Patents by Inventor Shusaku Akiba

Shusaku Akiba 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: 11028013
    Abstract: A chemically strengthened glass has a compressive stress layer formed in a glass surface layer by ion exchange. The compressive stress layer includes at least two types of stress patterns of a stress pattern A close to a glass surface and a stress pattern B on an inner side of the glass. In the stress pattern A, compressive stress increases as going inward from the glass surface. In the stress pattern B, compressive stress decreases as going inward from the glass surface. Depth of compressive stress layer in the stress pattern B is 90 ?m or more from the glass surface. Compressive stress ? MPa of the glass surface in the stress pattern A and compressive stress ? MPa at a point where the stress pattern A and the stress pattern B cross each other satisfy a relation of ?>?.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: June 8, 2021
    Assignee: AGC Inc.
    Inventors: Masao Ozeki, Shusaku Akiba, Izuru Kashima
  • Publication number: 20210053867
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Application
    Filed: September 17, 2020
    Publication date: February 25, 2021
    Applicant: AGC Inc.
    Inventors: Suguru MURAYAMA, Seiki OHARA, Qing LI, Shusaku AKIBA
  • Publication number: 20200132521
    Abstract: A sensor module includes: a base member; at least one of a single or a plurality of sensors and vibrators arranged on the base member; and a protective member constituted of at least one flat surface or a curved surface, provided so as to cover the at least one of the sensors and the vibrators. A part or whole of the protective member is formed of a strengthened glass and the strengthened glass is a chemically strengthened glass or a physically strengthened glass.
    Type: Application
    Filed: December 26, 2019
    Publication date: April 30, 2020
    Applicant: AGC INC.
    Inventors: Shusaku Akiba, Masao Ozeki, Satoshi Takeda, Satoshi Kanasugi, Satoshi Ogami
  • Patent number: 10472272
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2O, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: November 12, 2019
    Assignee: AGC Inc.
    Inventors: Suguru Murayama, Seiki Ohara, Qing Li, Shusaku Akiba
  • Patent number: 10384974
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2O, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: August 20, 2019
    Assignee: AGC Inc.
    Inventors: Suguru Murayama, Seiki Ohara, Qing Li, Shusaku Akiba
  • Patent number: 10370287
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 72% of SiO2, 7 to 18% of Al2O3, 1% or more of B2O3, 0 to 4% of P2O5, 5 to 16% of Li2O, 0 to 7% of Na2O, 0 to 2% of K2O, 0 to 6% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: August 6, 2019
    Assignee: AGC Inc.
    Inventors: Suguru Murayama, Seiki Ohara, Qing Li, Shusaku Akiba
  • Patent number: 10370286
    Abstract: To provide glass to be used for chemically tempered glass, of which the strength is less likely to be reduced even when indentations are formed thereon. Glass for chemical tempering, which comprises, as represented by mole percentage based on oxides, from 62 to 68% of SiO2, from 6 to 12% of Al2O3, from 7 to 13% of MgO, from 9 to 17% of Na2O, and from 0 to 7% of K2O, wherein the difference obtained by subtracting the content of Al2O3 from the total content of Na2O and K2O is less than 10%, and when ZrO2 is contained, its content is at most 0.8%. Chemically tempered glass obtained by chemically tempering such glass for chemical tempering. Such chemically tempered glass has a compressive stress layer formed on the glass surface, which has a thickness of at least 30 ?m and a surface compressive stress of at least 550 MPa.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: August 6, 2019
    Assignee: AGC Inc.
    Inventors: Jun Endo, Shusaku Akiba, Kazutaka Ono, Tetsuya Nakashima
  • Publication number: 20190194057
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2O, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Application
    Filed: March 4, 2019
    Publication date: June 27, 2019
    Applicant: AGC Inc.
    Inventors: Suguru Murayama, Seiki Ohara, Qing Li, Shusaku Akiba
  • Patent number: 10189739
    Abstract: To provide chemically tempered glass which is less likely to break even if scratched. Chemically tempered glass, which comprises, as represented by mole percentage based on the following oxides, from 56 to 72% of SiO2, from 8 to 20% of Al2O3, from 9 to 25% of Na2O, from 0 to 2% of K2O, and from 0 to 15% of MgO, and which has a surface compressive stress of at least 900 MPa and an internal tensile stress of at most 30 MPa. Glass for chemical tempering, which comprises, as represented by mole percentage based on the following oxides, from 56 to 69% of SiO2, from 8 to 16% of Al2O3, from 9 to 22% of Na2O, from 0 to 1% of K2O, from 5.5 to 14% of MgO, from 0 to 2% of ZrO2, and from 0 to 6% of B2O3.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: January 29, 2019
    Assignee: AGC Inc.
    Inventors: Shusaku Akiba, Shigeki Sawamura, Suguru Murayama, Hiroyuki Ohkawa, Yusuke Kobayashi, Kazutaka Ono, Tetsuya Nakashima
  • Publication number: 20180327304
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2O, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Application
    Filed: July 12, 2018
    Publication date: November 15, 2018
    Applicant: AGC Inc.
    Inventors: Suguru MURAYAMA, Seiki Ohara, Qing Li, Shusaku Akiba
  • Publication number: 20180319696
    Abstract: The present invention relates to a foldable glass sheet having a thickness t of equal to or smaller than 0.2 mm and having a surface compressive stress CS of greater than 700 MPa, in which when the glass sheet is subjected to a bending test in which, while bending and supporting the glass sheet by a first support board and a second support board which are parallel to each other, the second support board is moved relative to the first support board by equal to or greater than 200 mm in a state of maintaining an interval between a support surface of the first support board and a support surface of the second support board, the glass sheet is not broken even in a case where a curvature radius of a bent portion of the glass sheet is set to equal to or smaller than 10 mm.
    Type: Application
    Filed: April 30, 2018
    Publication date: November 8, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventor: Shusaku AKIBA
  • Publication number: 20180265397
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 72% of SiO2, 7 to 18% of Al2O3, 1% or more of B2O3, 0 to 4% of P2O5, 5 to 16% of Li2O, 0 to 7% of Na2O, 0 to 2% of K2O, 0 to 6% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Application
    Filed: March 13, 2018
    Publication date: September 20, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Suguru Murayama, Seiki Ohara, Qing Li, Shusaku Akiba
  • Publication number: 20180265398
    Abstract: A glass sheet includes, as represented by mole percentage based on oxides, from 55.5 to 80% of SiO2, from 12 to 20% of Al2O3, from 8 to 25% of Na2O, 2.5% or more of P2O5, and 1% or more of an alkaline earth metal RO (RO is MgO+CaO+SrO+BaO).
    Type: Application
    Filed: May 24, 2018
    Publication date: September 20, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shuji YAMAZAKI, Shusaku AKIBA, Seiki OHARA, Kazunari TOHYAMA
  • Publication number: 20180251395
    Abstract: Provided is an optical glass suitable for an imaging lens or the like used for a vehicle-mounted camera exposed to harsh environment, having a high refractive index and high strength. The optical glass has a strengthened layer at a surface layer, and a depth of the strengthened layer is 1 ?m or more from a surface of the optical glass, and a refractive index (nd) of the optical glass is 1.73 to 2.10.
    Type: Application
    Filed: May 2, 2018
    Publication date: September 6, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shusaku AKIBA, Tatsuo NAGASHIMA, Shigeki SAWAMURA
  • Publication number: 20180244559
    Abstract: Provided is an optical glass suitable for an imaging lens or the like used for a vehicle-mounted camera exposed to harsh environment, having a high refractive index and high strength, excellent crack resistance, and a sufficiently low glass transition point and devitrification temperature. In the optical glass, nd is 1.70 or more and 2.10 or less, Tg is 500° C. or more and 630° C. or less, the devitrification temperature is 1300° C. or less, a specific gravity is 4.0 g/cm3 or less, a crack initiation load (CIL) is 20 gf or more, and a fracture toughness value (Kc) is 0.60 MPa·m1/2 or more.
    Type: Application
    Filed: May 1, 2018
    Publication date: August 30, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shusaku AKIBA, Tatsuo NAGASHIMA, Shigeki SAWAMURA
  • Publication number: 20180230044
    Abstract: A chemically strengthened glass has a compressive stress layer formed in a glass surface layer by ion exchange. The compressive stress layer includes at least two types of stress patterns of a stress pattern A close to a glass surface and a stress pattern B on an inner side of the glass. In the stress pattern A, compressive stress increases as going inward from the glass surface. In the stress pattern B, compressive stress decreases as going inward from the glass surface. Depth of compressive stress layer in the stress pattern B is 90 ?m or more from the glass surface. Compressive stress ? MPa of the glass surface in the stress pattern A and compressive stress ? MPa at a point where the stress pattern A and the stress pattern B cross each other satisfy a relation of ?>?.
    Type: Application
    Filed: February 14, 2018
    Publication date: August 16, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Masao Ozeki, Shusaku Akiba, Izuru Kashima
  • Patent number: 10040716
    Abstract: A glass sheet includes, as represented by mole percentage based on oxides, from 55.5 to 80% of SiO2, from 12 to 20% of Al2O3, from 8 to 25% of Na2O, 2.5% or more of P2O5, and 1% or more of an alkaline earth metal RO (RO is MgO+CaO+SrO+BaO).
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: August 7, 2018
    Assignee: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shuji Yamazaki, Shusaku Akiba, Seiki Ohara, Kazunari Tohyama
  • Publication number: 20180215651
    Abstract: Provided is a chemically strengthened glass having a sheet thickness of less than 300 ?m, having a surface compressive stress of 200 MPa or more and satisfying CT?4×(t/1000+0.02)?2+90, in which an internal tensile stress is CT (MPa) and the sheet thickness is t (?m).
    Type: Application
    Filed: February 12, 2018
    Publication date: August 2, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shusaku AKIBA, Akio KOIKE
  • Publication number: 20180194671
    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: March 1, 2018
    Publication date: July 12, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shin-ichi AMMA, Tatsuo NAGASHIMA, Shusaku AKIBA
  • Publication number: 20180186685
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2O, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 5, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Suguru MURAYAMA, Seiki OHARA, Qing LI, Shusaku AKIBA