Patents by Inventor Keizo Harada
Keizo Harada 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: 6840978Abstract: A porous metal body having a foam structure of 500 ?m or less in average pore diameter, wherein the skeleton is composed of an alloy primarily including Fe and Cr, and Cr carbide or FeCr carbide is uniformly dispersed in the texture. The metal porous body is produced by preparing a slurry primarily containing an Fe oxide powder having an average particle diameter of 5 ?m or less, at least one powder selected from metallic Cr, Cr alloys, and Cr oxides, a thermosetting resin, and a diluent, applying a coating of this slurry to a resin core body having a foam structure, performing drying, and thereafter, performing firing in a non-oxidizing atmosphere so as to produce a metal porous body having the aforementioned skeleton structure.Type: GrantFiled: April 25, 2002Date of Patent: January 11, 2005Assignee: Sumitomo Electric Industries, Ltd.Inventors: Takahiro Matsuura, Keizo Harada
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Publication number: 20030200837Abstract: A porous metal body having a foam structure of 500 &mgr;m or less in average pore diameter, wherein the skeleton is composed of an alloy primarily including Fe and Cr, and Cr carbide or FeCr carbide is uniformly dispersed in the texture. The metal porous body is produced by preparing a slurry primarily containing an Fe oxide powder having an average particle diameter of 5 &mgr;m or less, at least one powder selected from metallic Cr, Cr alloys, and Cr oxides, a thermosetting resin, and a diluent, applying a coating of this slurry to a resin core body having a foam structure, performing drying, and thereafter, performing firing in a non-oxidizing atmosphere so as to produce a metal porous body having the aforementioned skeleton structure.Type: ApplicationFiled: January 28, 2003Publication date: October 30, 2003Inventors: Takahiro Matsuura, Keizo Harada
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Patent number: 6402488Abstract: An oil pump that can be reduced in weight and is excellent in wear resistance and easy to manufacture is provided. The oil pump includes an oil pump housing formed of aluminum alloy, and an inner rotor and an outer rotor that slide along the oil pump housing with contact kept therebetween to suck and discharge oil. Composite layers including porous metallic bodies are arranged at parts of the oil pump housing that contact the inner rotor and the outer rotor. Pores of the porous metallic bodies are impregnated with the aluminum alloy constituting the oil pump housing.Type: GrantFiled: January 26, 2001Date of Patent: June 11, 2002Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kenichi Watanabe, Keizo Harada, Koichi Sogabe, Toshiyuki Kosuge
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Patent number: 6387149Abstract: A metal porous body having a skeleton which has a foam structure, composed of an alloy composed mainly of Fe and Cr and includes a Cr carbide and/or FeCr carbide uniformly dispersed therein. The metal porous bodies are obtained by preparing a slurry mainly composed of an Fe oxide powder of average particle not more than 5 &mgr;m, at least one powder selected from among metallic Cr, Cr alloy and Cr oxide powders, thermosetting resin and a diluent; applying this slurry onto a foamed resin core body; then drying, and then forming a metal porous body by firing in a non-oxidizing atmosphere, including a heat-treatment at 950 to 1350° C. The metal porous bodies thus obtained have excellent heat resistance, corrosion resistance and strength and are useful as electrode base plates, catalyst supports and filter materials, and furthermore, as metallic composite materials.Type: GrantFiled: June 26, 2000Date of Patent: May 14, 2002Assignee: Sumitomo Electric Industries, Ltd.Inventors: Keizo Harada, Kenichi Watanabe
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Publication number: 20010016173Abstract: An oil pump that can be reduced in weight and is excellent in wear resistance and easy to manufacture is provided. The oil pump includes an oil pump housing formed of aluminum alloy, and an inner rotor and an outer rotor that slide along the oil pump housing with contact kept therebetween to suck and discharge oil. Composite layers including porous metallic bodies are arranged at parts of the oil pump housing that contact the inner rotor and the outer rotor. Pores of the porous metallic bodies are impregnated with the aluminum alloy constituting the oil pump housing.Type: ApplicationFiled: January 26, 2001Publication date: August 23, 2001Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kenichi Watanabe, Keizo Harada, Koichi Sogabe, Toshiyuki Kosuge
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Patent number: 6103319Abstract: A battery electrode substrate which is constituted of a porous metallic body structure having communicating pores at a porosity of at least 90% and an Fe/Ni multilayer structure wherein the skeletal portion of the porous metallic body is composed mainly of Fe and has an Ni covering layer on the surface thereof while pores communicating with the inside and outside of Fe skeletal portion exist in the Fe skeletal portion and the inside of the pores is covered with Ni. The electrode substrate is produced by applying an iron oxide powder of at most 20 .mu.m in an average particle size on a porous resin core body; heat treating the core to remove an organic resin component while simultaneously sintering Fe to obtain a porous Fe body; and then covering the Fe skeletal portion with Ni by electroplating. In this process, the iron oxide can be used in combination with carbon powder. Further, a nickel porous sintered body can also be produced using nickel oxide in place of iron oxide.Type: GrantFiled: August 18, 1998Date of Patent: August 15, 2000Assignees: Sumitomo Electric Industries, Ltd., Matsushita Electric Industrial Co., Ltd.Inventors: Keizo Harada, Kenichi Watanabe, Shosaku Yamanaka, Kiyoshi Hayashi, Nobuyasu Morishita, Hiroki Takeshima, Hideo Kaiya, Munehisa Ikoma
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Patent number: 6071650Abstract: A battery electrode substrate which is constituted of a porous metallic body structure having communicating pores at a porosity of at least 90% and an Fe/Ni multilayer structure wherein the skeletal portion of the porous metallic body is composed mainly of Fe and has an Ni covering layer on the surface thereof while pores communicating with the inside and outside of Fe skeletal portion exist in the Fe skeletal portion and the inside of the pores is covered with Ni. The electrode substrate is produced by applying an iron oxide powder of at most 20 .mu.m in an average particle size on a porous resin core body; heat treating the core to remove an organic resin component while simultaneously sintering Fe to obtain a porous Fe body; and then covering the Fe skeletal portion with Ni by electroplating. In this process, the iron oxide can be used in combination with carbon powder. Further, a nickel porous sintered body can also be produced using nickel oxide in place of iron oxide.Type: GrantFiled: August 18, 1998Date of Patent: June 6, 2000Assignees: Sumitomo Electric Industries, Ltd., Matsushita Electric Industrial Co., Ltd.Inventors: Keizo Harada, Kenichi Watanabe, Shosaku Yamanaka
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Patent number: 6020089Abstract: An electrode plate for a battery is constructed from a porous metal body having at least one low-porosity part selectively arranged therein. A porous resin core is coated with a paste having a metal component, passed through rolls provided with at least one recess to thereby form at least one low-porosity part and sintered. The resultant electrode plate for battery is not only ensured with respect to strength and capable of improving battery performance but also advantageous in that it is available at lowered cost and free from apprehension of supply of raw materials.Type: GrantFiled: October 12, 1995Date of Patent: February 1, 2000Assignee: Sumitomo Electric Industries, Ltd.Inventors: Keizo Harada, Masayuki Ishii, Kenichi Watanabe, Shosaku Yamanaka
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Patent number: 5968685Abstract: A battery electrode substrate which is constituted of a porous metallic body structure having communicating pores at a porosity of at least 90% and an Fe/Ni multilayer structure wherein the skeletal portion of the porous metallic body is composed mainly of Fe and has an Ni covering layer on the surface thereof while pores communicating with the inside and outside of Fe skeletal portion exist in the Fe skeletal portion and the inside of the pores is covered with Ni. The electrode substrate is produced by applying an iron oxide powder of at most 20 .mu.m in an average particle size on a porous resin core body; heat treating the core to remove an organic resin component while simultaneously sintering Fe to obtain a porous Fe body; and then covering the Fe skeletal portion with Ni by electroplating. In this process, the iron oxide can be used in combination with carbon powder. Further, a nickel porous sintered body can also be produced using nickel oxide in place of iron oxide.Type: GrantFiled: August 18, 1998Date of Patent: October 19, 1999Assignees: Sumitomo Electric Industries, Ltd., Matsushita Electric Industrial Co., Ltd.Inventors: Keizo Harada, Kenichi Watanabe, Shosaku Yamanaka, Kiyoshi Hayashi, Nobuyasu Morishita, Hiroki Takeshima, Hideo Kaiya, Munehisa Ikoma
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Patent number: 5965298Abstract: An electrode plate for a battery is constructed from a porous metal body having at least one low-porosity part selectively arranged therein. A porous resin core is coated with a paste having a metal component, passed through rolls provided with at least one recess to thereby form at least one low-porosity part and sintered. The resultant electrode plate for battery is not only ensured with respect to strength and capable of improving battery performance but also advantageous in that it is available at lowered cost and free from apprehension of supply of raw materials.Type: GrantFiled: December 12, 1997Date of Patent: October 12, 1999Assignee: Sumitomo Electric Industries, Ltd.Inventors: Keizo Harada, Masayuki Ishii, Kenichi Watanabe, Shosaku Yamanaka
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Patent number: 5910662Abstract: A semiconductor substrate comprising a single crystal substrate base such a silicon and a superconducting thin film layer deposited on said substrate base and composed of compound oxide such as Ln.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-.delta.. (Ln is lanthanide).Type: GrantFiled: December 14, 1993Date of Patent: June 8, 1999Assignee: Sumitomo Electric Industries, Ltd.Inventors: Hideo Itozaki, Keizo Harada, Naoji Fujimori, Shuji Yazu, Tetsuji Jodai
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Patent number: 5888658Abstract: A battery electrode substrate which is constituted of a porous metallic body structure having communicating pores at a porosity of at least 90% and an Fe/Ni multilayer structure wherein the skeletal portion of the porous metallic body is composed mainly of Fe and has an Ni covering layer on the surface thereof while pores communicating with the inside and outside of Fe skeletal portion exist in the Fe skeletal portion and the inside of the pores is covered with Ni. The electrode substrate is produced by applying an iron oxide powder of at most 20 .mu.m in an average particle size on a porous resin core body; heat treating the core to remove an organic resin component while simultaneously sintering Fe to obtain a porous Fe body; and then covering the Fe skeletal portion with Ni by electroplating. In this process, the iron oxide can be used in combination with carbon powder. Further, a nickel porous sintered body can also be produced using nickel oxide in place of iron oxide.Type: GrantFiled: February 27, 1998Date of Patent: March 30, 1999Assignees: Sumitomo Electric Industries, Ltd., Matsushita Electric Industrial Co., Ltd.Inventors: Keizo Harada, Kenichi Watanabe, Shosaku Yamanaka, Kiyoshi Hayashi, Nobuyasu Morishita, Hiroki Takeshima, Hideo Kaiya, Munehisa Ikoma
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Patent number: 5851599Abstract: A battery electrode substrate which is constituted of a porous metallic body structure having communicating pores at a porosity of at least 90% and an Fe/Ni multilayer structure wherein the skeletal portion of the porous metallic body is composed mainly of Fe and has an Ni covering layer on the surface thereof while pores communicating with the inside and outside of Fe skeletal portion exist in the Fe skeletal portion and the inside of the pores is covered with Ni. The electrode substrate is produced by applying an iron oxide powder of at most 20 .mu.m in an average particle size on a porous resin core body; heat treating the core to remove an organic resin component while simultaneously sintering Fe to obtain a porous Fe body; and then covering the Fe skeletal portion with Ni by electroplating. In this process, the iron oxide can be used in combination with carbon powder. Further, a nickel porous sintered body can also be produced using nickel oxide in place of iron oxide.Type: GrantFiled: September 20, 1996Date of Patent: December 22, 1998Assignees: Sumitomo Electric Industries Co., Ltd., Matsushita Electric Industrial Co., Ltd.Inventors: Keizo Harada, Kenichi Watanabe, Shosaku Yamanaka, Kiyoshi Hayashi, Nobuyasu Morishita, Hiroki Takeshima, Hideo Kaiya, Munehisa Ikoma
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Patent number: 5733684Abstract: An electrode substrate, for a battery, as a support for an active material used in a collector for a battery, comprising a metallic porous structure possessing interconnecting pores with a porosity of not less than 90% and a number of pores per cm of not less than 10 and having an Fe/Ni two-layer structure wherein Fe constitutes the interior of a skeleton of a porous body constituting the porous structure with the surface portion of the skeleton coated with Ni. Preferably, Fe constituting the interior of the skeleton has a purity of not less than 98% by weight, and the thickness of the nickel coating layer having an Fe content of not more than 10% by weight is 0.1 to 10 .mu.m. The ratio of thickness of the Fe-diffused layer to the thickness of the Ni coating layer is regulated to not more than 0.65 by forming a metallic porous body of Fe using a porous resin as a substrate, plating the metallic porous body with Ni, heat treating the plated body.Type: GrantFiled: May 23, 1996Date of Patent: March 31, 1998Assignee: Sumitomo Electric Industries, Ltd.Inventors: Keizo Harada, Kenichi Watanabe, Shosaku Yamanaka
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Patent number: 5712227Abstract: A substrate having a superconducting thin film of compound oxide thereon. An intermediate layer consists of at least one layer of copper-containing oxide is interposed between the substrate and the superconducting thin film.Type: GrantFiled: January 25, 1995Date of Patent: January 27, 1998Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kenjiro Higaki, Keizo Harada, Takashi Matsuura, Hitoshi Oyama, Hideo Itozaki, Shuji Yazu
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Patent number: 5672411Abstract: An insulating board having a substrate, and an insulating film of silicon oxide formed on the surface of the substrate by vapor phase deposition. In forming the film, the forming conditions are controlled so that the film is formed in an overhang or conformal shape at initial stage and then in a flow shape. Thereby, both good adhesion and excellent insulation properties are achieved.Type: GrantFiled: December 9, 1994Date of Patent: September 30, 1997Assignee: Sumitomo Electric Industries, Ltd.Inventors: Keizo Harada, Kenichi Watanabe, Shosaku Yamanaka
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Patent number: 5643834Abstract: A process for manufacturing a plastic package type semiconductor device composed of a rolled metal substrate made of copper or copper alloy and an insulating film formed on the surface of the substrate. The film may be a single-layer film made of silicon oxynitride or a composite film formed by laminating a silicon oxide layer and a silicon oxynitride layer (or a silicon nitride layer). A semiconductor element is mounted on the film or on the exposed surface of the substrate. Other passive elements are provided on the film. After connecting these elements with bonding wires, the entire device is sealed in a resin molding. This device is thus free of cracks due to difference in thermal expansion between the film and the substrate, or peeling due to moisture absorption.Type: GrantFiled: May 25, 1995Date of Patent: July 1, 1997Assignee: Sumitomo Electric Industries, Ltd.Inventors: Keizo Harada, Takao Maeda, Takatoshi Takikawa, Shunsuke Ban, Shosaku Yamanaka
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Patent number: 5640669Abstract: A process for preparing a metallic porous body, comprising: forming a layer comprising Cu, a Cu alloy, or a precursor thereof onto a skeleton composed of a porous resin body having a three-dimensional network, heat-treating the resin body with the layer formed thereon to remove a heat-decomposable organic component, thereby forming a porous metallic skeleton of Cu or a Cu alloy; and plating the surface of the Cu or Cu alloy skeleton with Ni or an Ni alloy. The heat treating may be carried out by direct induction heating. The metallic porous body is useful as electrodes for batteries, various filters, carriers for catalysts, etc. When the porous body is cut and used as the electrode substrate, the coating of an area, where Cu or its alloy has been exposed by cutting or the like, with a third metal having a lower ionization tendency than Cu or its alloy can provide an electrode substrate having better corrosion resistance and battery service life.Type: GrantFiled: December 4, 1995Date of Patent: June 17, 1997Assignee: Sumitomo Electric Industries, Ltd.Inventors: Keizo Harada, Masayuki Ishii, Kenichi Watanabe, Shosaku Yamanaka
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Patent number: 5597665Abstract: A porous metal body is produced by forming a coating film of one or more metal capable of forming a eutectic alloy at temperatures not higher than the melting point of Al on a foamed resin skeleton having a three-dimensional network structure according to the plating, vapor deposition, sputtering, CVD or other vapor phase process, impregnating the foamed resin having the coating film formed thereon with a paste comprising powdery Al, a binder and an organic solvent as principal components to thereby obtain a paste-coated composite and heating the composite at a temperature ranging from 550.degree. C. to 750.degree. C. in a nonoxidizing atmosphere. The resultant porous metal body has a large effective surface area and a high space utilization factor and exhibits excellent performance in uses in filters and battery plates.Type: GrantFiled: October 17, 1995Date of Patent: January 28, 1997Assignee: Sumitomo Electric Industries, Ltd.Inventors: Keizo Harada, Masayuki Ishii, Shosaku Yamanaka
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Patent number: 5468973Abstract: A stacked Josephson junction device includes a pair of copper oxide superconductor layers and a non-superconductor layer formed between the pair of oxide superconductor layers. The copper oxide superconductor layers are composed of a compound copper oxide having the composition expressed by the general formula:LnBa.sub.2 Cu.sub.3 O.sub.v(where Ln is Y or rare earth element and 6<v.ltoreq.7).The non-superconductor layer is composed of a chemical compound having the composition expressed by the general formula:Bi.sub.2 Y.sub.x Sr.sub.y Cu.sub.z O.sub.w(where x, y, z and w indicate ratio of components0.ltoreq.x.ltoreq.2,1.ltoreq.y.ltoreq.3,1.ltoreq.z.ltoreq.3,6.ltoreq.w.ltoreq.13.Type: GrantFiled: March 31, 1994Date of Patent: November 21, 1995Assignee: Sumitomo Electric Industries, Ltd.Inventors: Keizo Harada, Hideo Itozaki