And Zinc Patents (Class 501/79)
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Patent number: 6333288Abstract: The invention can relate to essentially lead-free optical glasses having a refractive index nd of from about 1.65 to about 1.87 and an Abbe number &ngr;d of from about 27 to about 43 and a composition (in % by weight, based on oxide) of SiO2 about 10-about 25, B2O3>about 10-about 25, Na2O about 2.5-about 10, K2O 0-about 3, CaO about 0.5-about 5, BaO about 15-about 30, ZnO about 5-about 15, TiO2 about 6-about 15, ZrO2 about 0.5-about 8, Y2O3 about 0.1-about 2, La2O3 about 0.5-about 8, Nb2O5 about 6-about 12, with La2O3+Nb2O5≦about 17,Ta2O5 0-about 1, and Gd2O3 0-about 1.Type: GrantFiled: May 8, 2000Date of Patent: December 25, 2001Assignee: Schott GlasInventors: Marc Clement, Silke Wolff, Magdalena Winkler-Trudewig
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Patent number: 6309989Abstract: A tin-borophosphate glass of the present invention has main components of SnO, B2O3, and P2O5, consists essentially of, by mole % representation, 30-70% SnO, 5-30% B2O3, and 24-45% (24% exclusive) P2O5, and satisfies a condition of B2O3/P2O5≧0.20 by mole ratio.Type: GrantFiled: November 29, 1999Date of Patent: October 30, 2001Assignee: Nippon Electric Glass Co., Ltd.Inventor: Takemi Kikutani
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Patent number: 6306783Abstract: A tin borophosphate glass for use in sealing materials includes, by mole, 30 to 80% of SnO, 5 to 60% of B2O3, and 5 to 24% of P2O5 as main components. The glass is free of lead but is of equal quality to those of conventional lead-containing sealing glasses. The glass can provide a satisfactory sealing material.Type: GrantFiled: February 2, 2000Date of Patent: October 23, 2001Assignee: Nippon Electric Glass Co., Ltd.Inventor: Toshio Yamanaka
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Patent number: 6297181Abstract: The invention relates to a barium-free, X-ray-opaque dental glass, to a dental glass/polymer composite comprising the glass, and to the use thereof as dental filling, where the dental glass has the following composition (in % by weight): SiO2 20-45, Al2O3 5-35, B2O3 1-10, Na2O 1-10, K2O 0-8, Cs2O 0-8, sum all alkali metal oxides 1-15, CaO 0-8, SrO 0-27, ZnO 2-20, ZrO2 2-10, P2O5 0-10, La2O3 0-10, F 2-20, the total content of B2O3, ZnO, ZrO2 and La2O3 is >20% by weight, and the refractive index nd of the dental glass is in the range from 1.47 to 1.70.Type: GrantFiled: October 27, 1999Date of Patent: October 2, 2001Assignee: Schott GlasInventors: Christian Kunert, Susanne Kessler, Hartmut Paschke, Alwin Weitzel, Ute Wolfel
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Patent number: 6287995Abstract: A sealing glass composition for bonding the upper plate and the lower plate of a flat panel display device is described. The sealing glass composition includes a low melting point glass containing PbO of less than 20% and having a sintering temperature of less than 500° C. The sealing glass composition contains a low component of PbO to thereby decrease environmental contamination and increase work efficiency. Also, the sealing glass prevents the deformation and cracking of a substrate caused by thermal and mechanical stress and reduces the sintering temperature to thereby enhance the airtightness of the sealing glass.Type: GrantFiled: May 21, 1999Date of Patent: September 11, 2001Assignee: LG Electronics Inc.Inventor: Yoon Kwan Lee
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Patent number: 6284687Abstract: The present invention relates to glasses of high refractive index having the following composition of oxides, expressed in percentages by weight: SiO2 29-35, B2O3 0.5-5, Li2O 0.5-3, Na2O 4-8, K2O 0-2, PbO 28-40, BaO 4-14, La2O3 4-12, TiO2 3-8, ZnO 0-8, ZrO2 0-4, Nb2O5 0-5, with: Li2O+Na2O+K2O 5.5-9; their use for the production of segments for multifocal corrective lenses; and multifocal corrective lenses incorporating at least one such segment in their structure.Type: GrantFiled: April 7, 2000Date of Patent: September 4, 2001Assignee: Corning S.A.Inventors: Marie M. J. Comte, Paulo Marques
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Patent number: 6271160Abstract: The present invention provides an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, can be used not only as a material for confirming an infrared laser or controlling an optical axis, but also as a material for recording or reproducing of &ggr;-rays, X-rays or UV-rays images and further can be used as an optical recording material of such a type that can be read. This glass material is represented, in term of atoms for making up the glass, by the following chemical composition (mol %): GeO2 21 to 80% ZnO 0 to 50% Ga2O2 0 to 55% (ZnO + Ga2O3 = 3 to 55%) Tb2O3 0 to 10% MnO 0 to 2% (Tb2O3 + MnO = 0.01 to 10%) R2O 0 to 45% (R: at least one atom selected from Li, Na, K and Cs) R′O 0 to 40% (R′: at least one atom selected from Mg, Ca, Sr and Ba) R2O + R′O 0.Type: GrantFiled: May 12, 1999Date of Patent: August 7, 2001Assignee: Sumita Optical Glass, Inc.Inventors: Yoshinori Yamamoto, Masaaki Yamazaki, Naruhito Sawanobori, Shinobu Nagahama
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Patent number: 6271161Abstract: A composition for barrier ribs of plasma display panels and to a method of fabricating such barrier ribs using the composition is disclosed. The composition for the barrier ribs is SiO2—ZnO—PbO—B2O3 based glass. The SiO2—ZnO—PbO—B2O3 based glass consists of 10˜20 wt % of SiO2, 10˜30 wt % of ZnO, 5˜30 wt % of PbO, 10˜30 wt % of B2O3, 2˜10 wt % of K2O, 0˜5 wt % of Li2O, 1˜5 wt % of CaO, 3˜8 wt % of Na2O, 1˜5 wt % of Al2O3, and 0˜2 wt % of Sb2O3. In the method of forming the barrier ribs, the SiO2—ZnO—PbO—B2O3 based glass powder free from an oxide filler is primarily prepared. Paste or slurry is formed by mixing the SiO2—ZnO—PbO—B2O3 based glass with an organic vehicle. A thick film, having a predetermined thickness, is formed on the top surface of a lower substrate using the paste or slurry. Desired barrier ribs are, thereafter, formed by processing the paste or slurry film.Type: GrantFiled: August 30, 1999Date of Patent: August 7, 2001Assignee: LG Electronics Inc.Inventors: Byung-Gil Ryu, Myeong-Soo Chang
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Patent number: 6255239Abstract: Lead-free alkali metal-free bismuth-borosilicate glass compositions are disclosed. These compositions are useful in preparing glass frits which are employed in glass enamel compositions which, in turn, are used to prepare glass enamel pastes. The glass enamel pastes can be coated on non-porous substrates and fused to form decorative and functional coatings on the substrates.Type: GrantFiled: December 4, 1998Date of Patent: July 3, 2001Assignee: Cerdec CorporationInventor: George E. Sakoske
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Patent number: 6251813Abstract: An optical glass having properties of a high refractive index and low dispersion and having both a low sag temperature Ts and a low liquidus temperature L.T., is provided. The optical glass comprises, by % by weight, 25 to 42% of B2O3, 14 to 30% of La2O3, 2 to 13% of Y2O3, 2 to 20 of SiO2, greater than 2% and 9% or less of Li2O, 0.5 to 20% of CaO, 2 to 20% of ZnO, 0 to 8% of Gd2O3, 0 to 8% of ZrO2, Gd2O3+ZrO2 being 0.5 to 12%, the total content thereof being at least 90%, and optionally contains 0 to 5% of Na2O, 0 to 5% of K2O, 0 to 5% of MgO, 0 to 5% of SrO, 0 to 10% of SrO, 0 to 10% of BaO, 0 to 5% of Ta2O, 0 to 5% of Al2O3, 0 to 5% of Yb2O3, 0 to 5% of Nb2O5, 0 to 2% of As2O3 and 0 to 2% of Sb2O3.Type: GrantFiled: April 27, 1999Date of Patent: June 26, 2001Assignee: Hoya CorporationInventor: Kouichi Sato
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Patent number: 6248679Abstract: A sealing glass composition in powdered form comprising a crystallizable PbO/ZnO/B2O3/SiO2 glass in the vitreous state, an effective amount of a nucleating agent, and an optional filler. The glass composition can be used to seal television picture tubes with excellent results when heated to a hold range of about 420° C. to about 435° C.Type: GrantFiled: November 18, 1996Date of Patent: June 19, 2001Assignee: Techneglas, Inc.Inventor: Jon Bobinski
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Patent number: 6245699Abstract: A sealing glass composition in powdered form comprising a crystallizable base glass in the vitreous state and vanadium zirconium silicate in an amount from about 0.1 to 1 weight percent of the base glass. The sealing glass also may contain aluminum oxide having a particle size of about 90 to 99 percent minus 325 mesh in an amount from about 0.1 to 1.0 weight percent of the base glass and bismuth nitrate in an amount from about 0.02 to 0.08 weight percent of the base glass. The glass composition can be used to seal cathode ray tube face plates and funnels with excellent results when heated to a hold range of about 4300 C to 4500 C. The crystallized sealing glass exhibits improved adhesion to seal edges of the face plates and funnels, increased strength, and improved resistance to organic contamination.Type: GrantFiled: April 30, 1999Date of Patent: June 12, 2001Assignee: Techneglas, Inc.Inventors: Carl J. Hudecek, Joseph V. Peer, Jon G. Bobinski
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Patent number: 6240235Abstract: The optical fiber fixing member made of glass, especially optical fiber guide block, is conventionally produced by a mechanical processing. However, the mechanical processing has problems that a production cost becomes high and mass-production is difficult. The problems above can be solved by the present invention providing a method for producing an optical fiber fixing member comprising: disposing a glass shaping preform whose plane view resembles to the plane view of the molded article and whose faces to be positioned in the pressurizing direction during press-molding assumes planes or outwardly convex curved surfaces, in a mold having a cavity of a given shape; and heating the glass shaping preform up to a temperature at which the glass shaping preform can be mold-shaping and thereby press-molding it into a molded article having at least one edge formed of a free surface.Type: GrantFiled: April 23, 1998Date of Patent: May 29, 2001Assignees: Hoya Corporation, Hoya Precision Inc.Inventors: Ken Uno, Masahiro Yoshida, Teruo Yamashita, Shinichiro Hirota, Yoshiatsu Yokoo
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Patent number: 6225244Abstract: A glass for a near infrared absorption filter, which has spectral characteristics that it efficiently transmits light in a wavelength region of from ultraviolet region to 600 nm and selectively absorbs light in a near infrared region of a wavelength of larger than about 600 nm, a near infrared absorption filter formed of the above glass, and a solid-state image sensing device to which the above filter is applied, the glass comprising, by cationic %, 35 to 54% of P, 20 to 47% of Zn, 0 to 8% of the total, R, of Li, Na, K and Cs which are monovalent metal elements, 0 to 17% of the total, M, of Mg, Ca, Ba, Sr and Pb which are divalent metal elements, the total of R and M being 1 to 22%, 0.1 to 7% of As, 0.2 to 9% of Cu and 0 to 6% of Al.Type: GrantFiled: January 20, 1999Date of Patent: May 1, 2001Assignee: Hoya CorporationInventor: Hironori Oguma
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Patent number: 6196684Abstract: The present invention relates to glasses of high refractive index having the following composition of oxides, expressed in percentages by weight: SiO2 27-36 B2O3 0-9 Li2O 1-5 Na2O 1-7 K2O 0-7 CaO 0-7 BaO 4-13 ZnO 0-8 La2O3 4-15 PbO 4-27 TiO2 7-18 ZrO2 0-9 Nb2O5 0-8 with: Li2O + Na2O + K2O 6-15 SiO2 + TiO2 + ZrO2 42-55 PbO + TiO2 + ZrO2 + Nb2O5 29-40; their use for the production of segments for multifocal corrective lenses; and multifocal corrective lenses incorporating at least one such segment in their structure.Type: GrantFiled: June 2, 2000Date of Patent: March 6, 2001Assignee: Corning S.A.Inventors: Marie M. J. Comte, Paulo Marques
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Patent number: 6187702Abstract: Ophthalmic and optical glasses have a composition in weight percent of 4.5-9.5% SiO2, 10-19.5% B2O3, 0-3% Al2O3, 0-5% GeO2, 18—less than 23% La2O3, 0.3—less than 2% Gd2O3, 5.5-13.5% TiO2, 0-7.5% ZrO2, 15-21% Nb2O5, 0-1.5% Ta2O5, 0.3-5% WO3, with the proviso that (Ta2O5+WO3)/B2O3 is 0.5 or below in the ration terms of weight, 2.1-10% ZnO, 0-5% MgO, 7-12.5% CaO, 0-5% SrO, 0-4% BaO, ≧0.1% Li2O+Na2O+K2O in which 0-1% Li2O, 0-1% Na2O and 0-1% K2O, 0-0.5% As2O3 and 0-0.5% Sb2O3 and have a specific gravity of 4.1 or below, and optical constants of a refractive index (nd) exceeding 1.88 and up to 1.93 and an Abbe number j(&ngr; d) within a range from 28 to 31. A preferable range of Nb2O5 is 15.5—less than 20.5% and a more preferable range of Nb2O5 is less 15.5-20%.Type: GrantFiled: September 29, 1999Date of Patent: February 13, 2001Assignee: Kabushiki Kaisha OharaInventor: Michiko Morishita
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Patent number: 6184163Abstract: A dielectric composition for a plasma display panel. In the dielectric composition, a SiO3—ZnO—B2O3 group glass is used. Accordingly, the dielectric composition is capable of meeting optical, thermal and electrical characteristic requirements of a dielectric layer and allows the dielectric layer to have a light weight.Type: GrantFiled: December 10, 1998Date of Patent: February 6, 2001Assignee: LG Electronics Inc.Inventors: Yoon Kwan Lee, Byung Gil Ryu
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Patent number: 6171987Abstract: A glass composition comprising, in mole percent of the total composition: glass-forming compounds in a total amount of 75 to 85%, wherein said glass forming compounds comprise 40 to 65% SiO2, 10 to 20% Bi2O3 and 0.1 to 3% Al2O3, and glass modifiers in a total amount of 15 to 25%, wherein said glass modifiers comprise 1 to 23 % ZnO, 0.1 to 5% CuO, 0.1 to 5 CaO and 0.1 to 2% MgO, thick film formulations containing said composition and uses thereof.Type: GrantFiled: August 28, 1998Date of Patent: January 9, 2001Assignee: Ben-Gurion University of the NegevInventor: Jacob Hormadaly
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Patent number: 6158248Abstract: A fused-cast-alumina-zirconia-silica refractory consisting essentially of corundum crystals, baddeleyite crystals and a matrix glass phase and having a chemical composition comprising (a) from 30 to 70 wt % of Al.sub.2 O.sub.3, (b) from 20 to 59 wt % of ZrO.sub.2, (c) from 5 to 12 wt % of SiO.sub.2, (d) from 0.15 to 0.60 wt % of Na.sub.2 O, (e) from 0 to 0.50 wt % of K.sub.2 O, (f) from 0 to 0.40 wt % of Li.sub.2 O, (g) from 0.05 to 0.80 wt % of B.sub.2 O.sub.3, (h) from 0.05 to 0.80 wt % of P.sub.2 O.sub.5, and (i) from 0.05 to 0.50 wt % in total of at least one member selected from the group consisting of SnO.sub.2, ZnO, CuO and MnO.sub.2.Type: GrantFiled: February 24, 1999Date of Patent: December 12, 2000Assignee: Asahi Glass Company Ltd.Inventor: Yoshihisa Beppu
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Patent number: 6123872Abstract: The present invention provides an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, whereby energy can be accumulated by radiation excitation, for example, by .gamma.-rays, X-rays, UV-rays, etc., light emission can be continued for a long time even after stopping the excitation. Furthermore, the long lasting afterglow and photostimulated luminescence oxide glass can be used not only as a phosphorescent material for night illumination or night signal, but also as a material for confirming an infrared laser or controlling an optical axis because of exhibiting photostimulated luminescence by irradiation of infrared rays or visible rays. In addition, this glass is useful for recording or reproducing of .gamma.-rays, X-rays or UV-rays images. This glass material is represented, in term of atoms for making up the glass, by the following chemical composition (mol %):______________________________________ SiO.sub.2 1 to 55% B.sub.2 O.sub.3 1 to 50% (SiO.sub.2 + B.sub.2 O.Type: GrantFiled: December 16, 1998Date of Patent: September 26, 2000Assignee: Sumita Optical Glass, Inc.Inventors: Masaaki Yamazaki, Yoshinori Yamamoto, Naruhito Sawanobori, Shinobu Nagahama
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Patent number: 6121176Abstract: The invention concerns glasses that have a refractive index of more than 1.880, an Abbe number of more than or equal to 30.4, and a density of more than 4.1, and having the following chemical composition, expressed in wt. %, based on the oxides: SiO.sub.2 : 6-9, B.sub.2 O.sub.3 : 15-19, with SiO.sub.2 +B.sub.2 O.sub.3 <26, Nb.sub.2 O.sub.5 : 12 to <20.5, ZrO.sub.2 : 8-10, TiO.sub.2 : 7-11, La.sub.2 O.sub.3 : 23-32, with ZrO.sub.2 +TiO.sub.2 +La.sub.2 O.sub.3 : .gtoreq.44, CaO: 8 to <13, SrO: 0-2, BaO: 0-2, MgO: 0-2, ZnO: 0-5, with CaO+SrO+BaO+MgO+ZnO: .gtoreq.9, Y.sub.2 O.sub.3 : 0-5, WO.sub.3 : 0-5, Li.sub.2 O+Na.sub.2 O+K.sub.2 O: 0-2, others 0-1.Type: GrantFiled: July 9, 1999Date of Patent: September 19, 2000Assignee: Corning S.A.Inventor: Marie Jacqueline Monique Comte
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Patent number: 6083858Abstract: The present invention relates to a sealing glass composition, which is able to seal a panel and funnel of a color TV at low temperature for a short time by adding Garnet(Fe.sub.3 Al.sub.2 Si.sub.3 O.sub.12) as a nucleating agent and filler component to control the thermal expansion coefficient.Type: GrantFiled: March 8, 1999Date of Patent: July 4, 2000Assignee: Samsung Corning Co., Ltd.Inventors: Tae Ho Park, Sung Hoon Moon, Young Gil Nam
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Patent number: 6022624Abstract: A ceramic enamel composition contains 40-80% by weight of at least one lead-free metal oxide frit containing precursors of Zn.sub.2 SiO.sub.4, such as ZnO and SiO.sub.2, wherein the amount of Zn.sub.2 SiO.sub.4 precursors is less than about 35% by weight of the at least one lead-free metal oxide frit, 0.05-15% by weight of a zinc silicate seed material, and 19-37% by weight of a pigment. The zinc silicate seed material preferably contains crystalline Zn.sub.2 SiO.sub.4. The enamel preferably also contains a bismuth silicate seed material. The ceramic enamel can be employed as a coating around the periphery of automotive glass and is effective in improving appearance and reducing degradation of underlying adhesives by ultraviolet radiation.Type: GrantFiled: May 3, 1999Date of Patent: February 8, 2000Assignee: Cerdec CorporationInventor: George E. Sakoske
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Patent number: 6010973Abstract: A dielectric forming material for a plasma display panel enables to form a dielectric layer having a high dielectric strength and good transparency. The dielectric forming material is provided with a green sheet in form that comprises, as a component, glass powder having a 50% particle diameter D.sub.50 which is not more than 2.8 .mu.m. Preferably, the glass powder preferably may have the maximum particle diameter D.sub.MAX which is not more than 18 .mu.m. Desirably, the green sheet essentially may consist by weight of 60-80% the glass powder, 0-10% ceramic powder, 5-30% thermoplastic resin, and 0-10% plasticizer.Type: GrantFiled: July 28, 1998Date of Patent: January 4, 2000Assignee: Nippon Electric Glass, Co., Ltd.Inventors: Hiromitsu Watanabe, Hiroyuki Oshita, Masahiko Ohji, Kazuo Hadano
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Patent number: 6004894Abstract: The present invention provides a porcelain enamel coating composition for use in forming a coating composition upon a metal substrate having an infrared reflectivity of at least 50% at 2.5 .mu.-microns measured with a Perkin Elmer Lambda 19 UV/VIS/NIR spectrometer with a labsphere RSA-PE 19 reflectance spectroscopy accessory. The coating composition comprises a glass component and a separate and distinct addition of cerium oxide. Preferably, the coating composition comprises from about 0.20% to about 3.0% by weight of the cerium oxide.Type: GrantFiled: October 28, 1998Date of Patent: December 21, 1999Assignee: Ferro CorporationInventors: William D. Faust, Holger F. Evele
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Patent number: 5998037Abstract: The present invention provides a new and improved coating composition for use in forming a dielectric layer upon a section of metal upon firing. The coating composition includes a glass composition, said glass composition comprising in weight percent a combined weight of BaO and SrO of from about 15% to about 75%, from about 5% to about 35% B.sub.2 O.sub.3, from about 10% to about 40% SiO.sub.2, up to about 10% Al.sub.2 O.sub.3, up to about 7% Co.sub.3 O.sub.4, up to about 20% ZnO, up to about 20% TiO.sub.2, up to about 7% P.sub.2 O.sub.5, up to about 7% CuO, up to about 7% Fe.sub.2 O.sub.3, up to about 7% NiO, a combined weight of SnO, MoO.sub.3, WO.sub.3, Sb.sub.2 O.sub.5, of up to about 20%, up to about 20% Bi.sub.2 O.sub.3, a combined weight of up to about 20% Nb.sub.2 O.sub.5, La.sub.2 O.sub.3, Y.sub.2 O.sub.3 and CeO.sub.2, up to about 5% ZrO.sub.2, up to about 20% CaO, up to about 5% MgO, up to about 2% As.sub.2 O.sub.3 and a combined weight of up to about 3% Li.sub.2 O, Na.sub.2 O and K.sub.2 O.Type: GrantFiled: December 22, 1997Date of Patent: December 7, 1999Assignee: Ferro CorporationInventors: Srinivasan Sridharan, William D. Faust, Gordon J. Roberts
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Patent number: 5952256Abstract: An optical glass has a large negative anomalous dispersion value and optical constants of refractive index (nd) within a range of 1.65-1.80 and Abbe number (.nu.d) within a range of 28-42. The optical glass includes, as its essential ingredients, in weight percent, 20-50% SiO.sub.2, 6-20% B.sub.2 O.sub.3 where SiO.sub.2 /B.sub.2 O.sub.3 .ltoreq.6, 0.5-15% ZrO.sub.2 and 31-50% Nb.sub.2 O.sub.5.Type: GrantFiled: March 12, 1998Date of Patent: September 14, 1999Assignee: Kabushiki Kaisha OharaInventors: Michiko Morishita, Masahiro Onozawa
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Patent number: 5922444Abstract: A glaze composition suitable for a thin chip substrate, for example. The glaze composition makes a low-temperature glazing possible and is superior in the electrical and chemical stability. The glaze composition can prevent even a thin substrate from warping and can easily form an extensive smooth glaze layer without deteriorating a thin glaze face. The components of the composition are 20% to 50% by weight of boron oxide, 5% to 35% by weight of aluminum oxide, and 15% to 55% by weight of at least one alkaline-earth oxide selected from the group consisting of calcium oxide, strontium oxide, magnesium oxide and barium oxide.Type: GrantFiled: September 22, 1994Date of Patent: July 13, 1999Assignee: NGK Spark Plug Co., Ltd.Inventors: Masashi Tsuzuki, Masahiko Okuyama
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Patent number: 5858898Abstract: An optical glass having optical constants of refractive index within the range of 1.55-1.75 and Abbe number (.nu. d) within the range of 25-51 and having large negative anomalous dispersion which is substantially free of lead and arsenic compounds includes as its essential ingredients in weigth percent 10->40% SiO.sub.2, 12.5-35% B.sub.2 O.sub.3, 3-20% ZrO.sub.2 and 6-30% Nb.sub.2 O.sub.5.Type: GrantFiled: October 6, 1997Date of Patent: January 12, 1999Assignee: Kabushiki Kaisha OharaInventors: Muneo Nakahara, Michiko Morishita
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Patent number: 5858895Abstract: A heat-resistant glass which has heat resistance sufficient for being free from viscous flowing, e.g., at a temperature of 600.degree. C. or higher, and devitrification resistance adequate for producing a panel of glass, which has, as thermal properties, an expansion coefficient equivalent or close to that of a sealing glass frit, with retaining electrical insulation properties excellent over conventional glass, and which can be used for the production of plate-shaped articles of glass such as a glass substrate, the heat-resistant glass containing, as glass components,______________________________________ 30-45% SiO.sub.2 1-10% B.sub.2 Ohd 3 1-7% Al.sub.2 O.sub.3 1-17% SrO 22-less than 35% BaO 0-5% MgO and 0-14% CaO ______________________________________the above % standing for % by weight, provided that the total amount of MgO+CaO is over 4% to 16% by weight.Type: GrantFiled: March 11, 1997Date of Patent: January 12, 1999Assignee: Hoya CorporationInventors: Hirozi Sagara, Koichi Sato
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Patent number: 5855810Abstract: A soft ferrite material for manufacturing a device for shielding electromagnetic frequencies such as wire coiling inductors and chip components including chip inductors and chip beads is disclosed. Particularly, an Ni--Cu--An soft ferrite material and a method for manufacturing a wire coiling type or chip type inductor using the ferrite material are disclosed, in which a low temperature sintering is possible, the variations of the electromagnetic properties are low as against an external stress, and the electromagnetic properties are superior. A B.sub.2 O.sub.3 --Bi.sub.2 O.sub.3 --ZnO glass is added in an amount of 0.05-15.0 wt % to the ordinary Ni--Cu--Zn soft raw material, and this mixture is sintered at a temperature of 860.degree.-910.degree. C.Type: GrantFiled: June 19, 1997Date of Patent: January 5, 1999Assignee: Samsung Electro-Mechanics Co., Ltd.Inventor: Chang Sik Kim
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Patent number: 5853608Abstract: A radio frequency soft ferrite material for manufacturing a device for shielding radio frequencies such as wire coiling inductors and chip components including chip inductors and chip beads is disclosed. Particularly, an Ni--Cu--Zn soft ferrite material and a method for manufacturing a wire coiling type or chip type inductor using the ferrite material are disclosed, in which a low temperature sintering is possible, the variations of the electromagnetic properties are low as against an external stress, and the radio frequency characteristics are superior. A B.sub.2 O.sub.3 --Bi.sub.2 O.sub.3 --ZnO glass is added in an amount of 1-25 wt % to the ordinary Ni--Cu--Zn soft ferrite powder, and this mixture is sintered at a temperature of 860.degree.-910.degree. C.Type: GrantFiled: June 19, 1997Date of Patent: December 29, 1998Assignee: Samsung Electro-Mechanics Co., Ltd.Inventor: Chang Sik Kim
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Patent number: 5783507Abstract: A ceramic enamel composition contains 40-80% by weight of at least one lead-free metal oxide frit containing precursors of Zn.sub.2 SiO.sub.4, such as ZnO and SiO.sub.2, wherein the amount of Zn.sub.2 SiO.sub.4 precursors is less than about 35% by weight of the at least one lead-free metal oxide frit, 0.05-15% by weight of a zinc silicate seed material, and 19-37% by weight of a pigment. The zinc silicate seed material preferably contains crystalline Zn.sub.2 SiO.sub.4. The enamel preferably also contains a bismuth silicate seed material. The ceramic enamel can be employed as a coating around the periphery of automotive glass and is effective in improving appearance and reducing degradation of underlying adhesives by ultraviolet radiation.Type: GrantFiled: January 16, 1997Date of Patent: July 21, 1998Assignee: Cerdec CorporationInventor: George E. Sakoske
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Patent number: 5763339Abstract: A lead-free insulating glass composition comprises (A) 50 to 85 wt. % of a glass comprising, on a weight basis, 28 to 38% of SiO.sub.2, 4 to 10% of B.sub.2 O.sub.3, 8 to 16% of Al.sub.2 O.sub.3, 15 to 23% of MgO, 1 to 12% of CaO, 3 to 9% of BaO, 8 to 16% of ZnO, and 3 to 8% of ZrO.sub.2 ; and (B) 50 to 15 wt. % of at least one filler selected from the group consisting of alumina and zircon. When using this glass composition as an insulating layer of a thick-film multilayer circuit board, there can be obtained a highly reliable thick-film multilayer circuit board in which the warpage of the substrate and leakage current are greatly reduced and the withstand voltage is highly improved.Type: GrantFiled: January 10, 1997Date of Patent: June 9, 1998Assignee: Shoei Chemical Inc.Inventors: Eiichi Asada, Tetsuya Tanaka
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Patent number: 5753571Abstract: A lead and cadmium-free encapsulant glass composition consisting essentially of by weight %, 60-80% Bi.sub.2 O.sub.3, 6-14% SiO.sub.2, 5-12% B.sub.2 O.sub.3, 5-10% Al.sub.2 O.sub.3 and 0-4% ZnO.Type: GrantFiled: February 13, 1997Date of Patent: May 19, 1998Assignee: E. I. du Pont de Nemours and CompanyInventor: Paul C. Donohue
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Patent number: 5733828Abstract: A hermetic sealing composition consisting essentially of from 60 to 99 wt % of a bismuth type low melting glass powder and from 1 to 40 wt % of a low expansion ceramic filler powder, wherein the low melting glass has a composition consisting essentially of:______________________________________ Bi.sub.2 O.sub.3 77 to 95 wt %, MgO + ZnO 1 to 20 wt %, B.sub.2 O.sub.3 2 to 10 wt %, SiO.sub.2 0 to 1 wt % and CeO.sub.2 0 to 10 wt %.Type: GrantFiled: February 10, 1997Date of Patent: March 31, 1998Assignee: Asahi Glass Company Ltd.Inventors: Hiroshi Usui, Tsuneo Manabe, Kazuo Harada, Ryuichi Tanabe
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Patent number: 5725808Abstract: A ceramic mixture of a crystallizable ZnO--MgO--B.sub.2 O.sub.3 --SiO.sub.2 glass mixed with a non-crystallizing lead-based glass and one or more oxide fillers forms a fired ceramic that has a TCE compatible with that of kovar. Green tapes made from the ceramic mixture aligned with a kovar support substrate when fired have excellent dielectric and low loss properties.Type: GrantFiled: May 23, 1996Date of Patent: March 10, 1998Assignees: David Sarnoff Research Center, Inc., Sharp K.K.Inventors: Ellen Schwartz Tormey, Ashok Naryan Prabhu
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Patent number: 5677250Abstract: A lead-free ceramic glaze comprising, by weight:(i) between about 27 and 35% SiO.sub.2 ;(ii) between about 9 and 15% Al.sub.2 O.sub.3 ;(iii) between about 26 and 34% B.sub.2 O.sub.3 ;(iv) between about 4 and 9% BaO;(v) up to about 2.5% CaO;(vi) between about 3 and 8% SrO;(vii) between about 6 and 12% ZnO;(viii) up to about 1% K.sub.2 O;(ix) between about 1 and 4% Li.sub.2 O;(x) between about 1.5 and 3% Na.sub.2 O; and(xi) balance of minor impurities.Also disclosed are ceramic substrates spray coated with such composition and a method for making a lead-free glaze to a ceramic substrate using lower firing temperatures, on the order of 1550.degree. to 1650.degree. F. (843.degree. to 899.degree. C.).Type: GrantFiled: April 26, 1996Date of Patent: October 14, 1997Assignee: Cooper Industries, Inc.Inventor: Randy O. Knapp
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Patent number: 5677251Abstract: A ceramic enamel composition is described which contains a zinc-containing oxide frit, a zinc borate seed material, a pigment, and a vehicle. The zinc borate seed material is preferably crystalline in nature, and promotes crystal growth upon firing. A preferred crystalline zinc borate seed material is selected from the phases Zn.sub.3 B.sub.2 O.sub.6 and Zn(BO.sub.2).sub.2, and mixtures thereof. Upon firing and press-forming a glass substrate coated with the enamel, components of the enamel adhere to the substrate while reducing sticking of the coated region to the forming die. The ceramic enamel is particularly useful in providing a colored border around the periphery of automotive glass and is effective in improving appearance and reducing degradation of underlying adhesives by ultraviolet radiation.Type: GrantFiled: April 25, 1996Date of Patent: October 14, 1997Assignee: Cerdec CorporationInventor: George E. Sakoske
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Patent number: 5668066Abstract: A near infrared absorption filter glass containing______________________________________ P.sub.2 O.sub.5 35.about.50% Li.sub.2 O 0.about.5% Na.sub.2 O 0.about.12% K.sub.2 O 0.about.20% Cs.sub.2 O 0.about.20% R.sub.2 O (in which R is an alkali metal) 1.5.about.20% ZnO 17.about.48% MgO 0.about.7% CaO 0.about.7% SrO 0.about.7% BaO 0.about.12% R'O (in which R' is an alkaline earth metal) 0.about.15% CuO 0.2.about.12% ______________________________________ in which % stands for % by weighthas excellent transmittance characteristics in the ultraviolet region over conventional phosphate-based glass, has glass stability and processability which enable the mass production, and further has sufficient weatherability.Type: GrantFiled: July 24, 1996Date of Patent: September 16, 1997Assignee: Hoya CorporationInventors: Hironori Oguma, Kazuo Tachiwana
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Patent number: 5650364Abstract: The present invention relates to self-opacifying enamel frit compositions that can be used for the enamelling of aluminium or aluminium alloys.Type: GrantFiled: February 20, 1996Date of Patent: July 22, 1997Assignee: Bayer AktiengesellschaftInventors: Rainer Munstedt, Marc Leveaux, Nancy Crevits, Wolfgang Podesta, Antoine Dhaese
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Patent number: 5629247Abstract: A flux composition containing as a first component:50 to 75% by weight Bi.sub.2 O.sub.3 ;15 to 25% by weight SiO.sub.2 ;4 to 10% by weight B.sub.2 O.sub.3 ;2 to 9% by weight ZnO;1 to 4% by weight alkali oxide; andoptionally as a second component a compound selected from CaO, ZrO.sub.2, MgO, SrO, Al.sub.2 O.sub.3, SnO.sub.2, TiO.sub.2, BaO, MoO.sub.3, F.sub.2 and Fe.sub.2 O.sub.3. The flux composition is typically used as a major component of a paint composition having minor portions of a pigment and liquid medium. The paint compositions are particularly suited for coating glass.Type: GrantFiled: May 8, 1996Date of Patent: May 13, 1997Assignee: The O'Hommel CompanyInventor: Robert Prunchak
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Patent number: 5618764Abstract: A colored ceramic composition comprising, as inorganic components, from 5 to 40 wt % of a colored heat resistance pigment powder, from 60 to 95 wt % of a zinc-containing glass powder and from 0 to 10 wt % of a refractory filler powder, wherein said glass powder consists essentially of the following components:______________________________________ SiO.sub.2 27 to 40 wt % B.sub.2 O.sub.3 10 to 20 wt % ZnO 35 to 45 wt % Li.sub.2 O 0 to 5 wt % Na.sub.2 O 0 to 10 wt % K.sub.2 O 0 to 5 wt % Li.sub.2 O + Na.sub.2 O + K.sub.2 O 0 to 15 wt %.Type: GrantFiled: September 14, 1995Date of Patent: April 8, 1997Assignee: Asahi Glass Company Ltd.Inventors: Hiroshi Usui, Hitoshi Onoda, Tsuneo Manabe
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Patent number: 5616417Abstract: Lead-free glass frits having the following composition in weight percent:______________________________________ ZnO 25-35 SiO.sub.2 10-17 ZrO.sub.2 0-2 Al.sub.2 O.sub.3 0-4 Na.sub.2 O 8-12 B.sub.2 O.sub.3 20-30 Bi.sub.2 O.sub.3 6-25 F.sup.-1 1-5 ______________________________________are useful in the formulation of ceramic enamel compositions.Type: GrantFiled: June 12, 1996Date of Patent: April 1, 1997Assignee: Cerdec CorporationInventor: Joseph W. Ryan
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Patent number: 5607886Abstract: An optical glass having optical constants of a refractive index (Nd) from 1.50 to 1.60 and an Abbe number (.nu.d) ranging from 62 to 73, a transformation temperature (Tg) of 550.degree. C. or below, and barely cracks or sticks to metal molds when the glass is subjected to mold pressing, maintains excellent chemical durability, and having softening capability at a low temperature which can be obtained by restricting the composition of the glass in weight percents within a specific range of a SiO.sub.2 --Al.sub.2 O.sub.3 --P.sub.2 O.sub.5 --R.sub.2 O system.Type: GrantFiled: October 6, 1995Date of Patent: March 4, 1997Assignee: Kabushiki Kaisya OharaInventor: Masahiro Onozawa
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Patent number: 5559059Abstract: Lead-free glass frits having the following composition in weight percent:______________________________________ ZnO 25-35 SiO.sub.2 10-17 ZrO.sub.2 0-2 Al.sub.2 O.sub.3 0-4 Na.sub.2 O 8-12 B.sub.2 O.sub.3 20-30 Bi.sub.2 O.sub.3 6-25 F.sup.-1 1-5 ______________________________________are useful in the formulation of ceramic enamel compositions.Type: GrantFiled: May 22, 1995Date of Patent: September 24, 1996Assignee: Cerdec CorporationInventor: Joseph W. Ryan
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Patent number: 5537505Abstract: The present invention is directed to the preparation of two groups of transparent glass-ceramics exhibiting high optical clarity and containing essentially only one crystal phase. The first group consists essentially, in cation percent, of______________________________________ SiO.sub.2 20-35 PbF.sub.2 19-23 AlO.sub.1.5 10-20 YF.sub.3 3-7, CdF.sub.2 19-34 ______________________________________and the second group consists essentially, in cation percent, of ______________________________________ SiO.sub.2 20-35 PbF.sub.2 15-25 AlO.sub.1.5 10-20 YF.sub.3 3-7 CdF.sub.2 21-31 ZnF.sub.2 3-7. ______________________________________These glass-ceramics may be used to fabricate optical waveguide fibers. Also when doped with certain rare earth elements, notably Pr, Er, and Dy, the glass-ceramic materials may be used to fabricate optical amplifiers and lasers.Type: GrantFiled: April 28, 1995Date of Patent: July 16, 1996Assignee: Corning IncorporatedInventors: Nicholas F. Borrelli, Lauren K. Cornelius, Mark A. Newhouse, Paul A. Tick
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Patent number: 5518968Abstract: A lead-free ceramic glaze comprising, by weight:(i) between about 27 and 35% SiO.sub.2 ;(ii) between about 9 and 15% Al.sub.2 O.sub.3 ;(iii) between about 26 and 34% B.sub.2 O.sub.3 ;(iv) between about 4 and 9% BaO;(v) up to about 2.5% CaO;(vi) between about 3 and 8% SrO;(vii) between about 6 and 12% ZnO;(viii) up to about 1% K.sub.2 O;(ix) between about 1 and 4% Li.sub.2 O;(x) between about 1.5 and 3% Na.sub.2 O; and(xi) balance of minor impurities.Also disclosed are ceramic substrates spray coated with such composition and a method for making a lead-free glaze to a ceramic substrate using lower firing temperatures, on the order of 1550.degree. to 1650.degree. F. (843.degree. to 899.degree. C.).Type: GrantFiled: October 17, 1994Date of Patent: May 21, 1996Assignee: Cooper Industries, Inc.Inventor: Randy O. Knapp
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Patent number: 5491118Abstract: The invention is directed to a lead-free and cadmium-free thick film paste composition suitable for forming resistor or thermistor patterns on a substrate.Type: GrantFiled: December 20, 1994Date of Patent: February 13, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventor: Jacob Hormadaly
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Patent number: 5488019Abstract: A dielectric ceramic composition is disclosed which consists essentially of: a main ceramic composition containing barium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by xBaO.yTiO.sub.2.z[(1-a)RE.sub.2 O.sub.3.aBi.sub.2 O.sub.3 ] where RE represents at least one rare earth metal, 0.10.ltoreq.x.ltoreq.0.20, 0.60.ltoreq.y.ltoreq.0.75, 0.10.ltoreq.z.ltoreq.0.25, x+y+z=1 and 0<a.ltoreq.0.3; and a glass composition composed of ZnO, B.sub.2 O.sub.3 and SiO.sub.2, which is represented by k(wt. %)ZnO.m(wt. %)B.sub.2 0.sub.3.n(wt. %)SiO2 where 30.ltoreq.k.ltoreq.85, 5.ltoreq.m.ltoreq.50, 2.ltoreq.n.ltoreq.40, k+m+n=100. The glass composition is contained in an amount of at least 0.1 part by weight, but not more than (18-62.5a) parts by weight (where 0<a.ltoreq.0.2) or not more than 5.5 parts by weight (where 0.2<a.ltoreq.0.3), per 100 parts by weight of the main ceramic composition.Type: GrantFiled: May 31, 1994Date of Patent: January 30, 1996Assignee: NGK Insulators, Ltd.Inventors: Masahiro Abe, Tsutomu Nanataki, Shinsuke Yano