Patents by Inventor Seiki Ohara

Seiki Ohara 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: 20150111030
    Abstract: A process for producing a chemically strengthened glass is provided. The method for producing a chemically strengthened glass includes subjecting a phase-separated glass to an ion exchange treatment. A chemically strengthened glass which is obtained by the process and a phase-separated glass which has been subjected to the ion exchange treatment are also provided.
    Type: Application
    Filed: October 27, 2014
    Publication date: April 23, 2015
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Junko MIYASAKA, Takahiro SAKAGAMI, Seiki OHARA, Kosho AKATSUKA, Manuel Diaz REYES, Kazutaka ONO, Hiroyuki HIJIYA
  • Publication number: 20140370264
    Abstract: The present invention provides a cover glass for a display, having high durability to slow cracking and strong abraded strength even though a compressive stress is large and a depth of a compressive stress layer is deep. The present invention relates to a cover glass for a display, in which a depth of a compressive stress layer (DOL) is 30 ?m or more, a surface compressive stress is 300 MPa or more, a position (HW) at which a compressive stress is half of a value of the surface compressive stress is a position of 8 ?m or more from a glass surface, and the depth of the compressive stress layer (DOL) and the position (HW) at which the compressive stress is half of the value of the surface compressive stress satisfy the following formula: 0.05?HW/DOL?0.23??(1).
    Type: Application
    Filed: June 11, 2014
    Publication date: December 18, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Seiki OHARA, Kazutaka Ono, Tetsuya Nakashima, Hiroyuki Ohkawa
  • Publication number: 20140364298
    Abstract: A Glass for chemical tempering, which includes, as represented by mole percentage based on the following oxides, from 60 to 75% of SiO2, from 5 to 15% of Al2O3, more than 7 and at most 12% of MgO, from 0 to 3% of CaO, from 0 to 3% of ZrO2, from 10 to 20% of Li2O, from 0 to 8% of Na2O and from 0 to 5% of K2O, and has a total content R2O of Li2O, Na2O and K2O of at most 25%, and a ratio Li2O/R2O of the Li2O content to R2O of from 0.5 to 1.0.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 11, 2014
    Applicant: Asahi Glass Company, Limited
    Inventors: Seiki OHARA, Kazutaka ONO, Tetsuya NAKASHIMA
  • Publication number: 20140217336
    Abstract: To provide a laser oscillation device capable of generating laser oscillation by efficiently absorbing sunlight. A solar-pumped laser oscillation device wherein the gain medium is Nd-containing B2O3—Bi2O3 glass. The solar-pumped laser oscillation device wherein the gain medium contains Yb. The solar-pumped laser oscillation device wherein the matrix glass of the Nd-containing B2O3—Bi2O3 glass comprises from 20 to 65 mol % of B2O3 and from 10 to 48 mol % of Bi2O3.
    Type: Application
    Filed: April 7, 2014
    Publication date: August 7, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Seiki OHARA, Yuya Shimada
  • 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
  • Patent number: 8443629
    Abstract: The present invention relates to a method for manufacturing an ultra-thin glass substrate, the method including: a feeding step of feeding a preform for a glass substrate to a production line while being held; a heating step of heating the preform fed from the feeding step to a temperature around a softening point thereof; and a drawing step of drawing the preform that has softened in the heating step to form an ultra-thin glass substrate, in which the preform has been wound on a cylindrical first winding roll.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: May 21, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Yutaka Kuroiwa, Seiki Ohara
  • Publication number: 20120264585
    Abstract: To provide a method for producing chemically tempered glass, whereby the chemical tempering can be done at a low temperature and in a short time. A method for producing chemically tempered glass, which comprises chemically tempering glass for chemical tempering, comprising, as represented by mole percentage based on the following oxides, from 60 to 75% of SiO2, from 5 to 15% of Al2O3, from 1 to 12% of MgO, from 0 to 3% of CaO, from 0 to 3% of ZrO2, from 10 to 20% of Li2O, from 0 to 8% of Na2O and from 0 to 5% of K2O, and having a total content R2O of Li2O, Na2O and K2O of at most 25%, and a ratio Li2O/R2O of the Li2O content to R2O of from 0.5 to 1.0.
    Type: Application
    Filed: March 13, 2012
    Publication date: October 18, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Seiki OHARA, Kazutaka Ono, Tetsuya Nakashima
  • Publication number: 20120247152
    Abstract: The present invention relates to a process for producing a chemically strengthened glass, which includes conducting a sampling inspection including a measurement of a refractive index distribution of a glass. According to the process of the invention, the surface compressive stress and the depth of the compressive stress layer of the chemically strengthened glass can be stably and accurately measured.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 4, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Seiki Ohara, Kazutaka Ono, Masayuki Ishimaru, Takuo Osuka
  • Publication number: 20120241697
    Abstract: To provide a near infrared cut filter glass which can be used without defects, etc., since crystals hardly form in the glass, even in a case where heat treatment is conducted in a coating process carried out after glass forming or in a step of producing an imaging device using such glass. A near infrared cut filter glass, which comprises, as represented by cation percentage, 25 to 37% of P5+, 16.2 to 25% of Al3+, 0.5 to 40% of R+ (wherein R+ is a total content of Li+, Na+ and K+), 0.5 to 45% of R2+ (wherein R2+ is a total content of Mg2+, Ca2+, Sr2+, Ba2+ and Zn2+), 2 to 10% of Cu2+, and 0 to 1% of Sb3+, and comprising, as represented by anion percentage, 30 to 85% of O2?, and 15 to 70% of F?.
    Type: Application
    Filed: June 6, 2012
    Publication date: September 27, 2012
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Hiroyuki OHKAWA, Yuki KONDO, Seiki OHARA, Yuuichi IIDA
  • Publication number: 20120131955
    Abstract: The present invention relates to a method for manufacturing an ultra-thin glass substrate, the method including: a feeding step of feeding a preform for a glass substrate to a production line while being held; a heating step of heating the preform fed from the feeding step to a temperature around a softening point thereof; and a drawing step of drawing the preform that has softened in the heating step to form an ultra-thin glass substrate, in which the preform has been wound on a cylindrical first winding roll.
    Type: Application
    Filed: February 6, 2012
    Publication date: May 31, 2012
    Inventors: Yutaka Kuroiwa, Seiki Ohara
  • 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
  • Patent number: 8053383
    Abstract: To provide a light-amplifying glass capable of increasing absorption of Yb3+. A light-amplifying glass to be used for amplifying light having a wavelength of 1.0 to 1.2 ?m, which comprises, as represented by mol % based on the following oxides, from 30 to 55% of Bi2O3, from 25 to 50% of either one, or both in total, of SiO2 and B2O3, from 12 to 27% of either one, or both in total, of Al2O3 and Ga2O3, from 0 to 4% of La2O3 and from 0.1 to 4% of Yb2O3 and which contains substantially no Er2O3. An optical waveguide having such a light-amplifying glass as a core.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: November 8, 2011
    Assignee: Asahi Glass Company, Limited
    Inventors: Seiki Ohara, Yuki Kondo
  • Publication number: 20110172076
    Abstract: To provide a light-amplifying glass capable of increasing absorption of Yb3+. A light-amplifying glass to be used for amplifying light having a wavelength of 1.0 to 1.2 ?m, which comprises, as represented by mol % based on the following oxides, from 30 to 55% of Bi2O3, from 25 to 50% of either one, or both in total, of SiO2 and B2O3, from 12 to 27% of either one, or both in total, of Al2O3 and Ga2O3, from 0 to 4% of La2O3 and from 0.1 to 4% of Yb2O3 and which contains substantially no Er2O3. An optical waveguide having such a light-amplifying glass as a core.
    Type: Application
    Filed: March 25, 2011
    Publication date: July 14, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Seiki OHARA, Yuki Kondo
  • 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
  • Publication number: 20060100084
    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: Application
    Filed: December 20, 2005
    Publication date: May 11, 2006
    Applicant: Asahi Glass Company, Limited
    Inventors: Tatsuo Nagashima, Naoki Sugimoto, Seiki Ohara, Tomoharu Hasegawa
  • Patent number: 6819860
    Abstract: An optical amplifying glass comprising 100 parts by mass of a matrix glass and from 0.1 to 10 parts by mass of Er doped to the matrix glass, wherein the matrix glass comprises Bi2O3, at least one of B2O3 and SiO2, at least one member selected from the group consisting of Ga2O3, WO3 and TeO2, and La2O3 in such a ratio that Bi2O3 is from 20 to 80 mol %, B2O3+SiO2 is from 5 to 75 mol %, Ga2O3+WO3+TeO2 is from 0.1 to 35 mol %, and La2O3 is from 0.01 to 15 mol %.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: November 16, 2004
    Assignee: Asahi Glass Company, Limited
    Inventors: Seiki Ohara, Hideaki Hayashi, Naoki Sugimoto, Katsuhiro Ochiai, Yasuji Fukasawa, Takeshi Hirose, Manuel Reyes
  • Publication number: 20030118316
    Abstract: An optical amplifying glass comprising 100 parts by mass of a matrix glass and from 0.1 to 10 parts by mass of Er doped to the matrix glass, wherein the matrix glass comprises Bi2O3, at least one of B2O3 and SiO2, at least one member selected from the group consisting of Ga2O3, WO3 and TeO2, and La2O3 in such a ratio that Bi2O3 is from 20 to 80 mol %, B2O3+SiO2 is from 5 to 75 mol %, Ga2O3+WO3+TeO2 is from 0.1 to 35 mol %, and La2O3 is from 0.01 to 15 mol %.
    Type: Application
    Filed: October 7, 2002
    Publication date: June 26, 2003
    Applicant: Asahi Glass Company, Limited
    Inventors: Seiki Ohara, Hideaki Hayashi, Naoki Sugimoto, Katsuhiro Ochiai, Yasuji Fukasawa, Takeshi Hirose, Manuel Reyes
  • Patent number: 6297182
    Abstract: A glass for a substrate consisting essentially of: SiO2 45 to 65 wt %, Al2O3 6 to 20 wt %, B2O3 0.5 to 6 wt %, MgO 2 to 5 wt %, CaO 1 to 10 wt %, SrO 0 to 6.5 wt %, BaO 0 to 2 wt %, MgO + CaO + SrO + BaO 10 to 17 wt %, ZrO2 0 to 7 wt %, and Na2O + K2O 7 to 15 wt %.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: October 2, 2001
    Assignee: Asahi Glass Company Ltd.
    Inventors: Kei Maeda, Seiki Ohara, Tetsuya Nakashima, Yasumasa Nakao
  • Patent number: 6268304
    Abstract: A plate glass containing B2O3, having a total content of Li2O, Na2O and K2O of from 0 to 13 mol %, a content of BaO of from 0 to 0.8 mol % and a content of SiO2 of from 50 to 75 mol %, and having an average linear thermal expansion coefficient of from 75×10−7 to 120×10−7/° C. in a range of from 50 to 350° C., a strain point of at least 550° C., a density of at most 2.65 g/cm3 at 20° C. and an oxygen atom density of from 7.2×10−2 to 9.0×10−2 mol/cm3 at 20° C.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: July 31, 2001
    Assignee: Asahi Glass Company Ltd.
    Inventors: Kei Maeda, Seiki Ohara, Yasumasa Nakao