Patents by Inventor Takashi Mukuno
Takashi Mukuno 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: 8043535Abstract: It is an object of the present invention to provide a conductive ink which enables to form a circuit or the like having excellent adhesion to a substrate and to form a conductor having high film density and low electric resistance. In order to attain the object, a conductive ink comprising metal powder or metal oxide powder dispersed in a dispersion medium, which is characterized in that the dispersion medium contains a metal salt or a metal oxide as a film density improver for increasing film density of a conductor formed by using the conductive ink is adopted. A main solvent constituting the dispersion medium is selected from one or a combination of two or more selected from the group consisting of water, alcohols, glycols and saturated hydrocarbons having a boiling point of 300 deg. C. or less at normal pressure.Type: GrantFiled: December 26, 2005Date of Patent: October 25, 2011Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Yoichi Kamikoriyama, Sumikazu Ogata, Kei Anai, Hiroki Sawamoto, Mikimasa Horiuchi, Takashi Mukuno, Katsuhiko Yoshimaru
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Publication number: 20090014694Abstract: The present invention is directed at providing fine nickel particles with a sharp particle size distribution, and providing an electroconductive paste using the nickel particles. In order to obtain the nickel particles capable of achieving the purpose, a method for producing the nickel particle by elevating a temperature of the reactive solution containing a nickel salt and a polyol to a reduction temperature, and reducing the nickel salt in the reactive solution which is characterized in that the reactive solution is prepared to contain a carboxylic acid or an amine having a carboxyl functional group and/or an amino functional group, and a precious metal catalyst before the solution temperature is elevated to the reduction temperature. Nickel particles obtained with the production method have an average image analytical particle diameter of 1 nm to 300 nm.Type: ApplicationFiled: June 30, 2006Publication date: January 15, 2009Applicant: Mitsui Mining & Smelting Co., LtdInventors: Takashi Mukuno, Katsuhiko Yoshimaru
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Publication number: 20080134936Abstract: It is an object of the present invention to provide a conductive ink which enables to form a circuit or the like having excellent adhesion to a substrate and to form a conductor having high film density and low electric resistance. In order to attain the object, a conductive ink comprising metal powder or metal oxide powder dispersed in a dispersion medium, which is characterized in that the dispersion medium contains a metal salt or a metal oxide as a film density improver for increasing film density of a conductor formed by using the conductive ink is adopted. A main solvent constituting the dispersion medium is selected from one or a combination of two or more selected from the group consisting of water, alcohols, glycols and saturated hydrocarbons having a boiling point of 300 deg. C. or less at normal pressure.Type: ApplicationFiled: December 26, 2005Publication date: June 12, 2008Applicant: Mitsui Mining & Smelting Co., Ltd.Inventors: Yoichi Kamikoriyama, Sumikazu Ogata, Kei Anai, Hiroki Sawamoto, Mikimasa Horiuchi, Takashi Mukuno, Katsuhiko Yoshimaru
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Patent number: 6682776Abstract: Herein disclosed is surface-modified nickel fine powder in which a precursor of barium titanate having a perovskite structure and consisting of a reaction product of a soluble titanium-containing compound and a soluble barium-containing compound is adhered to the surface of individual nickel fine particles, wherein the fine powder shows X-ray diffraction peaks of nickel and is free of any peak of barium titanate having a perovskite structure in the X-ray diffraction pattern determined by the X-ray diffraction method, but the fine powder shows X-ray diffraction peaks of both nickel and barium titanate having a perovskite structure in the X-ray diffraction pattern after the fine powder is subjected to a heat-treatment at a temperature of not less than 400° C. The nickel fine powder has a small heat shrinkage factor upon firing and improved resistance to oxidation.Type: GrantFiled: December 13, 2002Date of Patent: January 27, 2004Assignee: Mitsui Mining and Smelting Co., Ltd.Inventors: Takayuki Araki, Takashi Mukuno
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Patent number: 6632265Abstract: The nickel powder is characterized in that the rate of the nickel particles whose particle size is not less than 1.2 time the average particle size as determined by the observation with an SEM is not more than 5% of the total number of nickel particles and that the rate of nickel particles whose particle size is not more than 0.8 time the average particle size is not more than 5% of the total number of nickel particles. The nickel powder is produced by bringing a slurry, containing nickel hydroxide, which is prepared by adding an aqueous solution of a nickel salt to an aqueous solution of an alkali metal hydroxide, into contact with a hydrazine reducing agent under the temperature conditions of not less than 55° C. to reduce the nickel hydroxide.Type: GrantFiled: October 9, 2001Date of Patent: October 14, 2003Assignee: Mitsui Mining and Smelting Co., Ltd.Inventors: Takashi Mukuno, Takayuki Araki, Yoshiharu Toshima
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Publication number: 20030118723Abstract: Herein disclosed is surface-modified nickel fine powder in which a precursor of barium titanate having a perovskite structure and consisting of a reaction product of a soluble titanium-containing compound and a soluble barium-containing compound is adhered to the surface of individual nickel fine particles, wherein the fine powder shows X-ray diffraction peaks of nickel and is free of any peak of barium titanate having a perovskite structure in the X-ray diffraction pattern determined by the X-ray diffraction method, but the fine powder shows X-ray diffraction peaks of both nickel and barium titanate having a perovskite structure in the X-ray diffraction pattern after the fine powder is subjected to a heat-treatment at a temperature of not less than 400° C.Type: ApplicationFiled: December 13, 2002Publication date: June 26, 2003Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Takayuki Araki, Takashi Mukuno
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Patent number: 6494931Abstract: The present invention relates to nickel powder characterized in that the rate of the nickel particles whose particle size is not less than 1.2 time the average particle size as determined by the observation with an SEM is not more than 5% of the total number of nickel particles, that the rate of nickel particles whose particle size is not more than 0.8 time the average particle size is not more than 5% of the total number of nickel particles and that the tap density of the nickel powder is not less than 2.5 g/cm3, as well as a conductive paste for use in making a multilayer ceramic capacitor. The nickel powder of the present invention has a narrow particle size distribution and an excellent packing ability in a conductive paste and is particularly suitably used for forming a thin and uniform inner electrode for a multilayer ceramic capacitor, without being accompanied by the formation of any crack and/or the generation of any delamination.Type: GrantFiled: October 17, 2001Date of Patent: December 17, 2002Assignee: Mitsui Mining and Smelting Co., Ltd.Inventors: Takashi Mukuno, Takayuki Araki, Yoshiharu Toshima
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Patent number: 6452322Abstract: A getter supporter of a cathode-ray tube according to the present invention comprises a mounting portion to be fixed to an inside of the cathode-ray tube at one end thereof, a getter holder for holding a getter at the other end thereof, and a spring portion for connecting the mounting portion and the getter holder, in which a contact support portion contacting with the inner surface of the funnel is provided on the spring portion at a position spaced apart in the longitudinal direction from the position of the getter holder. Accordingly, fine cracks of the funnel glass due to heat generation of the getter at getter flashing and heat generation of the contact support portion due to high frequency for heating can be prevented, and also the deformation of the getter supporter by the heat conducted to the contact support portion and the spring pressure can be prevented.Type: GrantFiled: November 18, 1999Date of Patent: September 17, 2002Assignee: Sony CorporationInventors: Takashi Mukuno, Tetsuhiko Makino, Tsutomu Suehiro
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Publication number: 20010038880Abstract: A method and an apparatus for coating interior carbon on the inner surface of cathode ray tube funnels by the flow coating process, being capable of coating the interior carbon so as to avoid adhesion thereof onto the projected portion of the anode button, and so as to ensure electrical connection between the interior carbon and the anode button will be provided. In the method, the air is spot-blown around the anode button provided inside the funnel at least when the interior carbon injected onto the inner surface of the funnel flows down to reach such anode button, to thereby prevent the interior carbon from adhering to the projected portion of such anode button.Type: ApplicationFiled: March 12, 2001Publication date: November 8, 2001Inventors: Takashi Mukuno, Yoshimitsu Kato, Takenobu Kawai, Syouichi Hamase