Patents by Inventor Shinkichi Miwa
Shinkichi Miwa 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).
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Patent number: 10173922Abstract: A glass composition SiO2, Al2O3, B2O3, and RO, where RO represents one kind or two or more kinds selected from MgO, CaO, SrO, and BaO, and allows two or more kinds of crystals selected from a SiO2—Al2O3—RO-based crystal, a SiO2-based crystal, and a SiO2—Al2O3-based crystal to precipitate in a temperature range of from a liquidus line temperature to (the liquidus line temperature—50° C.Type: GrantFiled: July 4, 2014Date of Patent: January 8, 2019Assignee: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Masahiro Hayashi, Shinkichi Miwa
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Patent number: 9598307Abstract: Devised are a glass and glass substrate, which contain an alkaline component at a low content, are low in density and thermal expansion coefficient, are high in strain point and Young's modulus, and are excellent in devitrification resistance, meltability, formability, and the like. That is, the glass of the present invention includes as a glass composition, in terms of mass %, 58 to 70% of SiO2, 16 to 25% of Al2O3, 3 to 8% of B2O3, 0 to 5% of MgO, 3 to 13% of CaO, 0 to 6% of SrO, 0 to 6% of BaO, 0 to 5% of ZnO, 0 to 5% of ZrO2, 0 to 5% of TiO2, and 0 to 5% of P2O5.Type: GrantFiled: December 6, 2013Date of Patent: March 21, 2017Assignee: NIPPON ELECTRONIC GLASS CO., LTD.Inventors: Shinkichi Miwa, Masahiro Hayashi
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Patent number: 9586854Abstract: Provided is an alkali-free glass, including as a glass composition, in terms of mol %, 60 to 70% of SiO2, 9.5 to 17% of Al2O3, 0 to 9% of B2O3, 0 to 8% of MgO, 2 to 15% of CaO, 0.1 to 10% of SrO, and 0.5 to 4% of BaO, having a molar ratio (CaO+SrO+BaO)Al2O3 of 0.6 to 1.0, and being substantially free of alkali metal oxides.Type: GrantFiled: December 25, 2012Date of Patent: March 7, 2017Assignee: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Takahiro Kawaguchi, Shinkichi Miwa
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Publication number: 20160368815Abstract: A glass composition SiO2, Al2O3, B2O3, and RO, where RO represents one kind or two or more kinds selected from MgO, CaO, SrO, and BaO, and allows two or more kinds of crystals selected from a SiO2—Al2O3—RO-based crystal, a SiO2-based crystal, and a SiO2—Al2O3-based crystal to precipitate in a temperature range of from a liquidus line temperature to (the liquidus line temperature—50° C.Type: ApplicationFiled: July 4, 2014Publication date: December 22, 2016Applicant: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Masahiro HAYASHI, Shinkichi MIWA
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Patent number: 9428417Abstract: Provided is a composite substrate, including a glass sheet and a resin sheet bonded to each other, in which the glass sheet has a refractive index nd of 1.55 or more and 2.3 or less and the resin sheet has a refractive index nd of 1.55 or more and 2.3 or less.Type: GrantFiled: July 12, 2012Date of Patent: August 30, 2016Assignee: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Tomoki Yanase, Atsushi Mushiake, Takashi Murata, Shinkichi Miwa
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Publication number: 20150315065Abstract: Devised are a glass and glass substrate, which contain an alkaline component at a low content, are low in density and thermal expansion coefficient, are high in strain point and Young's modulus, and are excellent in devitrification resistance, meltability, formability, and the like. That is, the glass of the present invention includes as a glass composition, in terms of mass %, 58 to 70% of SiO2, 16 to 25% of Al2O3, 3 to 8% of B2O3, 0 to 5% of MgO, 3 to 13% of CaO, 0 to 6% of SrO, 0 to 6% of BaO, 0 to 5% of ZnO, 0 to 5% of ZrO2, 0 to 5% of TiO2, and 0 to 5% of P2O5.Type: ApplicationFiled: December 6, 2013Publication date: November 5, 2015Applicant: Nippon Electric Glass Co., Ltd.Inventors: Shinkichi Miwa, Masahiro Hayashi
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Patent number: 9061938Abstract: Provided is an alkali-free glass, comprising, as a glass composition in terms of mass %, 58 to 70% of SiO2, 15.5 to 20% of Al2O3, 0 to 1% of B2O3, 0 to 5% of MgO, 3.5 to 16% of CaO, 0.5 to 6.5% of SrO, and 5 to 15% of BaO, being substantially free of alkali metal oxides, and having a strain point of more than 725° C.Type: GrantFiled: October 26, 2011Date of Patent: June 23, 2015Assignee: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Takahiro Kawaguchi, Shinkichi Miwa
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Publication number: 20150166402Abstract: Provided is a glass, including, as a glass composition, in mass % in terms of the following oxides, 40 to 65% of SiO2, 2 to 20% of Al2O3, 0 to 20% of B2O3, 0 to 15% of MgO, 0 to 15% of CaO, 0 to 20% of SrO, 0 to 20% of BaO, 0 to 10% of Li2O, 0.1 to 20% of Na2O, 0.1 to 20% of K2O, 0 to 10% of ZrO2, 0 to less than 0.04% of Fe2O3, and 0 to 0.5% of SO3, in which a transmittance of the glass with a thickness of 1.8 mm at a wavelength 1,100 nm is 86 to 92%.Type: ApplicationFiled: January 11, 2013Publication date: June 18, 2015Applicant: Nippon Electric Glass Co., Ltd.Inventors: Masato Muguruma, Hironori Takase, Shinkichi Miwa
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Patent number: 9023744Abstract: Provided is an alkali-free glass, which is substantially free of alkali metal oxides, and has a strain point of more than 680° C., an average coefficient of thermal expansion in the temperature range of 30 to 380° C. of 40 to 55×10?7/° C., and a liquidus temperature of less than 1,200° C. Further, the alkali-free glass comprises, as a glass composition in terms of mass %, 55 to 70% of SiO2, 10 to 20% of Al2O3, 0.1 to 4.5% of B2O3, 0 to 1% of MgO, 5 to 15% of CaO, 0.5 to 5% of SrO, and 5 to 15% of BaO.Type: GrantFiled: August 10, 2011Date of Patent: May 5, 2015Assignee: Nippon Electric Glass Co., Ltd.Inventors: Takahiro Kawaguchi, Shinkichi Miwa
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Publication number: 20140377525Abstract: Provided is an alkali-free glass, including as a glass composition, in terms of mol %, 60 to 70% of SiO2, 9.5 to 17% of Al2O3, 0 to 9% of B2O3, 0 to 8% of MgO, 2 to 15% of CaO, 0.1 to 10% of SrO, and 0.5 to 4% of BaO, having a molar ratio (CaO+SrO+BaO)Al2O3 of 0.6 to 1.0, and being substantially free of alkali metal oxides.Type: ApplicationFiled: December 25, 2012Publication date: December 25, 2014Inventors: Takahiro Kawaguchi, Shinkichi Miwa
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Patent number: 8835335Abstract: An alkali-free glass of the present invention comprises, as a glass composition expressed in terms of oxides by mass %, 45 to 70% of SiO2, 10 to 30% of Al2O3, 11 to 20% of B2O3, less than 0.1% of As2O3, less than 0.1% of Sb2O3, and less than 0.1% of an alkali metal oxide, and has a thermal expansion coefficient (30 to 380° C.) of 30 to 35×10?7/° C.Type: GrantFiled: March 19, 2010Date of Patent: September 16, 2014Assignee: Nippon Electric Glass Co., Ltd.Inventors: Takashi Murata, Shinkichi Miwa
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Patent number: 8785336Abstract: Provided is an alkali-free glass, comprising, as a glass composition in terms of mass %, 55 to 80% of SiO2, 10 to 25% of A12O3, 2 to 5.5% of B2O3, 3 to 8% of MgO, 3 to 10% of CaO, 0.5 to 5% of SrO, and 0.5 to 7% of BaO, having a molar ratio MgO/CaO of 0.5 to 1.5, being substantially free of alkali metal oxides, and having a Young's modulus of more than 80 GPa.Type: GrantFiled: March 9, 2012Date of Patent: July 22, 2014Assignee: Nippon Electric Glass Co., Ltd.Inventors: Takahiro Kawaguchi, Shinkichi Miwa
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Publication number: 20140154467Abstract: Provided is a composite substrate, including a glass sheet and a resin sheet bonded to each other, in which the glass sheet has a refractive index nd of 1.55 or more and 2.3 or less and the resin sheet has a refractive index nd of 1.55 or more and 2.3 or less.Type: ApplicationFiled: July 12, 2012Publication date: June 5, 2014Inventors: Tomoki Yanase, Atsushi Mushiake, Takashi Murata, Shinkichi Miwa
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Publication number: 20130244859Abstract: Provided is an alkali-free glass, which is substantially free of alkali metal oxides, and has a strain point of more than 680° C., an average coefficient of thermal expansion in the temperature range of 30 to 380° C. of 40 to 55×10?7/° C., and a liquidus temperature of less than 1,200° C. Further, the alkali-free glass comprises, as a glass composition in terms of mass %, 55 to 70% of SiO2, 10 to 20% of Al2O3, 0.1 to 4.5% of B2O3, 0 to 1% of MgO, 5 to 15% of CaO, 0.5 to 5% of SrO, and 5 to 15% of BaO.Type: ApplicationFiled: August 10, 2011Publication date: September 19, 2013Inventors: Takahiro Kawaguchi, Shinkichi Miwa
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Publication number: 20130237401Abstract: Provided is an alkali-free glass, comprising, as a glass composition in terms of mass %, 58 to 70% of SiO2, 15.5 to 20% of Al2O3, 0 to 1% of B2O3, 0 to 5% of MgO, 3.5 to 16% of CaO, 0.5 to 6.5% of SrO, and 5 to 15% of BaO, being substantially free of alkali metal oxides, and having a strain point of more than 725° C.Type: ApplicationFiled: October 26, 2011Publication date: September 12, 2013Inventors: Takahiro Kawaguchi, Shinkichi Miwa
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Patent number: 8455378Abstract: An alkali-free glass characterized by having a glass composition being substantially free of an alkali metal oxide, As2O3 and Sb2O3 and including, in terms of mol %, 55 to 75% of SiO2, 7 to 15% of Al2O3, 7 to 12% of B2O3, 0 to 3% of MgO, 7 to 12% of CaO, 0 to 5% of SrO, 0 to 2% of BaO, 0 to 5% of ZnO and 0.01 to 1% of SnO2 and has a liquidus viscosity of 105.2 dPa·s or higher and a temperature corresponding to a viscosity of 102.5 dPa·s of 1,550° C. or lower.Type: GrantFiled: June 26, 2009Date of Patent: June 4, 2013Assignee: Nippon Electric Glass Co., Ltd.Inventors: Tomoki Yanase, Shinkichi Miwa
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Patent number: 8426327Abstract: A technical object of the present invention is to satisfy various properties required in glass for liquid crystal displays and the like, in particular, fusibility, devitrification resistance, and like properties, and then to design a glass composition in which components harmful to the environment are reduced or substantially not contained, thereby obtaining a glass substrate that takes the environment into consideration. An alkali-free glass of the present invention contains the following glass composition in percent by weight based on oxide: 50 to 70% of SiO2, 10 to 20% of Al2O3, 8 to 12% of B2O3, 0 to 3% of MgO, 4 to 15% of CaO, 0 to 10% of SrO, 0 to 1% of BaO, and 0 to 5% of ZnO, and substantially free of alkali metal oxide and As2O3.Type: GrantFiled: May 22, 2007Date of Patent: April 23, 2013Assignee: Nippon Electric Glass Co., Ltd.Inventors: Tomoki Yanase, Shinkichi Miwa
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Publication number: 20120282450Abstract: Provided is an alkali-free glass, comprising, as a glass composition in terms of mass %, 55 to 80% of SiO2, 10 to 25% of Al2O3, 2 to 5.5% of B2O3, 3 to 8% of MgO, 3 to 10% of CaO, 0.5 to 5% of SrO, and 0.5 to 7% of BaO, having a molar ratio MgO/CaO of 0.5 to 1.5, being substantially free of alkali metal oxides, and having a Young's modulus of more than 80 GPa.Type: ApplicationFiled: March 9, 2012Publication date: November 8, 2012Inventors: Takahiro Kawaguchi, Shinkichi Miwa
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Publication number: 20120058306Abstract: A glass substrate comprises a first surface and a second surface. The first surface has an average surface roughness Ra of 0.2 nm or less, and the second surface has an average surface roughness Ra of 0.3 to 1.5 nm. At least the second surface is subjected to chemical treatment through atmospheric pressure plasma processing.Type: ApplicationFiled: May 7, 2010Publication date: March 8, 2012Inventors: Shinkichi Miwa, Tomoki Yanase
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Patent number: 8119999Abstract: Provided is a radiation-shielding glass, including a glass composition in % by mass of 10 to 35% SiO2, 55 to 80% PbO, 0 to 10% B2O3, 0 to 10% Al2O3, 0 to 10% SrO, 0 to 10% BaO, 0 to 10% Na2O, and 0 to 10% K2O, in which the radiation-shielding glass has a total light transmission at a wavelength of 400 nm at a thickness of 10 mm of 50% or higher. Also provided is a radiation-shielding glass which has the similar glass composition and can be used for a gamma-ray shielding glass for a PET examination.Type: GrantFiled: October 13, 2006Date of Patent: February 21, 2012Assignee: Nippon Electric Glass Co., Ltd.Inventors: Ken Choju, Shinkichi Miwa