Patents by Inventor Tatsuo Nagashima

Tatsuo Nagashima 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).

  • Publication number: 20180141851
    Abstract: Provided is an optical glass having a high refractive index, a low density, and good manufacturing properties. An optical glass having: a refractive index (nd) of 1.68 to 1.85; a density (d) of 4.0 g/cm3 or less; and a temperature where a viscosity of glass becomes log ?=2 of 950 to 1200° C., and an optical component using the optical glass are provided. This optical glass has the high refractive index, the low density, and the good manufacturing properties, and is suitable as the optical glass of wearable equipment, for a vehicle mounting, for a robot mounting, and so on.
    Type: Application
    Filed: January 3, 2018
    Publication date: May 24, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shin-ichi Amma, Tatsuo Nagashima, Shusaku Akiba
  • Publication number: 20160336819
    Abstract: A stator includes a stator core, an insulating body, a coil, and a resin-molded product. The stator core includes a circumferentially side surface and an axially upper surface. The insulating body includes a side wall and an upper wall. The side wall covers the circumferentially side surface of the stator core. The upper wall covers the axially upper surface of the stator core. A radially inner side end surface of the upper wall is positioned farther toward a radially outer side than a radially inner side end surface of the side wall. The resin-molded product covers the coil.
    Type: Application
    Filed: January 16, 2015
    Publication date: November 17, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kentaro Haruno, Tomohiko Miyamoto, Tatsuo Nagashima
  • Publication number: 20160075592
    Abstract: There are provided a glass composition suitable for an optical conversion member containing phosphor particles low in heat resistance, an optical conversion member using the glass composition, and an illumination light source using the optical conversion member. A glass composition comprising, in mol % based on oxides, 5 to 35% of Bi2O3, 22 to 80% of B2O3, 10 to 48% of ZnO, and 0 to 4% of Al2O3, and not substantially containing SiO2, wherein a total amount of the Bi2O3 and the ZnO being 15% or more and less than 70%, an optical conversion member using the glass composition, an illumination light source using the optical conversion member, and a liquid crystal display device using the illumination light source are provided.
    Type: Application
    Filed: November 20, 2015
    Publication date: March 17, 2016
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Tatsuo NAGASHIMA, Masamichi TANIDA, Syuji MATSUMOTO, Tomoharu HASEGAWA
  • Patent number: 8691711
    Abstract: Glass for a display device, which comprises, as represented by mole percentage based on the following oxides, from 61 to 72% of SiO2, from 8 to 17% of Al2O3, from 6 to 18% of Li2O, from 2 to 15% of Na2O, from 0 to 8% of K2O, from 0 to 6% of MgO, from 0 to 6% of CaO, from 0 to 4% of TiO2, and from 0 to 2.5% of ZrO2, and having a total content R2O of Li2O, Na2O and K2O of from 15 to 25%, a ratio Li2O/R2O of the Li2O content to R2O of from 0.35 to 0.8, and a total content of MgO and CaO of from 0 to 9%.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: April 8, 2014
    Assignee: Asahi Glass Company, Limited
    Inventors: Tetsuya Nakashima, Seiki Ohara, Tatsuo Nagashima
  • Publication number: 20130324389
    Abstract: The present invention relates to a glass composition including, in terms of mol % on the basis of oxides: from 55 to 70% of SiO2, from 5 to 10% of Al2O3, from 0 to 0.5% of B2O3, from 3 to 15% of MgO, from 3 to 15% of CaO, from 2 to 10% of SrO, from 1 to 10% of BaO, from 0 to 3% of ZrO2, from 0 to 1.8% of Na2O, and from 0 to 1% of K2O, provided that MgO+CaO+SrO+BaO is from 20 to 35%, and Na2O+K2O is from 0 to 2%, in which the glass composition has a glass transition temperature of 680° C. or higher, an average thermal expansion coefficient of from 50×10?7 to 70×10?7/° C., and a temperature at which a viscosity is 102 dPa·s of 1,600° C. or lower.
    Type: Application
    Filed: August 6, 2013
    Publication date: December 5, 2013
    Applicant: Asahi Glass Company, Limited
    Inventors: Tatsuo NAGASHIMA, Yuki KONDO, Manabu NISHIZAWA, Akio KOIKE
  • Patent number: 8563149
    Abstract: To provide glass for a data storage medium substrate, whereby high heat resistance can be obtained. Glass for a data storage medium substrate, which comprises, as represented by mol percentage based on the following oxides, from 55 to 70% of SiO2, from 2.5 to 9% of Al2O3, from 0 to 10% of MgO, from 0 to 7% of CaO, from 0.5 to 10% of SrO, from 0 to 12.5% of BaO, from 0 to 2.5% of TiO2, from 0.5 to 3.7% of ZrO2, from 0 to 2.5% of Li2O, from 0 to 8% of Na2O, from 2 to 8% of K2O and from 0.5 to 5% of La2O3, provided that the total content of Al2O3 and ZrO2 (Al2O3+ZrO2) is at most 12%, and the total content of Li2O, Na2O and K2O (R2O) is at most 12%.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: October 22, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Tatsuo Nagashima, Kensuke Nagai, Tetsuya Nakashima, Kei Maeda
  • Publication number: 20120199203
    Abstract: Provided are a glass sheet for a CIGS solar cell which satisfies both of high power generation efficiency and high glass transition temperature, and a CIGS solar cell having high power generation efficiency. A glass sheet for a Cu—In—Ga—Se solar cell containing, in terms of mol % on the basis of the following oxides, 60 to 75% of SiO2, 3 to 10% of Al2O3, 0 to 3% of B2O3, 5 to 18% of MgO, 0 to 5% of CaO, 4 to 18.5% of Na2O, 0 to 17% of K2O, and 0% or more and less than 10% of SrO+BaO+ZrO2, wherein K2O/(Na2O+K2O) is 0 to 0.5, and the glass sheet has a glass transition temperature (Tg) of more than 550° C.
    Type: Application
    Filed: April 18, 2012
    Publication date: August 9, 2012
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Manabu Nishizawa, Yuichi Kuroki, Tatsuo Nagashima, Yasushi Kawamoto, Shigeru Niki, Shogo Ishizuka
  • Patent number: 8168313
    Abstract: A glass for an information recording medium substrate, which comprises, as represented by mol % based on the following oxides, from 61 to 72% of SiO2, from 3 to 11% of Al2O3, from 0 to 14.3% of Li2O, from 0 to 22% of Na2O, from 0 to 22% of K2O, from 4 to 13% of MgO, from 0 to 6% of TiO2 and from 0 to 5% of ZrO2, provided that the total content of Li2O, Na2O and K2O (R2O) is from 10 to 22%, and (a) the ratio of the content of Li2O to R2O (Li2O/R2O) is at most 0.52, (b) the ratio of the content of Na2O to R2O (Na2O/R2O) is at least 0.35, or (c) the ratio of the content of K2O to R2O (K2O/R2O) is at least 0.45.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: May 1, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Jun Endo, Tatsuo Nagashima, Tetsuya Nakashima, Manuel Diaz Reyes
  • Publication number: 20110312483
    Abstract: Glass for a display device, which comprises, as represented by mole percentage based on the following oxides, from 61 to 72% of SiO2, from 8 to 17% of Al2O3, from 6 to 18% of Li2O, from 2 to 15% of Na2O, from 0 to 8% of K2O, from 0 to 6% of MgO, from 0 to 6% of CaO, from 0 to 4% of TiO2, and from 0 to 2.5% of ZrO2, and having a total content R2O of Li2O, Na2O and K2 O of from 15 to 25%, a ratio Li2O/R2O of the Li2O content to R2O of from 0.35 to 0.8, and a total content of MgO and CaO of from 0 to 9%.
    Type: Application
    Filed: May 25, 2011
    Publication date: December 22, 2011
    Applicant: Asahi Glass Company, Limited
    Inventors: Tetsuya NAKASHIMA, Seiki OHARA, Tatsuo NAGASHIMA
  • Publication number: 20110265863
    Abstract: The present invention provides a solar cell having high photovoltaical conversion efficiency and being excellent in the light transmissivity and weather resistance such as solarization resistance. The present invention relates to a solar cell comprising a double tube composed of two glass tubes differing in the diameter and a photovoltaic conversion layer formed between the two glass tubes, the double tube being sealed at both ends of a part in which the photovoltaic conversion layer is formed, wherein at least one of the two glass tubes is composed of a glass comprising, in mass % based on the oxides, from 60 to 75% of SiO2, from 4 to 10% of Al2O3, from 0 to 5% of B2O3, from 0 to 5% of MgO, from 0.5 to 5% of CaO, from 0 to 0.5% of SrO, from 0 to 11% of BaO, from 10 to 16% of Na2O, from 0 to 10% of K2O, and from 0.5 to 10% of ZrO2.
    Type: Application
    Filed: April 27, 2011
    Publication date: November 3, 2011
    Applicant: Asahi Glass Company, Limited
    Inventors: Tatsuo NAGASHIMA, Toshinari Watanabe, Yuichi Kuroki
  • Publication number: 20110152058
    Abstract: To provide glass for a data storage medium substrate, whereby high heat resistance can be obtained. Glass for a data storage medium substrate, which comprises, as represented by mol percentage based on the following oxides, from 55 to 70% of SiO2, from 2.5 to 9% of Al2O3, from 0 to 10% of MgO, from 0 to 7% of CaO, from 0.5 to 10% of SrO, from 0 to 12.5% of BaO, from 0 to 2.5% of TiO2, from 0.5 to 3.7% of ZrO2, from 0 to 2.5% of Li2O, from 0 to 8% of Na2O, from 2 to 8% of K2O and from 0.5 to 5% of La2O3, provided that the total content of Al2O3 and ZrO2 (Al2O3+ZrO2) is at most 12%, and the total content of Li2O, Na2O and K2O (R2O) is at most 12%.
    Type: Application
    Filed: March 3, 2010
    Publication date: June 23, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Tatsuo NAGASHIMA, Kensuke Nagai, Tetsuya Nakashima, Kei Maeda
  • Publication number: 20110151282
    Abstract: The present invention relates to a method for manufacturing a glass substrate for data storage mediums, the method including a chemical strengthening treatment step of dipping a glass for a substrate in a mixed molten salt to form a compressive layer on front and back surfaces of the glass for a substrate, in which the glass for a substrate contains a lithium ion as an alkali component, the mixed molten salt contains sodium nitrate, potassium nitrate and lithium nitrate, an amount of lithium nitrate being from 1 to 6% by mass, and the glass for a substrate is dipped in the mixed molten salt at a treatment temperature of 325° C. or more and 475° C. or less for a treatment time of 30 minutes or less, under the requirement satisfying the following formula: 1900?T×log(t2)?2900, in which T is a treatment temperature (unit: K) and t is a treatment time (unit: second).
    Type: Application
    Filed: December 14, 2010
    Publication date: June 23, 2011
    Applicant: Asahi Glass Company, Limited
    Inventor: Tatsuo NAGASHIMA
  • Publication number: 20110135963
    Abstract: The present invention relates to a method for manufacturing a glass substrate for data storage mediums, the method including a chemical strengthening treatment step of dipping a glass for a substrate including, in terms of mol % on the basis of oxides, from 58 to 66% of SiO2, from 9 to 15% of Al2O3, from 7 to 15% of Li2O and from 2 to 9% of Na2O, provided that Li2O+Na2O is from 13 to 21%, in a mixed molten salt to form a compressive layer on front and back surfaces of the glass for a substrate, in which the mixed molten salt includes, in terms of mass percent, from 1 to 7.5% of lithium nitrate, from 28 to 55% of sodium nitrate and from 40 to 69% of potassium nitrate.
    Type: Application
    Filed: December 7, 2010
    Publication date: June 9, 2011
    Applicant: ASAHI GLASS COMPANY. LIMITED
    Inventors: Tatsuo NAGASHIMA, Tetsuya Nakashima
  • Publication number: 20100255350
    Abstract: To provide glass for an information recording medium substrate, which is excellent in the acid resistance and weather resistance. Glass for an information recording medium substrate, which comprises, as represented by mol % based on the following oxides, from 61 to 72% of SiO2, from 3 to 12% of Al2O3, from 0 to 14.3 of Li2O, from 0 to 22% of Na2O, from 0 to 22% of K2O, from 4 to 13% of MgO, from 0 to 6% of TiO2 and from 0 to 5% of ZrO2, provided that the total content of Li2O, Na2O and K2O (R2O) is from 8 to 22%, the ratio of the content of Li2O to R2O (Li2O/R2O) is at most 0.52, the ratio of the content of Na2O to R2O (Na2O/R2O) is at least 0.35, or the ratio of the content of K2O to R2O (K2O/R2O) is at least 0.45.
    Type: Application
    Filed: March 16, 2010
    Publication date: October 7, 2010
    Applicant: Asahi Glass Company, Limited
    Inventors: Jun ENDO, Tatsuo Nagashima, Tetsuya Nakashima, Manuel Diaz Reyes
  • Patent number: 7803472
    Abstract: To provide a substrate glass for data storage medium which is excellent in weather resistance even when no additional treatment such as chemical reinforcement treatment is applied and less susceptible to a whitening phenomenon and which has a glass transition temperature of at least 680° C. and is excellent in acid resistance. A substrate glass for data storage medium, which comprises, as represented by mass %, from 47 to 60% of SiO2, from 8 to 20% of Al2O3, from 0 to 8% of MgO, from 0 to 6% of CaO, from 1 to 18% of SrO, from 0 to 13% of BaO, from 1 to 6% of TiO2, from 1 to 5% of ZrO2, from 2 to 8% of Na2O and from 1 to 15% of K2O and which has a glass transition temperature of at least 680° C.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: September 28, 2010
    Assignee: Asahi Glass Company, Limited
    Inventors: Kensuke Nagai, Tetsuya Nakashima, Kei Maeda, Tatsuo Nagashima
  • Patent number: 7754356
    Abstract: To provide glass for a data storage medium substrate, whereby high heat resistance can be obtained. Glass for a data storage medium substrate, which comprises, as represented by mol percentage based on the following oxides, from 55 to 70% of SiO2, from 2.5 to 9% of Al2O3, from 0 to 10% of MgO, from 0 to 7% of CaO, from 0.5 to 10% of SrO, from 0 to 12.5% of BaO, from 0 to 2.5% of TiO2, from 0.5 to 3.7% of ZrO2, from 0 to 2.5% of Li2O, from 0 to 8% of Na2O, from 2 to 8% of K2O and from 0.5 to 5% of La2O3, provided that the total content of Al2O3and ZrO2(Al2O3+ZrO2) is at most 12%, and the total content of Li2O, Na2O and K2O (R2O) is at most 12%.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: July 13, 2010
    Assignee: Asahi Glass Company, Limited
    Inventors: Tatsuo Nagashima, Kensuke Nagai, Tetsuya Nakashima, Kei Maeda
  • Publication number: 20090239102
    Abstract: To provide glass for a data storage medium substrate, whereby high heat resistance can be obtained. Glass for a data storage medium substrate, which comprises, as represented by mol percentage based on the following oxides, from 55 to 70% of SiO2, from 2.5 to 9% of Al2O3, from 0 to 10% of MgO, from 0 to 7% of CaO, from 0.5 to 10% of SrO, from 0 to 12.5% of BaO, from 0 to 2.5% of TiO2, from 0.5 to 3.7% of ZrO2, from 0 to 2.5% of Li2O, from 0 to 8% of Na2O, from 2 to 8% of K2O and from 0.5 to 5% of La2O3, provided that the total content of Al2O3 and ZrO2 (Al2O3+ZrO2) is at most 12%, and the total content of Li2O, Na2O and K2O (R2O) is at most 12%.
    Type: Application
    Filed: June 3, 2009
    Publication date: September 24, 2009
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Tatsuo NAGASHIMA, Kensuke Nagai, Tetsuya Nakashima, Kei Maeda
  • Publication number: 20090239035
    Abstract: To provide a substrate glass for data storage medium which is excellent in weather resistance even when no additional treatment such as chemical reinforcement treatment is applied and less susceptible to a whitening phenomenon and which has a glass transition temperature of at least 680° C. and is excellent in acid resistance. A substrate glass for data storage medium, which comprises, as represented by mass %, from 47 to 60% of SiO2, from 8 to 20% of Al2O3, from 0 to 8% of MgO, from 0 to 6% of CaO, from 1 to 18% of SrO, from 0 to 13% of BaO, from 1 to 6% of TiO2, from 1 to 5% of ZrO2, from 2 to 8% of Na2O and from 1 to 15% of K2O and which has a glass transition temperature of at least 680° C.
    Type: Application
    Filed: June 3, 2009
    Publication date: September 24, 2009
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Kensuke Nagai, Tetsuya Nakashima, Kei Maeda, Tatsuo Nagashima
  • Patent number: 7524781
    Abstract: A non-lead optical glass consisting essentially of, as represented by mol %, from 45 to 75% of Bi2O3, from 12 to 45% of B2O3, from 1 to 20% of Ga2O3, from 1 to 20% of In2O3, from 0 to 20% of ZnO, from 0 to 15% of BaO, from 0 to 15% of SiO2+Al2O3+GeO2, from 0 to 15% of MgO+CaO+SrO, from 0 to 10% of SnO2+TeO2+TiO2+ZrO2+Ta2O3+Y2O3+WO3 and from 0 to 5% of CeO2, wherein Ga2O3+In2O3+ZnO?5%. An optical fiber comprising the above non-lead optical glass as a core.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: April 28, 2009
    Assignee: Asahi Glass Company, Limited
    Inventors: Tatsuo Nagashima, Naoki Sugimoto, Seiki Ohara, Tomoharu Hasegawa
  • Publication number: 20090095024
    Abstract: To provide a process for producing an air cladding type optical fiber by a method other than extrusion molding. A process for producing an optical fiber comprising a hollow glass fiber with an optical transmission glass held to extend in its axial direction at its center, which process comprises a step of heating and drawing a glass rod having three or more holes with an equal diameter provided around its center axis to extend in its axial direction where the distance between each hole and the axis is mutually equal and the distance between adjacent holes is mutually equal, and a portion surrounded by such holes will constitute said optical transmission glass, while applying pressure to expand the holes with one end of the rod closed, to form a preform wherein glass between the holes is in a plate form, and subjecting the preform to wire drawing to form an optical fiber in which said optical transmission glass is held by plate glass.
    Type: Application
    Filed: November 17, 2008
    Publication date: April 16, 2009
    Applicant: Asahi Glass Company, Limited
    Inventors: Tatsuo NAGASHIMA, Tomoharu Hasegawa, Seiki Ohara, Naoki Sugimoto