Patents by Inventor Jun Sasai

Jun Sasai 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: 9714193
    Abstract: The present invention relates to a float glass for chemical strengthening, containing a bottom surface coming into contact with a molten metal at the time of forming and a top surface opposing the bottom surface, in which a difference ?(N—Na2O2) determined by subtracting a square of a normalized Na2O surface concentration of the bottom surface which is a value obtained by dividing an Na2O concentration in the bottom surface by an Na2O concentration at a depth position of 100 ?m therefrom, from a square of a normalized Na2O surface concentration of the top surface which is a value obtained by dividing an Na2O concentration in the top surface by an Na2O concentration at a depth position of 100 ?m therefrom, is 0.040 or less.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: July 25, 2017
    Assignee: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yuichi Suzuki, Tetsuya Nakashima, Jun Sasai
  • Publication number: 20160083288
    Abstract: A glass for chemical strengthening is a glass plate. The glass plate includes, as represented by mass percentage based on the following oxides, 65 to 72% of SiO2, 3.4 to 8.6% of Al2O3, 3.3 to 6% of MgO, 6.5 to 9% of CaO, 13 to 16% of Na2O, 0 to 1% of K2O, 0 to 0.2% of TiO2, 0.01 to 0.15% of Fe2O3 and 0.02 to 0.4% of SO3. In the glass plate, (Na2O+K2O)/Al2O3 is 1.8 to 5.
    Type: Application
    Filed: December 4, 2015
    Publication date: March 24, 2016
    Applicant: Asahi Glass Company, Limited
    Inventors: Junichiro KASE, Shuichi AKADA, Jun SASAI, Shusaku AKIBA
  • Publication number: 20160023945
    Abstract: The present invention relates to a float glass for chemical strengthening, containing a bottom surface coming into contact with a molten metal at the time of forming and a top surface opposing the bottom surface, in which a difference ?(N—Na2O2) determined by subtracting a square of a normalized Na2O surface concentration of the bottom surface which is a value obtained by dividing an Na2O concentration in the bottom surface by an Na2O concentration at a depth position of 100 ?M therefrom, from a square of a normalized Na2O surface concentration of the top surface which is a value obtained by dividing an Na2O concentration in the top surface by an Na2O concentration at a depth position of 100 ?m therefrom, is 0.040 or less.
    Type: Application
    Filed: June 29, 2015
    Publication date: January 28, 2016
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yuichi SUZUKI, Tetsuya NAKASHIMA, Jun SASAI
  • Publication number: 20150064411
    Abstract: A front glass plate for a stacked structure includes greater than or equal to 5 mol % of Al2O3, in terms of an oxide, as a component, 50% crack initiation load of the front glass plate being greater than or equal to 0.5 kg.
    Type: Application
    Filed: November 11, 2014
    Publication date: March 5, 2015
    Applicant: Asahi Glass Company, Limited
    Inventors: Jun SASAI, Kazutaka Ono, Tetsuya Nakashima, Keisuke Abe, Yasuyuki Kameyama, Nana Sato, Yasumasa Kato, Masao Fukami, Kazuhiko Mitarai
  • Publication number: 20140305502
    Abstract: A method for producing a glass substrate includes (a) a step of forming molten glass having a temperature T2 less than or equal to 1500° C. on molten tin having an iron concentration greater than or equal to 100 ppm to produce a glass ribbon having a temperature T4 less than or equal to 1100° C. and a logarithm log ? greater than or equal to 8.8, and (b) a step of cooling the glass ribbon to room temperature to produce the glass substrate. The temperature T2 represents a temperature when a logarithm of a viscosity ? (dPa·s) is 2, the temperature T4 represents a temperature when the logarithm of the viscosity ? (dPa·s) is 4, and the logarithm log ? represents a logarithm of a volume resistivity ? (?·cm) at 150° C.
    Type: Application
    Filed: June 27, 2014
    Publication date: October 16, 2014
    Applicant: Asahi Glass Company, Limited
    Inventors: Jun SASAI, Yuki KONDO, Yo NAKAHARA, Kuniaki HIROMATSU, Hideaki HAYASHI
  • Publication number: 20140162863
    Abstract: Glasses are described which have characteristics that produce high visible transmittance, low solar transmittance, and high selectivity. The glasses can also preferably have a blue-green color. A number of advantageous formulations are described.
    Type: Application
    Filed: December 6, 2012
    Publication date: June 12, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Darryl J. Costin, Harold Haller, Clarence Martin, Yuki Kondo, Yuya Shimada, Jun Sasai
  • Patent number: 8361916
    Abstract: An object of the invention is to provide an optical glass for precision press having optical properties of a high refractive index and a low dispersion property and having a low molding temperature, a high devitrification resistance, an excellent molding property, and a small specific gravity. The optical glass of the invention contains, in terms of % by mass on the basis of oxides, respective components of B2O3: 10 to 20%, SiO2: 0.5 to 12%, La2O3: 25 to 50%, Gd2O3: 0 to 20%, Y2O3: 0 to 20%, provided that La2O3+Gd2O3+Y2O3: 35 to 60%, ZnO: 5 to 20%, Li2O: 0.2 to 3%, ZrO2: 0 to 0.5%, Ta2O5: 3 to 18% and WO3: 3 to 20%, and has optical constants of a refractive index nd of 1.84 to 1.86 and an Abbe number vd of 37 to 42 and a glass transition point (Tg) of 630° C. or lower.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: January 29, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Satoru Tomeno, Jun Sasai, Hiroyuki Ohkawa, Kenji Imakita, Yuki Kondo
  • Publication number: 20100240516
    Abstract: An object of the invention is to provide an optical glass for precision press having optical properties of a high refractive index and a low dispersion property and having a low molding temperature, a high devitrification resistance, an excellent molding property, and a small specific gravity. The optical glass of the invention contains, in terms of % by mass on the basis of oxides, respective components of B2O3: 10 to 20%, SiO2: 0.5 to 12%, La2O3: 25 to 50%, Gd2O3: 0 to 20%, Y2O3: 0 to 20%, provided that La2O3+Gd2O3+Y2O3: 35 to 60%, ZnO: 5 to 20%, Li2O: 0.2 to 3%, ZrO2: 0 to 0.5%, Ta2O5: 3 to 18% and WO3: 3 to 20%, and has optical constants of a refractive index nd of 1.84 to 1.86 and an Abbe number vd of 37 to 42 and a glass transition point (Tg) of 630° C. or lower.
    Type: Application
    Filed: June 2, 2010
    Publication date: September 23, 2010
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Satoru Tomeno, Jun Sasai, Hiroyuki Ohkawa, Kenji Imakita, Yuki Kondo
  • Patent number: 7666332
    Abstract: To provide a production process capable of making the transmittance of an optical glass element obtainable by press-molding a TeO2-containing glass high. A process for producing an optical glass element, which comprises press-molding a TeO2-containing glass, wherein the press-molding is carried out in an atmosphere in which the nitrogen partial pressure is at most 102 Pa. The above process for producing an optical glass element, wherein the face of a mold for the press-molding to be in contact with the glass is made of carbon. The above process for producing an optical glass element, wherein the molded glass obtained by the press-molding is held in an oxygen-containing atmosphere at a temperature within a range of at least a temperature lower by 50° C. than the glass transition point of the TeO2-containing glass and at most the softening point of the glass.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: February 23, 2010
    Assignee: Asahi Glass Company, Limited
    Inventors: Jun Sasai, Syuji Matsumoto, Takeshi Shimazaki, Naoki Sugimoto
  • Patent number: 7638449
    Abstract: This invention provides an optical glass including, by mass %: 30 to 40% of B2O3; 2.5 to 6% of Li2O; 10 to 17% of ZnO; 12 to 22% of La2O3; 15 to 25% of Gd2O3; 0 to 5% of SiO2; 0 to 5% of Bi2O3; 0 to 15% of Al2O3; 0 to 3% of ZrO2; 0 to 5% of WO3; 0 to 5% of Ta2O5; 0 to 3% of TiO2; 0 to 5% of Y2O3; and 0 to 5% of MgO+CaO+SrO+BaO.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: December 29, 2009
    Assignee: Asahi Glass Company, Limited
    Inventors: Kenji Imakita, Jun Sasai, Naoki Sugimoto
  • Publication number: 20090233782
    Abstract: The present invention has an object to provide an optical glass having excellent devitrification properties during high temperature forming and press moldability and capable of reducing weight and size of an optical system. The present invention relates to an optical glass comprising, in mass % on oxide basis; B2O3: 10 to 25%, SiO2: 0.5 to 12%, La2O3: 17 to 38%, Gd2O3: 5 to 25%, ZnO: 8 to 20%, Li2O: 0.5 to 3%, Ta2O5: 5 to 15% and WO3: 3 to 15, wherein (SiO2+B2O3)/(ZnO+Li2O) value which is a mass ratio of the total content of SiO2 and B2O3 to the total content of ZnO and Li2O is from 1.35 to 1.90.
    Type: Application
    Filed: March 13, 2009
    Publication date: September 17, 2009
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventor: Jun SASAI
  • Patent number: 7582580
    Abstract: The present invention provides an optical glass including, by mass %: 46 to 70 of B2O3; 3 to 10 of Li2O; 5 to 15 of Y2O3; 0 to 46 of SiO2: 0 to 20 of Al2O3: 0 to 40 of MgO+CaO+SrO+BaO; 0 to 30 of La2O3; and 0 to 10 of ZrO2+TiO2+Gd2O3.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: September 1, 2009
    Assignee: Asahi Glass Company, Limited
    Inventors: Hiroyuki Ohkawa, Jun Sasai, Naoki Sugimoto
  • Patent number: 7563736
    Abstract: An optical glass which has an internal transmittance to a light having a wavelength of 400 nm being at least 90% as calculated in a thickness of 1 mm and which contains at least 25 mol % of B2O3 and from 0.1 to 20 mol % of TeO2. The above optical glass which contains La2O3. The above optical glass wherein the glass transition point ?650° C. and the refractive index at 633 nm?1.70. A process for producing an optical element made of the above optical glass, which comprises dropping the optical glass in a molten state from a flow outlet of a flow out pipe made of a platinum alloy to form a preform and subjecting it to precision press-molding.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: July 21, 2009
    Assignee: Asahi Glass Company, Limited
    Inventors: Tomoyuki Kobayashi, Jun Sasai, Syuji Matsumoto, Naoki Sugimoto
  • Publication number: 20090093357
    Abstract: The invention provides: an optical glass which comprises, in terms of % by mass on the basis of oxides, 13-27% of B2O3, 20-35% of La2O3, 5-25% of Gd2O3, 5-20% of ZnO, 0.5-3% of Li2O, 0.5-15% of Ta2O5 and 0.5-10% of WO3, wherein the value of (SiO2+B2O3)/(ZnO+Li2O), which is the mass ratio of the total content of SiO2 and B2O3 to the total content of ZnO and Li2O, is 1.35-1.65; and a lens comprising the optical glass.
    Type: Application
    Filed: December 11, 2008
    Publication date: April 9, 2009
    Applicant: Asahi Glass Company, Limited
    Inventors: Jun SASAI, Naoki Sugimoto
  • Patent number: 7514381
    Abstract: To provide an optical glass which has a high transmittance and a high refractive index and shows little decrease in the transmitted light intensity when continuously irradiated with a blue-violet laser diode light, and which is less prone to a higher melting temperature and exhibits chemical durability being not low. An optical glass consisting essentially of, as represented by mol %, from 35 to 54% of TeO2, from 0 to 10% of GeO2, from 5 to 30% of B2O3, from 0 to 15% of Ga2O3, from 0 to 8% of Bi2O3, from 3 to 20% of ZnO, from 0 to 10% of MgO+CaO+SrO+BaO, from 1 to 10% of Y2O3+La2O3+Gd2O3, from 0 to 5% of Ta2O5+Nb2O5, from 0 to 1.8% of TiO2, and from 0 to 6% of Li2O+Na2O+K2O+Rb2O+Cs2O. A lens made of such an optical glass.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: April 7, 2009
    Assignee: Asahi Glass Company, Limited
    Inventors: Syuji Matsumoto, Jun Sasai, Naoki Sugimoto
  • Publication number: 20080318758
    Abstract: This invention provides an optical glass including, by mass %: 30 to 40% of B2O3; 2.5 to 6% of Li2O; 10 to 17% of ZnO; 12 to 22% of La2O3; 15 to 25% of Gd2O3; 0 to 5% of SiO2; 0 to 5% of Bi2O3; 0 to 15% of Al2O3; 0 to 3% of ZrO2; 0 to 5% of WO3; 0 to 5% of Ta2O5; 0 to 3% of TiO2; 0 to 5% of Y2O3; and 0 to 5% of MgO+CaO+SrO+BaO.
    Type: Application
    Filed: August 15, 2008
    Publication date: December 25, 2008
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Kenji IMAKITA, Jun Sasai, Naoki Sugimoto
  • Publication number: 20080312062
    Abstract: The invention provides an optical glass comprising, by mass % on the oxide basis; 25 to 50% of B2O3; 5 to 25% of ZnO: 13 to 25% of La2O3; 10 to 28% of Gd2O3; and 1.5 to 4% of Li2O, the optical glass having: a refractive index (nd) of 1.65 to 1.76; an Abbe number (?d) of 45 to 60; and a molding temperature (Tp), as defined with the glass transition temperature (Tg) and the yield point (At) by the expression At+(At?Tg)/2, of 650° C. or less; the optical glass substantially containing neither an arsenic nor a lead nor a fluorine.
    Type: Application
    Filed: August 21, 2008
    Publication date: December 18, 2008
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Jun SASAI, Naoki Sugimoto
  • Publication number: 20080312063
    Abstract: The present invention provides an optical glass including, by mass %: 46 to 70 of B2O3; 3 to 10 of Li2O; 5 to 15 of Y2O3; 0 to 46 of SiO2: 0 to 20 of Al2O3: 0 to 40 of MgO+CaO+SrO+BaO; 0 to 30 of La2O3; and 0 to 10 of ZrO2+TiO2+Gd2O3.
    Type: Application
    Filed: August 21, 2008
    Publication date: December 18, 2008
    Applicant: ASAHI GLASS CO., LTD.
    Inventors: Hiroyuki OHKAWA, Jun Sasai, Naoki Sugimoto
  • Publication number: 20080099937
    Abstract: To provide a production process capable of making the transmittance of an optical glass element obtainable by press-molding a TeO2-containing glass high. A process for producing an optical glass element, which comprises press-molding a TeO2-containing glass, wherein the press-molding is carried out in an atmosphere in which the nitrogen partial pressure is at most 102 Pa. The above process for producing an optical glass element, wherein the face of a mold for the press-molding to be in contact with the glass is made of carbon. The above process for producing an optical glass element, wherein the molded glass obtained by the press-molding is held in an oxygen-containing atmosphere at a temperature within a range of at least a temperature lower by 50° C. than the glass transition point of the TeO2-containing glass and at most the softening point of the glass.
    Type: Application
    Filed: November 30, 2007
    Publication date: May 1, 2008
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Jun Sasai, Syuji Matsumoto, Takeshi Shimazaki, Naoki Sugimoto
  • Publication number: 20070105702
    Abstract: To provide an optical glass which has a high transmittance and a high refractive index and shows little decrease in the transmitted light intensity when continuously irradiated with a blue-violet laser diode light, and which is less prone to a higher melting temperature and exhibits chemical durability being not low. An optical glass consisting essentially of, as represented by mol %, from 35 to 54% of TeO2, from 0 to 10% of GeO2, from 5 to 30% of B2O3, from 0 to 15% of Ga2O3, from 0 to 8% of Bi2O3, from 3 to 20% of ZnO, from 0 to 10% of MgO+CaO+SrO+BaO, from 1 to 10% of Y2O3+La2O3+Gd2O3, from 0 to 5% of Ta2O5+Nb2O5, from 0 to 1.8% of TiO2, and from 0 to 6% of Li2O+Na2O+K2O+Rb2O+Cs2O. A lens made of such an optical glass.
    Type: Application
    Filed: December 26, 2006
    Publication date: May 10, 2007
    Applicant: Asahi Fiber Glass Company, Limited
    Inventors: Syuji Matsumoto, Jun Sasai, Naoki Sugimoto