Patents by Inventor Masakazu Kawahara

Masakazu Kawahara 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: 11242592
    Abstract: A continuous nitriding treatment furnace includes a nitriding chamber, a heater, a first nitriding zone, and a second nitriding zone lower in atmosphere gas temperature than the first nitriding zone by 25° C. to 150° C., the continuous nitriding treatment furnace being configured such that an atmosphere gas in the first nitriding zone flows into the second nitriding zone and being configured to execute a nitriding treatment that forms an iron nitride compound layer composed of an ? phase or of the ? phase and a ?? phase on a surface of the steel member in the first nitriding zone and precipitates the ?? phase in the iron nitride compound layer in the second nitriding zone.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: February 8, 2022
    Assignee: DOWA THERMOTECH CO., LTD.
    Inventors: Katsushige Shimizu, Hokuto Hatanaka, Bin Sun, Masakazu Kawahara
  • Publication number: 20190177829
    Abstract: A continuous nitriding treatment furnace includes a nitriding chamber, a heater, a first nitriding zone, and a second nitriding zone lower in atmosphere gas temperature than the first nitriding zone by 25° C. to 150° C., the continuous nitriding treatment furnace being configured such that an atmosphere gas in the first nitriding zone flows into the second nitriding zone and being configured to execute a nitriding treatment that forms an iron nitride compound layer composed of an ? phase or of the ? phase and a ?? phase on a surface of the steel member in the first nitriding zone and precipitates the ?? phase in the iron nitride compound layer in the second nitriding zone.
    Type: Application
    Filed: September 27, 2017
    Publication date: June 13, 2019
    Applicant: DOWA THERMOTECH CO., LTD.
    Inventors: Katsushige SHIMIZU, Hokuto HATANAKA, Bin SUN, Masakazu KAWAHARA
  • Publication number: 20110205178
    Abstract: An electronic device can operate in two operation modes of a “mouse mode” and a “tablet mode”. In the mouse mode, a program is executed in response to an input to a liquid crystal panel implemented by a display-integrated tablet. An operation screen of the program created as a result of execution of the program is displayed on a main screen. In the tablet mode, a program is executed in response to an input to the liquid crystal panel. An operation screen of the program generated as a result of execution of the program is displayed on the liquid crystal panel. In a sub application “book”, information on history of electronic books that have been selected so far for viewing on a book viewer is stored and a soft key indicative of each electronic book is displayed on the liquid crystal panel in the order in accordance with the history information.
    Type: Application
    Filed: October 27, 2009
    Publication date: August 25, 2011
    Inventors: Toshihiko Yoshida, Masakazu Kawahara, Yukihiro Kubo, Osamu Uratani
  • Publication number: 20110012905
    Abstract: An information processing apparatus includes: a display control unit for causing a display unit to display a reference circle arranged at a prescribed position and to display a moving graphic to be movable in accordance with a move command from an operation unit; a storage unit for storing a parameter in association with a position on a circumference of the reference circle; and a range deciding unit for calculating and outputting a parameter range corresponding to a portion of the circumference of the reference circle located within the moving graphic, based on a position of the moving graphic.
    Type: Application
    Filed: March 23, 2009
    Publication date: January 20, 2011
    Applicant: Sharp Kabushiki Kaisha
    Inventor: Masakazu Kawahara
  • Patent number: 7683009
    Abstract: The present invention provides a Bi2223 based thick film that does not peel off when a thermal or a mechanical shock is applied to a base or an oxide superconductor thick film or the like in the middle of a manufacturing process and a method of manufacturing the same. An oxide superconductor paste 1 having a mixing ratio of Bi2212 composition is applied to a base 3, dried, burned, and thereafter burned at a temperature approximate to its melting point to obtain a partially molten layer 4. Next, an oxide superconductor paste 2 having a mixing ratio of Bi2223 composition is applied to the partially molten layer 4, dried, burned, compressed by a CIP, and thereafter repeatedly burned and compressed for a predetermined number of times to obtain the base 3 having a desired superconductor thick film 5 formed thereon.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: March 23, 2010
    Assignees: Central Research Institute of Electric Power Industry, DOWA Electronics Materials Co., Ltd.
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado, Masatoyo Shibuya
  • Patent number: 7638463
    Abstract: To provide an oxide superconductor thick film formation method that can enhance adhesiveness of a Bi2223 thick film to a body to be processed on which the Bi2223 thick film is formed, and increase a cross-sectional area of the Bi2223 thick film, without a decrease in Jc of the Bi2223 thick film. A mixture of a compound oxide having composition Bi2212 and Pb is applied to a surface of the body to be processed, and burned to form a first thick film. An oxide superconductor thick film expressed by a general formula (Bi, Pb)2+aSr2Ca2Cu3OZ (where ?0.1?a?0.5) is formed on the first thick film.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: December 29, 2009
    Assignees: DOWA Electronics Materials Co., Ltd., Central Research Institute of Electric Power Industry
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado
  • Publication number: 20090036314
    Abstract: To provide an oxide superconductor thick film formation method that can enhance adhesiveness of a Bi2223 thick film to a body to be processed on which the Bi2223 thick film is formed, and increase a cross-sectional area of the Bi2223 thick film, without a decrease in Jc of the Bi2223 thick film. A mixture of a compound oxide having composition Bi2212 and Pb is applied to a surface of the body to be processed, and burned to form a first thick film. An oxide superconductor thick film expressed by a general formula (Bi, Pb)2+aSr2Ca2Cu3OZ (where ?0.1?a?0.5) is formed on the first thick film.
    Type: Application
    Filed: December 15, 2006
    Publication date: February 5, 2009
    Applicants: DOWA ELECTRONICS MATERIAL CO, CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado
  • Patent number: 7309511
    Abstract: The present invention provides an oxide superconductor thick film which is formed on a substrate or a board and has a high Jc and Ic and a method for manufacturing the same. Predetermined amounts of materials containing elements of Bi, Pb, Sr, Ca and Cu are weighed, mixed and subjected to steps of calcining, milling, and drying, and thereafter an organic binder and an organic vehicle are added thereto to prepare a (Bi, Pb)2+aSr2Ca2Cu3O2 superconductive paste, which is applied to the surface of a substrate or a board in a thickness of 260 ?m or more and dried. Thereafter, the paste is first subjected to burning at temperatures of 835° C. to 840° C. for 100 hours, then pressurization, and further burning at temperatures of 835° C. to 840° C. for 100 hours, thereby preparing an oxide superconductor thick film having a film thickness of 130 ?m or more having a high Jc and Ic.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: December 18, 2007
    Assignees: Dowa Electronics Materials Co., Ltd, Central Research Institute of Electric Power Industry
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado, Masatoyo Shibuya
  • Publication number: 20070142232
    Abstract: The present invention provides a Bi2223 based thick film that does not peel off when a thermal or a mechanical shock is applied to a base or an oxide superconductor thick film or the like in the middle of a manufacturing process and a method of manufacturing the same. An oxide superconductor paste 1 having a mixing ratio of Bi2212 composition is applied to a base 3, dried, burned, and thereafter burned at a temperature approximate to its melting point to obtain a partially molten layer 4. Next, an oxide superconductor paste 2 having a mixing ratio of Bi2223 composition is applied to the partially molten layer 4, dried, burned, compressed by a CIP, and thereafter repeatedly burned and compressed for a predetermined number of times to obtain the base 3 having a desired superconductor thick film 5 formed thereon.
    Type: Application
    Filed: October 16, 2006
    Publication date: June 21, 2007
    Applicants: DOWA MINING CO., LTD., CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado, Masatoyo Shibuya
  • Publication number: 20060078670
    Abstract: The present invention provides an oxide superconductor thick film which is formed on a substrate or a board and has a high Jc and Ic and a method for manufacturing the same. Predetermined amounts of materials containing elements of Bi, Pb, Sr, Ca and Cu are weighed, mixed and subjected to steps of calcining, milling, and drying, and thereafter an organic binder and an organic vehicle are added thereto to prepare a (Bi, Pb)2+aSr2Ca2Cu3O2 superconductive paste, which is applied to the surface of a substrate or a board in a thickness of 260 ?m or more and dried. Thereafter, the paste is first subjected to burning at temperatures of 835° C. to 840° C. for 100 hours, then pressurization, and further burning at temperatures of 835° C. to 840° C. for 100 hours, thereby preparing an oxide superconductor thick film having a film thickness of 130 ?m or more having a high Jc and Ic.
    Type: Application
    Filed: May 20, 2005
    Publication date: April 13, 2006
    Applicants: Dowa Mining Co., Ltd., Central Research Institute of Electric Power Industry
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado, Masatoyo Shibuya
  • Publication number: 20050170969
    Abstract: The present invention provides an oxide superconductor thick film which is formed on a substrate or a board and has a high Jc and Ic and a method for manufacturing the same. Predetermined amounts of materials containing elements of Bi, Pb, Sr, Ca and Cu are weighed, mixed and subjected to steps of calcining, milling, and drying, and thereafter an organic binder and an organic vehicle are added thereto to prepare a (Bi, Pb)2+aSr2Ca2Cu3Oz superconductive paste, which is applied to the surface of a substrate or a board in a thickness of 260 ?m or more and dried. Thereafter, the paste is first subjected to burning at temperatures of 835° C. to 840° C. for 100 hours, then pressurization, and further burning at temperatures of 835° C. to 840° C. for 100 hours, thereby preparing an oxide superconductor thick film having a film thickness of 130 ?m or more having a high Jc and Ic.
    Type: Application
    Filed: September 16, 2004
    Publication date: August 4, 2005
    Applicants: Dowa Mining Co., Ltd., Central Research Institute of Electric Power Industry
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado, Masatoyo Shibuya
  • Patent number: 6809042
    Abstract: The present invention provides an oxide superconductor thick film which is formed on a substrate or a board and has a high Jc and Ic and a method for manufacturing the same. Predetermined amounts of materials containing elements of Bi, Pb, Sr, Ca and Cu are weighed, mixed and subjected to steps of calcining, milling, and drying, and thereafter an organic binder and an organic vehicle are added thereto to prepare a (Bi, Pb)2+aSr2Ca2Cu3Oz, superconductive paste, which is applied to the surface of a substrate or a board in a thickness of 260 &mgr;m or more and dried. Thereafter, the paste is first subjected to burning at temperatures of 835° C. to 840° C. for 100 hours, then pressurization, and further burning at temperatures of 835° C. to 840° C. for 100 hours, thereby preparing an oxide superconductor thick film having a film thickness of 130 &mgr;m or more having a high Jc and Ic.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: October 26, 2004
    Assignees: Dowa Mining Co., Ltd., Central Research Institute of Electric Power Industry
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado, Masatoyo Shibuya
  • Publication number: 20040110641
    Abstract: The present invention provides a Bi2223 based thick film that does not peel off when a thermal or a mechanical shock is applied to a base or an oxide superconductor thick film or the like in the middle of a manufacturing process and a method of manufacturing the same An oxide superconductor paste 1 having a mixing ratio of Bi2212 composition is applied to a base 3, dried, burned, and thereafter burned at a temperature approximate to its melting point to obtain a partially molten layer 4. Next, an oxide superconductor paste 2 having a mixing ratio of Bi2223 composition is applied to the partially molten layer 4, dried, burned, compressed by a CIP, and thereafter repeatedly burned and compressed for a predetermined number of times to obtain the base 3 having a desired superconductor thick film 5 formed thereon.
    Type: Application
    Filed: July 31, 2003
    Publication date: June 10, 2004
    Applicants: DOWA MINING CO., LTD., CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado, Masatoyo Shibuya
  • Publication number: 20030096709
    Abstract: The present invention provides an oxide superconductor thick film which is formed on a substrate or a board and has a high Jc and Ic and a method for manufacturing the same. Predetermined amounts of materials containing elements of Bi, Pb, Sr, Ca and Cu are weighed, mixed and subjected to steps of calcining, milling, and drying, and thereafter an organic binder and an organic vehicle are added thereto to prepare a (Bi, Pb)2+aSr2Ca2Cu3Oz, superconductive paste, which is applied to the surface of a substrate or a board in a thickness of 260 &mgr;m or more and dried. Thereafter, the paste is first subjected to burning at temperatures of 835° C. to 840° C. for 100 hours, then pressurization, and further burning at temperatures of 835° C. to 840° C. for 100 hours, thereby preparing an oxide superconductor thick film having a film thickness of 130 &mgr;m or more having a high Jc and Ic.
    Type: Application
    Filed: August 26, 2002
    Publication date: May 22, 2003
    Applicant: DOWA MINING CO., LTD.
    Inventors: Masahiro Kojima, Masakazu Kawahara, Michiharu Ichikawa, Hiroyuki Kado, Masatoyo Shibuya