Patents by Inventor Kensuke Nagai

Kensuke Nagai 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: 10865134
    Abstract: A wavelength-selective transmissive glass has a light transmittance Tmore than 315 nm and 400 nm or less at a wavelength of more than 315 nm and 400 nm or less represented by the formula shown below of 1% or more in terms of a plate thickness of 6 mm and a light transmittance T315 nm or less at a wavelength of 315 nm or less represented by the formula shown below of 60% or less in terms of a plate thickness of 6 mm. Ak is a weighting factor at a wavelength k (nm) for calculating T (light transmittance) defined in ISO-9050:2003, and Tk is a transmittance at the wavelength k (nm) in terms of a plate thickness of 6 mm: Tmore than 315 nm and 400 nm or less=(?k=more than 315400Ak×Tk)/(?k=more than 315400Ak) T315 nm or less=(?k=300315Ak×Tk)/(?k=300315Ak).
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: December 15, 2020
    Assignees: AGC Inc., TSUBOTA LABORATORY, INC.
    Inventors: Kensuke Nagai, Tetsuya Nakashima, Yutaka Kuroiwa, Hiroyuki Hijiya, Masamichi Tanida, Akio Koike, Manabu Nishizawa, Kazuo Tsubota, Toshihide Kurihara, Hidemasa Torii
  • Patent number: 10773991
    Abstract: In a soda lime glass, a content of total iron calculated as Fe2O3, expressed in mass % on an oxide basis, is 0.25 to 1%, a mass proportion of divalent iron calculated as Fe2O3 in the total iron calculated as Fe2O3 is 30 to 50%, a content of total sulfur calculated as SO3, expressed in mass % on an oxide basis, is 0.003 to 0.1%, and a content of Se is 3 mass ppm or more. In the soda lime glass, visible light transmittance Tv_D65 is 30 to 55% calculated as 6 mm thickness of a glass sheet, solar direct transmittance Te is 20 to 40% calculate as 6 mm thickness of a glass sheet, and excitation purity Pe is 8.0% or less calculated as 6 mm thickness of a glass sheet.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: September 15, 2020
    Assignee: AGC Inc.
    Inventors: Hiroyuki Hijiya, Kensuke Nagai, Eriko Maeda
  • Patent number: 10766806
    Abstract: The present invention pertains to a glass for a data storage medium substrate which contains a specific amount of each of SiO2, Al2O3, MgO, CaO, SrO, BaO, Li2O, Na2O, and K2O, in molar percentage based on the oxides, and does not substantially contain B2O3 or ZrO2, wherein the sum of the Li2O, Na2O, and K2O contents (R2O), the molar ratio of the SiO2 content to the Al2O3 content (SiO2/Al2O3), and the molar ratio of the sum of the SiO2 and Al2O3 contents (SiO2+Al2O3) to R2O[(SiO2+Al2O3)/R2O] fall within their specific ranges, formula (1): 90<[SiO2]+2×[Al2O3]+0.8×[RO]?0.5×[R2O] [in formula (1), RO represents the sum of the MgO, CaO, SrO, and BaO contents] is satisfied, and the glass transition point Tg, the alkali resistance, and the acid resistance fall within their specific ranges.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: September 8, 2020
    Assignee: AGC Inc.
    Inventors: Eriko Maeda, Hiroyuki Hijiya, Kensuke Nagai, Tetsuya Nakashima, Yutaka Kuroiwa
  • Patent number: 10611671
    Abstract: The present invention aims to provide a heat-ray- and ultraviolet-absorbing glass plate having low solar transmittance and ultraviolet transmittance, having a high visible light transmittance, and containing a small amount of bubbles. The present invention relates to a heat-ray- and ultraviolet-absorbing glass plate that is a soda lime glass having a specific composition, having a mass proportion of divalent iron to the total iron being 50% or more, and having, as a value calculated as 4 mm thickness of the glass plate, a visible light transmittance Tv of 66% or more, a solar transmittance Te of 65% or less, a ratio Tv/Te of Tv and Te of 1.3 or more, and an ultraviolet transmittance Tuv of 50% or less.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: April 7, 2020
    Assignee: AGC Inc.
    Inventors: Hiroyuki Hijiya, Kensuke Nagai, Eriko Maeda
  • Publication number: 20200031708
    Abstract: To provide a glass plate for a window material and a window comprising the glass plate, which are less likely to be a barrier to radio transmitting/receiving in use of a radio-utilizing apparatus, and a radio communication apparatus comprising the glass plate. A glass plate having a radio transmittance of at least 20% at a frequency of 100 GHz as calculated as 18 mm thickness, a window comprising the glass plate, and a radio communication apparatus comprising the glass plate.
    Type: Application
    Filed: October 2, 2019
    Publication date: January 30, 2020
    Applicant: AGC Inc.
    Inventors: Eriko MAEDA, Takato KAJIHARA, Kensuke NAGAI, Yutaka KUROIWA, Osamu KAGAYA, Ryuta SONODA, Hiroyuki HIJIYA
  • Publication number: 20190292637
    Abstract: An oil well pipe for expandable tubular, containing, in terms of % by mass: 0.020 to 0.080% of C, 0.50% or less of Si, 0.30 to 1.60% of Mn, 0.030% or less of P, 0.010% or less of S, 0.005 to 0.050% of Ti, and 0.010 to 0.500% of Al, and the balance being Fe and impurities, wherein, in a metallographic microstructure, an area fraction of a first phase composed of ferrite is from 90.0% to 98.0% and an area fraction of a second phase composed of one or more selected from the group consisting of tempered martensite, tempered bainite, and pearlite is from 2.0% to 10.0%.
    Type: Application
    Filed: August 30, 2016
    Publication date: September 26, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kensuke NAGAI, Manabu WADA, Noboru HASEGAWA, Hirohito IMAMURA, Masakazu OZAKI
  • Publication number: 20190241461
    Abstract: A soda lime glass plate has, on the basis of oxides, a total sulfur content in terms of SO3 of 0.001 to 0.2% in mass %, a total iron content in terms of Fe2O3 of 0.15 to 0.4% in mass %, and a total tin content in terms of SnO2 of 0.02 to 1% in mass %, and has a mass proportion of a divalent iron in terms of Fe2O3 in the total iron in terms of Fe2O3 of 45 to 70%. The soda lime glass plate has, as a conversion value for a 3.85 mm-thickness glass plate, a visible light transmittance Tv_A of 70% or more, a total solar transmittance Tts of 63.7% or less, and c* in the L*a*b* color space of 4 or less.
    Type: Application
    Filed: April 18, 2019
    Publication date: August 8, 2019
    Applicant: AGC Inc.
    Inventors: Hiroyuki HIJIYA, Kensuke NAGAI
  • Patent number: 10246361
    Abstract: There is provided a process for producing molten glass, which is capable of easily increasing the H2O content in glass melt with excessive generation of convection of the glass melt being reduced.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: April 2, 2019
    Assignee: AGC Inc.
    Inventors: Shingo Urata, Takashi Enomoto, Kazuhiro Suzuki, Kensuke Nagai
  • Publication number: 20180297888
    Abstract: A wavelength-selective transmissive glass has a light transmittance Tmore than 315 nm and 400 nm or less at a wavelength of more than 315 nm and 400 nm or less represented by the formula shown below of 1% or more in terms of a plate thickness of 6 mm and a light transmittance T315 nm or less at a wavelength of 315 nm or less represented by the formula shown below of 60% or less in terms of a plate thickness of 6 mm. Ak is a weighting factor at a wavelength k (nm) for calculating T (light transmittance) defined in ISO-9050:2003, and Tk is a transmittance at the wavelength k (nm) in terms of a plate thickness of 6 mm: Tmore than 315 nm and 400 nm or less=(?k=more than 315400 Ak×Tk)/(?k=more than 315400 Ak) T315 nm or less=(?k=300315 Ak×Tk)/(?k=300315 Ak).
    Type: Application
    Filed: June 1, 2018
    Publication date: October 18, 2018
    Applicants: ASAHI GLASS COMPANY, LIMITED, TSUBOTA LABORATORY, INC.
    Inventors: Kensuke NAGAI, Tetsuya NAKASHIMA, Yutaka KUROIWA, Hiroyuki HIJIYA, Masamichi TANIDA, AKIO KOIKE, Manabu NISHIZAWA, Kazuo TSUBOTA, Toshihide KURIHARA, Hidemasa TORII
  • Publication number: 20180273424
    Abstract: A wavelength-selective transmissive glass article has light transmittance Tmore than 315 nm and 400 nm or less at a wavelength of more than 315 nm and 400 nm or less of 1% or more. In addition, the wavelength-selective transmissive glass article has light transmittance T315 nm or less at a wavelength of 315 nm or less of 60% or less.
    Type: Application
    Filed: May 30, 2018
    Publication date: September 27, 2018
    Applicants: ASAHI GLASS COMPANY, LIMITED, TSUBOTA LABORATORY, INC.
    Inventors: Hideyuki Hirakoso, Takahiro Mashimo, Kensuke Nagai, Kazuo Tsubota, Toshihide Kurihara, Hidemasa Torii
  • Publication number: 20180237334
    Abstract: In a soda lime glass, a content of total iron calculated as Fe2O3, expressed in mass % on an oxide basis, is 0.25 to 1%, a mass proportion of divalent iron calculated as Fe2O3 in the total iron calculated as Fe2O3 is 30 to 50%, a content of total sulfur calculated as SO3, expressed in mass % on an oxide basis, is 0.003 to 0.1%, and a content of Se is 3 mass ppm or more. In the soda lime glass, visible light transmittance Tv—D65 is 30 to 55% calculated as 6 mm thickness of a glass sheet, solar direct transmittance Te is 20 to 40% calculate as 6 mm thickness of a glass sheet, and excitation purity Pe is 8.0% or less calculated as 6 mm thickness of a glass sheet.
    Type: Application
    Filed: April 20, 2018
    Publication date: August 23, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Hiroyuki Hijiya, Kensuke Nagai, Eriko Maeda
  • Publication number: 20180222789
    Abstract: The present invention pertains to a glass for a data storage medium substrate which contains a specific amount of each of SiO2, Al2O3, MgO, CaO, SrO, BaO, Li2O, Na2O, and K2O, in molar percentage based on the oxides, and does not substantially contain B2O3 or ZrO2, wherein the sum of the Li2O, Na2O, and K2O contents (R2O), the molar ratio of the SiO2 content to the Al2O3 content (SiO2/Al2O3), and the molar ratio of the sum of the SiO2 and Al2O3 contents (SiO2+Al2O3) to R2O [(SiO2+Al2O3)/R2O] fall within their specific ranges, formula (1): 90<[SiO2]+2×[Al2O3]+0.8×[RO]?0.5×[R2O] [in formula (1), RO represents the sum of the MgO, CaO, SrO, and BaO contents] is satisfied, and the glass transition point Tg, the alkali resistance, and the acid resistance fall within their specific ranges.
    Type: Application
    Filed: April 4, 2018
    Publication date: August 9, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Eriko MAEDA, Hiroyuki HIJIYA, Kensuke NAGAI, Tetsuya NAKASHIMA, Yutaka KUROIWA
  • Patent number: 10011521
    Abstract: To provide a colored glass plate of which the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 can be stably maintained at a high level while amber coloring derived from salt cake (Na2SO4) is suppressed by reducing the amount of salt cake used as a refining agent, and which has less bubbles regardless of a small amount of total sulfur as calculated as SO3. A colored glass plate which is made of alkali-containing silica glass containing iron, tin and sulfur, wherein, as represented by mass % based on oxides, the proportion of total sulfur as calculated as SO3 is less than 0.025%, the proportion of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 45%, the proportion of divalent tin as calculated as SnO2 to total tin as calculated as SnO2 is at least 0.1% as represented by mol %, and ?-OH is at least 0.15 mm?1.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: July 3, 2018
    Assignee: Asahi Glass Company, Limited
    Inventors: Kensuke Nagai, Yuya Shimada, Yusuke Arai
  • Publication number: 20180037491
    Abstract: The present invention aims to provide a heat-ray- and ultraviolet-absorbing glass plate having low solar transmittance and ultraviolet transmittance, having a high visible light transmittance, and containing a small amount of bubbles. The present invention relates to a heat-ray- and ultraviolet-absorbing glass plate that is a soda lime glass having a specific composition, having a mass proportion of divalent iron to the total iron being 50% or more, and having, as a value calculated as 4 mm thickness of the glass plate, a visible light transmittance Tv of 66% or more, a solar transmittance Te of 65% or less, a ratio Tv/Te of Tv and Te of 1.3 or more, and an ultraviolet transmittance Tuv of 50% or less.
    Type: Application
    Filed: October 17, 2017
    Publication date: February 8, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Hiroyuki HIJIYA, Kensuke Nagai, Eriko Maeda
  • Patent number: 9726305
    Abstract: An electric resistance welded steel pipe which has sufficient strength and low-temperature toughness and a low yield ratio and which is suitable as a line pipe to be laid in depths of the sea, characterized in that: the composition of the base material contains, in mass %, 0.05 to 0.10% of C, 1.00 to 1.60% of Mn, and 0.005 to less than 0.035% of Nb, and has a Ceq value of 0.23 to 0.38; and the metal microstructure of the base material contains 3 to 13% of martensite in area fraction with the balance being ferrite.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: August 8, 2017
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Yasuhiro Shinohara, Kensuke Nagai, Masakazu Ozaki
  • Patent number: 9637407
    Abstract: There are provided a conduit structure for molten glass, a vacuum degassing apparatus using the conduit structure, and a process for vacuum-degassing molten glass by use of the vacuum degassing apparatus, wherein without using a cooling system, solid thermal insulating materials constituting a backup for the conduit are prevented from being corroded by molten glass oozing out of a joint between adjacent fused cast refractories constituting the conduit, and wherein production cost is reduced.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: May 2, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Kensuke Nagai, Hiroaki Hamamoto, Shuji Kabashima
  • Publication number: 20170081232
    Abstract: There is provided a process for producing molten glass, which is capable of easily increasing the H2O content in glass melt with excessive generation of convention of the glass melt being reduced.
    Type: Application
    Filed: December 6, 2016
    Publication date: March 23, 2017
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shingo URATA, Takashi ENOMOTO, Kazuhiro Suzuki, Kensuke NAGAI
  • Patent number: 9592755
    Abstract: The time until a headrest contacts the head of an occupant in the event of a rear collision is shortened with a simple configuration. In a seat device, a stay (46) (including grommets (22)) is set with bending rigidity towards the vehicle front lower than the bending rigidity towards the vehicle rear. Accordingly, when the headrest oscillates in the event of a vehicle rear collision, the headrest is initially displaced towards the vehicle rear, however the headrest changes direction in a short time and begins to be displaced towards the vehicle front. Moreover, there is a large displacement of the headrest towards the vehicle front since the stay (46) (including the grommets (22)) has a lower bending rigidity towards the vehicle front than the bending rigidity towards the vehicle rear. The time until the headrest contacts the head (H) of the occupant can accordingly be shortened.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: March 14, 2017
    Assignee: NHK SPRING CO., LTD.
    Inventors: Masami Takayama, Atsushi Kageyama, Ken Okura, Junichi Nakano, Nozomu Munemura, Kensuke Nagai, Tadanori Hisamoto
  • Publication number: 20170029320
    Abstract: To provide a colored glass plate of which the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 can be stably maintained at a high level while amber coloring derived from salt cake (Na2SO4) is suppressed by reducing the amount of salt cake used as a refining agent, and which has less bubbles regardless of a small amount of total sulfur as calculated as SO3. A colored glass plate which is made of alkali-containing silica glass containing iron, tin and sulfur, wherein, as represented by mass % based on oxides, the proportion of total sulfur as calculated as SO3 is less than 0.025%, the proportion of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 45%, the proportion of divalent tin as calculated as SnO2 to total tin as calculated as SnO2 is at least 0.1% as represented by mol %, and ?-OH is at least 0.15 mm?1.
    Type: Application
    Filed: October 11, 2016
    Publication date: February 2, 2017
    Applicant: Asahi Glass Company, Limited
    Inventors: Kensuke NAGAI, Yuya SHIMADA, Yusuke ARAI
  • Patent number: 9403451
    Abstract: A headrest device comprising: a headrest stay that is coupled to an upper end portion of a seatback of a vehicle seat, and that supports a headrest pad; an internal structure that is embedded inside the headrest pad, that is supported from a rear by the headrest stay, and that supports a head of an occupant from the rear during a vehicle rear-on collision via a support face that is formed at a front face of the internal structure; and a forward projection portion that is configured by a portion of the headrest stay that projects forward, that is disposed at an upper side or a lower side of the support face within the headrest pad, and that suppresses the head supported by the support face from tilting backward or tilting forward by pivoting about the support face as a pivoting center.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: August 2, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Nozomu Munemura, Kensuke Nagai, Tadanori Hisamoto