automatic transmission which is a lubricating oil having a low viscosity and a high viscosity index and which, despite this, not only has excellent shear stability and fatigue resistance (durability) but has a high transmission torque capacity and satisfactory gear change shock characteristics and attains excellent fuel efficiency, is provided.Type: ApplicationFiled: January 28, 2010Publication date: December 1, 2011Applicant: IDEMITSU KOSAN CO., LTD.Inventor: Keiichi Narita
-
Publication number: 20110245076Abstract: An exhaust gas purification catalyst includes a substrate, and a first catalyst layer formed on the substrate, the first catalyst layer containing palladium and/or platinum and alumina doped with an alkaline-earth metal element. The exhaust gas purification catalyst has a correlation coefficient ?Al,AE given by the following formula of 0.Type: ApplicationFiled: June 17, 2011Publication date: October 6, 2011Inventors: Satoshi Matsueda, Akimasa Hirai, Kenichi Taki, Keiichi Narita, Yuji Yabuzaki, Daisuke Ochiai
-
Publication number: 20110207601Abstract: An object of the present invention is to provide an exhaust gas-purifying catalyst containing a composite oxide catalyst and a refractory support and being less prone to cause a decrease in its activity even when used at high temperatures in an atmosphere with high oxygen concentration. An exhaust gas-purifying catalyst includes a composite oxide catalyst containing rare-earth element, alkaline-earth element and precious metal, a part of the rare-earth element and a part of the alkaline-earth element forming composite oxide, and the composite oxide and a part of the precious metal forming solid solution, and a refractory support supporting the composite oxide catalyst and including at least one of a first composite oxide represented by a general formula AB2O4, a second composite oxide having perovskite structure represented by a general formula LMO3, and a third composite oxide having pyrochlore structure represented by a general formula X2Y2O7.Type: ApplicationFiled: April 21, 2011Publication date: August 25, 2011Applicant: CATALER CORPORATIONInventors: Satoshi MATSUEDA, Mareo Kimura, Keiichi Narita
-
Patent number: 7976887Abstract: Volatile components are obtained by steam extraction of tasty materials. Coffee beans following roasting or tea leaves following tea manufacturing are used as tasty materials. Steam extraction includes of processing in which steam is contacted with a tasty material followed by recovery of the steam after that contact. Saturated water vapor or super heated steam is used for the steam, while super heated steam is used preferably. The coffee beans are preferably those that have been obtained by roasting raw coffee beans using super heated steam. The food or drink contains the aromatic components, and preferably contains the volatile components as well as an aqueous extract of the tasty material.Type: GrantFiled: November 2, 2004Date of Patent: July 12, 2011Assignee: Pokka CorporationInventors: Takashi Inoue, Yumiko Aoyama, Michiya Hayashi, Keiichi Narita
-
Patent number: 7956005Abstract: An object of the present invention is to provide an exhaust gas-purifying catalyst containing a composite oxide catalyst and a refractory support and being less prone to cause a decrease in its activity even when used at high temperatures in an atmosphere with high oxygen concentration. An exhaust gas-purifying catalyst includes a composite oxide catalyst containing rare-earth element, alkaline-earth element and precious metal, a part of the rare-earth element and a part of the alkaline-earth element forming composite oxide, and the composite oxide and a part of the precious metal forming solid solution, and a refractory support supporting the composite oxide catalyst and including at least one of a first composite oxide represented by a general formula AB2O4, a second composite oxide having perovskite structure represented by a general formula LMO3, and a third composite oxide having pyrochlore structure represented by a general formula X2Y2O7.Type: GrantFiled: March 28, 2008Date of Patent: June 7, 2011Assignee: Cataler CorporationInventors: Satoshi Matsueda, Mareo Kimura, Keiichi Narita
-
Publication number: 20110053816Abstract: Provided is a lubricating oil composition containing a base oil which includes a mineral oil and/or a synthetic oil, and compounded therein, (A) at least one phosphorus-containing compound selected from phosphoric acid monoesters, phosphoric acid diesters and phosphorous acid monoesters, each having a C1 to C8 hydrocarbon group or groups and (B) a tertiary amine compound having C6 to C10 hydrocarbon groups as substituents thereof. The lubricating oil composition provides both a high metal to metal friction coefficient and an excellent wear resistance and is suitably used in a continuously variable transmission.Type: ApplicationFiled: January 9, 2009Publication date: March 3, 2011Applicant: IDEMITSU KOSAN Co., Ltd.Inventor: Keiichi Narita
-
Patent number: 7795170Abstract: Provided is a catalyst with a noble metal efficiently supported on the surfacemost thereof. A composite oxide-containing layer is formed on a catalyst carrier so as to contain a perovskite-type composite oxide represented by the following general formula (1) and an other composite oxide, and a noble metal layer is further formed on the catalyst carrier so as to be supported on the surfacemost of the catalyst carrier by immersing the catalyst carrier formed with the composite oxide-containing layer in an aqueous noble metal salt solution to impregnate the catalyst carrier with the aqueous noble metal salt solution: AxByO3±???(1) (wherein A represents at least one element selected from rare earth elements and alkaline earth metals; B represents at least one element selected from transition elements (excluding rare earth elements); x represents an atomic ratio of less than 1; y represents an atomic ratio of 1.0; and ? represents an oxygen excess or an oxygen deficiency.Type: GrantFiled: April 23, 2007Date of Patent: September 14, 2010Assignees: Daihatsu Motor Co., Cataler CorporationInventors: Hirohisa Tanaka, Isao Tan, Mari Uenishi, Masashi Taniguchi, Mareo Kimura, Satoshi Matsueda, Akimasa Hirai, Keiichi Narita
-
Publication number: 20100204039Abstract: The exhaust gas-purifying catalyst includes at least one of a first composite oxide represented by a formula A(Al2-xBx)O4 and a second composite oxide represented by a formula (Al2-yCy)O3, wherein element A is a divalent transition metal other than platinum-group elements, each of elements B and C is a transition metal other than platinum-group elements, x satisfies 0<x<2, and y satisfies 0<y<2.Type: ApplicationFiled: April 22, 2010Publication date: August 12, 2010Applicants: CATALER CORPORATION, DIAHATSU MOTOR CO., LTD.Inventors: Satoshi MATSUEDA, Mareo Kimura, Hiroto Yoshida, Keiichi Narita, Hirohisa Tanaka, Mari Uenishi, Masashi Taniguchi
-
Publication number: 20100004123Abstract: An excellent oxygen storage capacity is achieved even in the case used for a long period of time under high temperature conditions. An oxygen storage material contains a first particle made of a composite oxide of cerium and zirconium or a composite oxide of cerium, a rare-earth element other than cerium and zirconium, a second particle including a composite oxide of a rare-earth element, an alkaline-earth element and zirconium, and a precious metal. A part of the precious metal forms a solid solution with the composite oxide included in the second particle.Type: ApplicationFiled: June 22, 2007Publication date: January 7, 2010Applicants: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DAIHATSU MOTOR CO., LTD.Inventors: Mareo Kimura, Keiichi Narita, Akimasa Hirai, Akiya Chiba, Naoto Miyoshi, Kazunobu Ishibashi, Takaaki Kanazawa, Takeru Yoshida, Hirohisa Tanaka, Mari Uenishi, Isao Tan, Masashi Taniguchi
-
Publication number: 20100004122Abstract: A high NOx-purifying performance at high temperature conditions is achieved with a small amount of precious metal used. An exhaust gas-purifying catalyst includes a substrate, a lower layer formed on the substrate and including a first composite oxide, palladium and platinum, and an upper layer formed on the lower layer and including a second composite oxide and rhodium. The first composite oxide includes cerium, zirconium, and an element selected from the group consisting of rare-earth elements other than cerium and alkaline-earth elements. A mass ratio of platinum with respect to palladium falls within a range of 1/50 to 1/20. The second composite oxide includes zirconium and an element selected from the group consisting of rare-earth elements other than cerium and alkaline-earth elements and has an atomic ratio of cerium with respect to zirconium smaller than that of the first composite oxide.Type: ApplicationFiled: September 16, 2009Publication date: January 7, 2010Applicant: CATALER CORPORATIONInventors: Asuka HORI, Akimasa Hirai, Keiichi Narita
-
Patent number: 7622418Abstract: To provide a method for industrially efficiently producing an exhaust gas purifying catalyst containing a perovskite-type composite oxide which is stable and has a less reduced specific surface area and is also effectively prevented from decreasing in its catalytic performance even in endurance in high temperature oxidative reducing atmospheres, a pre-crystallization composition containing elementary components constituting a perovskite-type composite oxide containing a noble metal is prepared, is mixed with a powder of theta-alumina and/or alpha-alumina to prepare a mixture, and the mixture is heat treated. Thus, the resulting perovskite-type composite oxide supported by the powder of theta-alumina and/or alpha-alumina can keep its thermostability at a sufficient level thereby to effectively prevent the catalytic performance from decreasing. This method can industrially efficiently produce the exhaust gas purifying catalyst.Type: GrantFiled: July 3, 2003Date of Patent: November 24, 2009Assignees: Daihatsu Motor Company, Ltd., Hokko Chemical Industry Co., Ltd.Inventors: Hirohisa Tanaka, Isao Tan, Mari Uenishi, Nobuhiko Kajita, Masashi Taniguchi, Yasunori Sato, Keiichi Narita, Noboru Sato
-
Publication number: 20090280979Abstract: An exhaust gas purifying catalyst exhibiting high purification performance in the Hot range is provided. The exhaust gas purifying catalyst has a catalyst substrate and a catalyst coating layer formed on the catalyst substrate. The catalyst coating layer has a layered structure including an inside layer a containing the component (a-1) and the component (a-2) described below, and an outside layer b containing the component (b-1) and the component (b-2) described below. Component (a-1) and component (b-1): noble metals. Component (a-2): a compound oxide of (i) Ce, (ii) Zr and (iii) an element selected from the group consisting of rare earth elements, alkaline earth elements and Y, having a ratio of (ii) to (i) within the range of more than 40/100 but not more than 100/2 in terms of the weight ratio between CeO2 and ZrO2.Type: ApplicationFiled: July 4, 2007Publication date: November 12, 2009Applicant: CATALER CORPORATIONInventors: Asuka Hori, Akimasa Hirai, Keiichi Narita
-
Patent number: 7601325Abstract: To provide a perovskite-type composite oxide which has stable quality in which a solid solution of Pd is formed at a high rate, a method for producing the perovskite-type composite oxide, and a catalyst composition containing the perovskite-type composite oxide, the perovskite-type composite oxide is produced by formulating materials in accordance with each atomic ratio of a perovskite-type composite oxide represented by the following general formula (1): AxB(1-y)PdyO3+???(1) wherein A represents at least one element selected from rare earth elements and alkaline earth metals; B represents at least one element selected from transition elements (excluding rare earth elements, and Pd), Al and Si; x represents an atomic ratio satisfying the following condition: 1<x; y represents an atomic ratio satisfying the following condition: 0<y?0.5; and ? represents an oxygen excess.Type: GrantFiled: March 18, 2005Date of Patent: October 13, 2009Assignees: Daihatsu Motor Co., Ltd., Hokko Chemical Industry Co., Ltd., Cataler CorporationInventors: Hirohisa Tanaka, Isao Tan, Mari Uenishi, Nobuhiko Kajita, Masashi Taniguchi, Kimiyoshi Kaneko, Senshu Mitachi, Mareo Kimura, Keiichi Narita, Noboru Sato
-
Publication number: 20090253574Abstract: Provided is a catalyst with a noble metal efficiently supported on the surfacemost thereof. A composite oxide-containing layer is formed on a catalyst carrier so as to contain a perovskite-type composite oxide represented by the following general formula (1) and an other composite oxide, and a noble metal layer is further formed on the catalyst carrier so as to be supported on the surfacemost of the catalyst carrier by immersing the catalyst carrier formed with the composite oxide-containing layer in an aqueous noble metal salt solution to impregnate the catalyst carrier with the aqueous noble metal salt solution: AxByO3±???(1) (wherein A represents at least one element selected from rare earth elements and alkaline earth metals; B represents at least one element selected from transition elements (excluding rare earth elements); x represents an atomic ratio of less than 1; y represents an atomic ratio of 1.0; and ? represents an oxygen excess or an oxygen deficiency.Type: ApplicationFiled: April 23, 2007Publication date: October 8, 2009Applicants: DAIHATSU MOTOR CO., LTD., CATALER CORPORATIONInventors: Hirohisa Tanaka, Isao Tan, Mari Uenishi, Masashi Taniguchi, Mareo Kimura, Satoshi Matsueda, Akimasa Hirai, Keiichi Narita
-
Publication number: 20090131252Abstract: To provide a catalyst composition containing a novel perovskite-type composite oxide which permits reversible entrance and exit of noble metals, a catalyst composition is prepared so as to contain a perovskite-type composite oxide represented by the general formula (1): AxA?wByB?(1-y-z)NzO3±???(1) (wherein A represents at least one element selected from alkaline earth metals; A? represents at least one element selected from rare earth elements; B represents a tetravalent rare earth element; B? represents at least one element selected from transition elements (excluding tetravalent rare earth elements, Rh, Pd and Pt); N represents at least one element selected from Rh, Pd and Pt; x and w represent an atomic ratio satisfying the following relations: 0.8?x+w?1.3 (0.8?x?1.3, 0?w?0.4); y represents an atomic ratio satisfying the following relation: 0<y<1.0; z represents an atomic ratio satisfying the following relation: 0<z?0.5; and ? represents an oxygen excess or deficiency amount).Type: ApplicationFiled: June 2, 2006Publication date: May 21, 2009Inventors: Hirohisa Tanaka, Isao Tan, Mari Uenishi, Masashi Taniguchi, Kazuya Naito, Mareo Kimura, Keiichi Narita, Hiromasa Suzuki, Satoshi Matsueda, Yoshinori Ishii