Patents Assigned to Kabushiki Kaisha Ohara
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Patent number: 7396786Abstract: A glass containing 5 to 25 mass % of P2O5, 0 to 15 mass % of B2O3, 0 to 5 mass % of SiO2+GeO2, 21 to 50 mass % of BaO+SrO, 0 to 3 mass % of Li2O+Na2O+K2O, and 35 to 65 mass % of Nb2O5, not substantially containing PbO, satisfying Nb2O5/(BaO+SrO)=0.85 to 2.20, having a dielectric constant of 15 or greater, a dielectric loss of 10.0×10?4 or less, and a resistivity of 1.0×1016 ?·cm or more.Type: GrantFiled: January 22, 2003Date of Patent: July 8, 2008Assignee: Kabushiki Kaisha OharaInventors: Masaaki Miyata, Kazuo Ohara
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Patent number: 7371703Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43 W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.Type: GrantFiled: September 18, 2003Date of Patent: May 13, 2008Assignee: Kabushiki Kaisha OharaInventors: Akira Masumura, Muneo Nakahara, Satoru Matsumoto, Tatsuya Senoo
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Patent number: 7368404Abstract: An optical glass having a refractive index (nd) and Abbe number (?d) within a range enclosed with a border line consisting of straight lines connecting point A (nd being 1.75 and ?d being 50.0), point B (nd being 1.80 and ?d being 46.0), point C (nd being 1.80 and ?d being 50.0) and point D (nd being 1.75 and ?d being 56.0) in the order of the point A, the point B, the point C, the point D and the point A in x-y rectangular coordinates in which x coordinate represents Abbe number (?d) and y coordinate represents refractive index (nd), including refractive index (nd) and Abbe number (?d) on the border line except for the straight line connecting the point A with the point D and the straight line connecting the point B with the point C, containing, as essential components, SiO2, B2O3, La2O3, Gd2O3, Li2O and F, and being substantially free of As2O3.Type: GrantFiled: October 26, 2004Date of Patent: May 6, 2008Assignee: Kabushiki Kaisha OharaInventor: Susumu Uehara
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Patent number: 7335614Abstract: An optical glass having a refractive index (nd) and an Abbe number (vd) which are within an area surrounded by the straight lines which are drawn by connecting point A (nd=1.835, vd=46.5), point B (nd=1.90, vd=40.0), point C (nd=1.90, vd=35.0) and point D (nd=1.835, vd=38.0) in a sequence of A, B, C, D and A as border lines in x-y coordinates shown in FIG. 1, in which X-axis is the Abbe number (vd) and Y-axis is the refractive index (nd), the area including the border line. The optical glass has low glass transition temperature (Tg), and suitable for precision mold pressing.Type: GrantFiled: June 12, 2006Date of Patent: February 26, 2008Assignee: Kabushiki Kaisha OharaInventors: Susumu Uehara, Koji Shimizu, Shinya Mashiko
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Patent number: 7320949Abstract: An optical glass suitable for precision mold pressing has a refractive index (nd) of 1.88 or over and an Abbe number (? d) within a range from 22 to 28, comprises, in mass %, SiO2 15-25%? B2O3 0-5%? La2O3 0-5%? TiO2 5-15% ZrO2 0-10% Nb2O5 more than 30% and less than 50% WO3 0-5%? CaO 0-10% BaO 0-10% Li2O 3-12% Na2O 0-10% K2O 0-10% Bi2O3 0-15% Ta2O5 0-7%? and has a glass transition point (Tg) within a range from 500° C. to 580° C. The optical glass preferably has a yield point (At) within a range from 550° C. to 640° C.Type: GrantFiled: June 2, 2004Date of Patent: January 22, 2008Assignee: Kabushiki Kaisha OharaInventor: Susumu Uehara
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Patent number: 7306879Abstract: A lithium ion secondary cell comprises a positive electrode, a negative electrode, a solid electrolyte and a fiber layer provided in an interface between the solid electrolyte and the positive electrode and/or in an interface between the solid electrolyte and the negative electrode.Type: GrantFiled: May 27, 2003Date of Patent: December 11, 2007Assignee: Kabushiki Kaisha OharaInventors: Yasushi Inda, Kazuo Ohara, Tetsuo Uchiyama, Morinobu Endo
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Publication number: 20070259270Abstract: A lithium ion secondary cell comprises a positive electrode, a negative electrode, a solid electrolyte and a fiber layer provided in an interface between the solid electrolyte and the positive electrode and/or in an interface between the solid electrolyte and the negative electrode.Type: ApplicationFiled: June 6, 2007Publication date: November 8, 2007Applicant: Kabushiki Kaisha OharaInventors: Yasushi Inda, Kazuo Ohara, Tetsuo Uchiyama, Morinobu Endo
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Publication number: 20070197367Abstract: An optical glass has a refractive index (nd) of 1.60 or over and excellent transmittance and internal quality. The optical glass comprises 0.1-4 mass % of Ta2O5 to total mass of glass calculated on oxide basis, has ratio of 0.95<Ta2O5/(Ta2O5+(ZrO2)+TiO2+Nb2O5+WO3)×5)?1.00, and further comprises SiO2+B2O3+Al2O3+BaO in a total amount of 81% or over.Type: ApplicationFiled: March 9, 2005Publication date: August 23, 2007Applicant: Kabushiki Kaisha OharaInventor: Michiko Ogino
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Patent number: 7226881Abstract: There are provided glass-ceramics having an ultra low thermal expansion property and super flat surface capable of coping with lithography for the next generation LSI and component parts for semiconductor equipment such as masks, optical reflecting mirrors, wafer stages and reticle stages and various precision parts using such glass-ceramics. Glass-ceramics of the invention have an average linear thermal expansion coefficient within a range of 0.0±0.2×10?7/° C. within a temperature range from 0° C. to 50° C., have difference between the maximum value and the minimum value of ?L/L of 10×10?7 or below, and comprise SiO2, Al2O3 and P2O5 with the total amount thereof in mass % being within a range from 86.0% to 89.0%.Type: GrantFiled: February 6, 2004Date of Patent: June 5, 2007Assignee: Kabushiki Kaisha OharaInventor: Naoyuki Goto
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Patent number: 7217672Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.Type: GrantFiled: September 18, 2003Date of Patent: May 15, 2007Assignee: Kabushiki Kaisha OharaInventors: Akira Masumura, Muneo Nakahara, Satoru Matsumoto, Tatsuya Senoo
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Patent number: 7211532Abstract: There are provided glass-ceramics having a high lithium ion conductivity which include in mol %: P2O5 38–40% TiO2 25–45% M2O3 (where M is Al or Ga) ?5–15% Li2O 10–20% and contain Li1+X(Al, Ga)XTi2?X(PO4)3 (where 0<X<0.8) as a main crystal phases. There are also provided glass-ceramics having a high lithium ion conductivity which include in mol %: P2O5 ?26–40% SiO2 0.5–12% TiO2 ?30–45% M2O3 (where M is Al or Ga) ??5–10% Li2O ?10–18% and contain Li1+X+YMXTi2?XSiYP3?YO12 (where 0<X?0.4 and 0<Y?0.6) as a main crystal phase. There are also provided solid electrolytes for an electric cell and a gas sensor using alkali ion conductive glass-ceramics, and a solid electric cell and a gas sensor using alkali ion conductive glass-ceramics as a solid electrolyte.Type: GrantFiled: June 16, 2003Date of Patent: May 1, 2007Assignee: Kabushiki Kaisha OharaInventor: Jie Fu
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Patent number: 7196027Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43 W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.Type: GrantFiled: June 1, 2001Date of Patent: March 27, 2007Assignee: Kabushiki Kaisha OharaInventors: Akira Masumura, Muneo Nakahara, Satoru Matsumoto, Tatsuya Senoo
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Publication number: 20070048619Abstract: An all solid type lithium ion secondary battery which has high heat resistance and can be used over a broad temperature range, has a high battery capacity and an excellent charging discharging characteristic, and can be used stably for a long period of time includes an inorganic substance including a lithium ion conductive crystalline and is substantially free of an organic substance and an electrolytic solution. The inorganic substance comprising a lithium ion conductive crystalline preferably is lithium ion conductive glass-ceramics.Type: ApplicationFiled: December 1, 2005Publication date: March 1, 2007Applicant: KABUSHIKI KAISHA OHARAInventor: Yasushi Inda
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Patent number: 7164481Abstract: A coefficient of linear expansion measuring apparatus includes: two reflection plates between which a sample is put, a container to house them, which is filled with a gas having known rate of a refractive index variation, a temperature regulating member to set a temperature in the container variably, a light source to irradiate an irradiating light to reflecting surfaces of the reflection plates, a light receiving element to receive reflected lights in which the lights interferes each other and detecting a light intensity thereof, and a calculating member to calculate a coefficient of linear expansion of the sample, wherein: the calculating member calculates an optical path length variation between the reflecting surfaces from an output variation of the light receiving element, and calculates a length variation of the sample by correcting a part of the optical path length variation derived from the refractive index variation of the gas caused by the temperature variation.Type: GrantFiled: August 27, 2004Date of Patent: January 16, 2007Assignee: Kabushiki Kaisha OharaInventors: Nobuo Kawasaki, Toshihide Nakajima, Masahiko Daimon, Osamu Okajima
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Patent number: 7148164Abstract: There are provided low expansion transparent glass-ceramics obtained by heat treating a base glass produced at a relatively low melting temperature of 1530° C. or below. The glass-ceramics have an average linear thermal expansion coefficient within a range from +6×10?7/° C. to +35×10?7/° C., 80% transmittance wavelength (T80) of 700 nm or below, internal transmittance of 75% or over at light wavelength of 1550 nm, heat resisting temperature of 800° C. or over and Young's modulus of 90 GPa or over. The glass-ceramics comprise SiO2, Al2O3, MgO, CaO, BaO, ZnO, Li2O, TiO2 and ZrO2 and contain ?-quartz or ?-quartz solid solution as a predominant crystal phase. There are also provided optical waveguide elements and an arrayed waveguide grating (AWG) type planar lightwave circuit utilizing these glass-ceramics.Type: GrantFiled: April 24, 2001Date of Patent: December 12, 2006Assignee: Kabushiki Kaisha OharaInventors: Hiroyuki Minamikawa, Kazuo Ohara, Naoyuki Goto
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Patent number: 7138349Abstract: An optical glass having a refractive index (nd) and an Abbe number (vd) which are within an area surrounded by the straight lines which are drawn by connecting point A (nd=1.835, vd=46.5), point B (nd=1.90, vd=40.0), point C, (nd=1.90, vd=35.0) and point D (nd=1.835, vd=38.0) in a sequence of A, B, C, D and A as border lines in x-y coordinates shown in FIG. 1, in which X-axis is the Abbe number (vd) and Y-axis is the refractive index (nd), the area including the border line. The optical glass has low glass transition temperature (Tg), and suitable for precision mold pressing. The optical glass which has the refractive index (nd) and Abbe number (vd) within the above-described area, where the area includes the border lines, has the composition of SiO2—B2O3—La2O3—Gd2O3—Li2O—F system, the transition temperature (Tg) of 550 to 650° C., and is free from lead, cadmium, thorium, Y2O3, P2O5 and TeO2.Type: GrantFiled: December 12, 2003Date of Patent: November 21, 2006Assignee: Kabushiki Kaisha OharaInventors: Susumu Uehara, Koji Shimizu, Shinya Mashiko
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Patent number: 7138348Abstract: An optical glass has optical constants which are an refractive index (nd) of 1.70–1.75 and an Abbe number (vd) of 45.0–54.0; a glass transformation temperature (Tg) of 500–580° C. The glass has the following composition in mass percent of: SiO2 more than 5–15%; B2O3 20-less than 30%; a total amount of SiO2+B2O3 more than 25–40%; La2O3 more than 21-less than 30%; Y2O3 more than 5–15%; Gd2O3 0-less than 10%; ZrO2 1–8%; Nb2O5 0.1–5%; Ta2O5 more than 5–12%; a total amount of ZrO2+Nb2O5+Ta2O5 7–20%; ZnO 0–10%; CaO 0–10%; SrO 0–5%; BaO 0–10%; a total amount of ZnO+CaO+SrO+BaO 5–15%; Li2O 1–8%; Sb2O3 0–1%; and As2O3 0–1%. The glass is substantially free of Yb2O3 and Al2O3. Devitrification is not generated when the optical glass is kept at a temperature of 920° C. for two hours.Type: GrantFiled: December 10, 2003Date of Patent: November 21, 2006Assignee: Kabushiki Kaisha OharaInventor: Susumu Uehara
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Publication number: 20060229186Abstract: An optical glass having a refractive index (nd) and an Abbe number (?d) which are within an area surrounded by the straight lines which are drawn by connecting point A (nd=1.835, ?d=46.5), point B (nd=1.90, ?d=40.0), point C, (nd=1.90, ?d=35.0) and point D (nd=1.835, ?d=38.0) in a sequence of A, B, C, D and A as border lines in x-y coordinates shown in FIG. 1, in which X-axis is the Abbe number (?d) and Y-axis is the refractive index (nd), the area including the border line. The optical glass has low glass transition temperature (Tg), and suitable for precision mold pressing.Type: ApplicationFiled: June 12, 2006Publication date: October 12, 2006Applicant: KABUSHIKI KAISHA OHARAInventors: Susumu Uehara, Koji Shimizu, Shinya Mashiko
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Patent number: 7101625Abstract: Glass for a light filter capable of preventing variation of refractive index in a band-pass filter has a coefficient of thermal expansion within a range from 90×10?7/° C. to 120×10?7/° C. within a temperature range from ?20° C. to +70° C. and, preferably, Young's modulus of 75 GPa or over and Vickers hardness of 550 or over, and light transmittance for plate thickness of 10 mm of 90% or over within a wavelength range from 950 nm to 1600 nm.Type: GrantFiled: April 28, 2004Date of Patent: September 5, 2006Assignee: Kabushiki Kaisha OharaInventor: Naoyuki Goto
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Patent number: RE39437Abstract: A negative thermal expansion glass ceramic having a negative coefficient of thermal expansion, which is a sufficiently large absolute value in a temperature range of ?40° C. to +160° C. and a method for producing the same are provided. The negative thermal expansion glass ceramic has a coefficient of thermal expansion of ?25 to ?100×10?7/° C. in the temperature range of ?40° C. to +160° C., and comprises main crystalline phases which are one or more types selected from a group consisting of ?-eucryptite solid solution (?-Li2O•Al2O3•2SiO2 solid solution), ?-eucryptite (?-Li2O•Al2O3•2SiO2), ?-quartz solid solution (?-SiO2) solid solution), and ?-quartz (?-SiO2), wherein a total amount of crystals of the main crystalline phases can be 70 to 100% in mass percent.Type: GrantFiled: September 3, 2003Date of Patent: December 19, 2006Assignee: Kabushiki Kaisha OharaInventors: Ayako Yamaguchi, Naoyuki Goto