And Aluminum Or Iron Compound Patents (Class 501/68)
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Patent number: 6429161Abstract: The present invention provides a new and improved porcelain enamel coating composition for use in forming a self-cleanable coating upon aluminized steel. The coating composition comprises a glass component having a composition comprising from about 30% to about 55% SiO2, from about 11% to about 20% TiO2, from about 0% to about 10% B2O3, from about 20% to about 40% alkali metal oxides, less than about 5% rare earth metal oxides, from about 0% to about 10% CaO, from about 0% to about 10% BaO, from about 0% to about 10% MnO, from about 2% to about 12% CuO, from about 0% to about 10% Sb2O3, from about 1.5% to about 10% Fe2O3, from about 0% to about 10% SnO2, from about 0% to about 10% P2O5, less than about 2% MoO3, and less than about 5% V2O5.Type: GrantFiled: August 7, 2000Date of Patent: August 6, 2002Assignee: Ferro France S.A.R.L.Inventors: Thierry Souchard, Alain Aronica
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Publication number: 20020103069Abstract: An article of manufacture that has a component capable of being sealed with a copper aluminosilicate glass. The sealing glass has a coefficient of thermal expansion (CTEs) of in the range between 20-82×10-7/° C., over a range of 25-500° C.) and a softening points in the range of 660-1000° C. The glass has a composition consisting essentially, in terms of weight percent on an oxide basis, of 35-68 SiO2, 3-25 Al2O3, 2-26 B2O3, 0-20 R2O, 0-30 RO, 2-33 CuO, 0-4 F, 0-10 MxOy, where R2O is an alkali oxide selected from the group consisting of Li2O, Na2O, and K2O, and RO is an alkaline earth oxide selected from the group consisting of CaO, MgO, ZnO, SrO, and BaO, and MxOy is a transition metal oxide selected from the group consisting of Co2O3, TiO2, NiO, MnO2, and Fe2O3. The present invention also pertains to a method of sealing the article.Type: ApplicationFiled: February 6, 2002Publication date: August 1, 2002Inventor: Dianna M. Young
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Patent number: 6420288Abstract: A process is described for the preparation of shaped translucent lithium disilicate glass ceramic products which are characterized by high strength and good chemical stability and may be processed by pressing in the plastic state or milling to finished glass ceramic products which may be used in particular as dental restorations.Type: GrantFiled: November 6, 1998Date of Patent: July 16, 2002Assignee: Ivoclar AGInventors: Marcel Schweiger, Sascha Cramer von Clausbruch, Wolfram Höland, Volker Rheinberger
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Patent number: 6410467Abstract: A glass consisting essentially of antimony oxide. An optically active glass consisting essentially of antimony oxide and up to about 4 mole % of an oxide of a rare earth element. A rare earth-doped, antimony oxide-containing glass including 0-99 mole % SiO2, 0-99 mole % GeO2, 0-75 mole % (Al, Ga)2O3, 0.5-99 mole % Sb2O3, and up to about 4 mole % of an oxide of a rare earth element. The oxide of the rare earth element may comprise Er2O3. The glass of the invention further includes fluorine, expressed as a metal fluoride. An optical energy-producing or light-amplifying device, in particular, an optical amplifier, comprising the above-described glass. The optical amplifier can be either a fiber amplifier or a planar amplifier, either of which may have a hybrid composition. Embodiments of the glass of the invention can be formed by conventional glass making techniques, while some of the high content antimony oxide embodiments are formed by splat or roller quenching.Type: GrantFiled: April 8, 1999Date of Patent: June 25, 2002Assignee: Corning IncorporatedInventors: James E. Dickinson, Adam J G Ellison, Alexandre M. Mayolet, Michel Prassas
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Publication number: 20020058117Abstract: The cooking panel is made from an opaque glass-ceramic material uniformly colored throughout and having keatite mixed crystals as the predominant crystalline phase, which is ceramicized with a ceramicizable glass or a transparent glass-ceramic with high quartz mixed crystals as the predominant crystalline phase in a definite color location range according to its later service and wear pattern. The cooking panel makes deposited material, such as dirt and the like, less conspicuous.Type: ApplicationFiled: December 9, 1999Publication date: May 16, 2002Inventors: BERND SCHULTHEIS, WALDEMAR WEINBERG, MONICA COTLEAR DE WITZMANN, ROLAND DUDEK, FRIEDRICH SIEBERS, KLAUS SCHOENBERGER
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Patent number: 6387510Abstract: A glass for a data storage medium substrate, which consists essentially of the following components as represented by mol %: SiO2 60 to 72, Al2O3 2 to 9 MgO 3 to 9, CaO 2 to 10, SrO 0 to 15, ZnO 0 to 4, TiO2 0 to 8, ZrO2 0 to 4, Li2O 1 to 12, Na2O 0 to 8, K2O 0 to 5, Y2O3 0 to 5, La2O3 0 to 5, and Li2O + Na2O + K2O 4 to 15, and which has a Young's modulus of at least 85 GPa.Type: GrantFiled: April 10, 2000Date of Patent: May 14, 2002Assignee: Asahi Glass Company, LimitedInventors: Tetsuya Nakashima, Yasumasa Nakao, Akio Koike
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Patent number: 6383645Abstract: There is provided a glass-ceramic substrate for an information storage medium usable in an information storage device of the ramp loading system. The glass ceramic substrate has a Young's modulus (GPa)/specific gravity of 37 or over and includes 5.3 to 8 weight percent (expressed on an oxide basis) of Al2O3. The glass ceramic substrate has, as its predominant crystal phases, lithium disilicate (Li2O.2SiO2) and &agr;-quartz (&agr;-SiO2), has a coefficient of thermal expansion within a range from 65×10−7/° C. to 130×10−7/° C. within a temperature range from −50° C. to +70° C. and has a surface roughness (Ra) (arithmetic mean roughness) of 9 Å or below.Type: GrantFiled: March 2, 1999Date of Patent: May 7, 2002Assignee: Kabushiki Kaisha OharaInventors: Naoyuki Goto, Junko Ishioka, Yasuyuki Kawashima
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Patent number: 6376084Abstract: A glass-ceramics having a high elastic modulus, processes for producing the same, and an information recording medium substrate effectively inhibited from bending or vibrating are disclosed. The glass-ceramics has a major crystalline phase which has a Mohs' hardness of 6 or higher and is constituted of crystals containing manganese (Mn).Type: GrantFiled: February 25, 2000Date of Patent: April 23, 2002Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Shoichi Kishimoto, Akihiro Koyama, Hiroyuki Tanaka
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Patent number: 6342302Abstract: A ceramic restoration based on a leucitic glass-ceramic, which is characterized in that the glass-ceramic includes by way of components 40-95 wt.-% SiO2 5-25 wt.-% Al2O3 5-25 wt.-% K2O 0-25 wt.-% Na2O 0-20 wt.-% CaO 0-8 wt.-% B2O3 0-0.5 wt.-% P2O5 0-3 wt.-% F, in that it contains, as sole crystalline phase, leucite in a total proportion from 20 to 45 wt.-%, at least 80% of the theoretically producible quantity of leucite being present, and in that it exhibits a linear coefficient of thermal expansion &agr;(20-500° C.) from 12.5·10−6 to 15.5·10−6 K−1. This glass-ceramic is particularly suitable for processing as pressed ceramic and can be advantageously faced with dental ceramic that exhibits a linear coefficient of thermal expansion &agr;(20-500° C.) from 13.5·10−6 to 17.0·10−6 K−1.Type: GrantFiled: November 12, 1999Date of Patent: January 29, 2002Assignee: Degussa AGInventors: Jürgen Steidl, Steffen Assmann
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Patent number: 6342458Abstract: High-strength sinterable lithium disilicate glass ceramics are described which can be further processed in particular by pressing in the viscous state to shaped dental products.Type: GrantFiled: August 23, 1999Date of Patent: January 29, 2002Assignee: Ivoclar AGInventors: Marcel Schweiger, Martin Frank, Volker Rheinberger, Wolfram Hoeland
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Publication number: 20020010063Abstract: A process is described for the preparation of shaped translucent lithium disilicate glass ceramic products which are characterized by high strength and good chemical stability and may be processed by pressing in the plastic state or milling to finished glass ceramic products which may be used in particular as dental restorations.Type: ApplicationFiled: November 6, 1998Publication date: January 24, 2002Inventors: MARCEL SCHWEIGER, SASCHA CRAMER VON CLAUSBRUCH, WOLFRAM HOLAND, VOLKER RHEINBERGER
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Publication number: 20020004353Abstract: A composition for a bulkhead of a thin display panel which is a mixed composition comprising a powder of glass or ceramic for molding a bulkhead of a thin display panel or a part thereof and a binder being an organic additive, wherein the above organic additive contains 15 to 50% by weight of a resin composition which generates heat energy by irradiation with an energy ray and which can be cured by energy coming from an energy ray source or the resulting heat energy. To provide a composition for a bulkhead which is used for molding a bulkhead constituting a discharge display cell of a thin display panel or mending a broken part thereof and which is improved in curability.Type: ApplicationFiled: January 31, 2001Publication date: January 10, 2002Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD. Tokyo, JapanInventor: Noriya Hayashi
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Publication number: 20010056029Abstract: Oxynitride glass whose composition is represented by Al—Si—O—N or M—Al—Si—O—N (where M denotes Ca, Mg, or rare earth element), wherein the content of O and N as non-metallic components is in the range of O eq %<N≦30 eq %, with O+N=100 eq %, the content of M, Al, and Si as metallic components is in the range of 20 eq %≦Al≦30 eq % and 70 eq %≦Si≦80 eq %, respectively, with Al+Si=100 eq % (if M does not exist) and the content of M, Al, and Si as metallic components is within the hatched area in the composition diagrams shown in FIGS. 1 to 3, if M is Ca, Mg, or rare earth metal, or within the hatched area in the composition diagrams shown in FIGS. 4 to 8, if the content of N is in the range of 5 eq %≦N≦25 eq %.Type: ApplicationFiled: September 14, 1999Publication date: December 27, 2001Inventors: MORIYOSHI KANAMARU, TOMOJI TAKAHASHI, KAZUTAKA KUNII, TAKAO KAWANAKA
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Patent number: 6329309Abstract: Oxynitride glass whose composition is represented by Al—Si—O—N or M—Al—Si—O—N (where M denotes Ca, Mg, or rare earth element), wherein the content of O and N as non-metallic components is in the range of 0 eq %<N≦30 eq %, with O+N=100 eq %, the content of M, Al, and Si as metallic components is in the range of 20 eq %≦Al≦30 eq % and 70 eq %≦Si≦80 eq %, respectively, with Al+Si=100 eq % (if M does not exist) and the content of M, Al, and Si as metallic components is within the hatched area in the composition diagrams shown in FIGS. 1 to 3, if M is Ca, Mg, or rare earth metal, or within the hatched area in the composition diagrams shown in FIGS. 4 to 8, if the content of N is in the range of 5 eq %≦N≦25 eq %. This glass is superior in specific rigidity and fabricability. It contains nitrogen in a controlled amount so that it has improved specific rigidity without its specific gravity increasing.Type: GrantFiled: September 14, 1999Date of Patent: December 11, 2001Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Moriyoshi Kanamaru, Tomoji Takahashi, Kazutaka Kunii, Takao Kawanaka
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Patent number: 6316374Abstract: A dielectric ceramic composition which can be sintered at low temperature and has a low dielectric constant, high Q value, and favorable temperature-dependent characteristic of capacitance (TCC) in the high-frequency region, can be used in a ceramic electronic element. The dielectric ceramic composition comprises glass and at least one of an Si—Mg—Al—O ceramic and TiO2. Preferably, the compositional proportions of the three components based on wt. % represented by (glass, Si—Mg—Al—O ceramic, TiO2) fall within a polygon formed by connecting points A(100, 0, 0), B(30, 70, 0), and C(30, 0, 70) in the ternary diagram of the three components.Type: GrantFiled: February 26, 1999Date of Patent: November 13, 2001Assignee: Murata Manufacturing Co., Ltd.Inventor: Hiromichi Kawakami
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Patent number: 6309990Abstract: A low-dielectric-constant glass fiber having a glass composition comprising, by % by weight, 45 to 60% of SiO2, 8 to 20% of Al2O3, 15 to 30% of B2O3, 0 to 5% of MgO, 5%, exclusive of 5%, to 12% of CaO, 0 to 1.0% of Li2O+Na2O+K2O, 0.5 to 5% of TiO2 and 0 to 2% of F2 is suitable for use for reinforcing a high-density printed wiring board required to have a low dielectric tangent and its peripheral members.Type: GrantFiled: April 14, 1999Date of Patent: October 30, 2001Assignees: Nitto Boseki Co., Ltd., Nitto Glass Fiber Mfg. Co., LtdInventors: Shinichi Tamura, Masahiro Mori
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Patent number: 6306785Abstract: A living tissue replacement of crystallized glass having bioaffinity and mechanical strength is briefly obtained simply by pressure molding or machining without using a special equipment. A glass material having a softening point below its crystallization temperature and exhibiting viscous flow at temperatures below its melting point is heated at a temperature above its Tg and pressed at the temperature to mold to a desired shape, thereby manufacturing a living tissue replacement such as a dental crown. Molding can be done under a pressure of up to 20 MPa.Type: GrantFiled: March 10, 1999Date of Patent: October 23, 2001Assignee: TDK CorporationInventors: Toru Nonami, Tatsuji Sano, Sadami Tsutsumi, Tetsuo Urabe, Masahiro Fukuma
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Patent number: 6306784Abstract: Alkali silicate glasses are described which, in view of their good chemical stability and their optical properties and processing properties, are particularly suitable as a coating or veneering material for ceramic dental frameworks and hence for the production of all-ceramic dental restorations such as crowns or bridges.Type: GrantFiled: June 9, 2000Date of Patent: October 23, 2001Assignee: Ivoclar AGInventors: Helga Drescher, Martin Frank, Volker Rheinberger, Wolfram Höland
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Publication number: 20010022705Abstract: A polished glass disk medium substrate table for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. Glass forming raw materials are formed into a disk having a diameter between about 70 mm and about mm, a thickness between about 0.7 mm and about 0.9 mm, a flutter of less than 90 nm at 10,000 rpm.Type: ApplicationFiled: March 15, 2001Publication date: September 20, 2001Inventors: Toshiharu Mori, Hideki Kawai, Akira Sugimoto, Hiroshi Yuki, Hideki Nagata, Kazuhiko Ishimaru
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Patent number: 6284686Abstract: A lead and arsenic free borosilicate glass is provided which is suitable for use in electric arc discharge lamps. The glass is tungsten-sealing and provides desirable protection from ultraviolet radiation. In addition, the glass is suitable for use in glass melters not equipped with bubblers.Type: GrantFiled: December 22, 1999Date of Patent: September 4, 2001Assignee: Osram Sylvania Inc.Inventor: Richard C. Marlor
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Patent number: 6277777Abstract: Novel boron-free glass compositions are described which are particularly suited for making fine diameter glass fibers for HEPA electronic clean-room filtration media using flame-attenuation or rotary glass processing.Type: GrantFiled: August 3, 1999Date of Patent: August 21, 2001Assignee: Johns Manville International, Inc.Inventors: Xiaojie Xu, Foster Laverne Harding, Jon Frederick Bauer
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Patent number: 6255238Abstract: The object of the present invention is brown solar glasses, absorbing UV or IR radiation, as well as solar ophthalmic lenses in said glasses. Said glasses have the following composition, expressed in percentages by weight: SiO2: 64-71; B2O3: 2-8; Al2O3: 0-4; ZrO2: 0-2; Li2O: 0-4; Na2O: 6-10; K2O: 7-16; CaO: 0-5.5; ZnO: 0-5.5; TiO2; 0-2; Fe2O3: 3-9; Co3O4: 0-0.030; NiO: 0-0.2; SeO2: 0.0030-0.1; As2O3: 0-0.1; Sb2O3: 0-0.1; SnO2: 0-0.1; Cl: 0-2; Br: 0-2; F: 0-2.Type: GrantFiled: February 7, 2000Date of Patent: July 3, 2001Assignee: Corning S.A.Inventor: Yves A. H. Brocheton
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Publication number: 20010003725Abstract: The lead-free optical light flint glass material has a refractive index nd between 1.54 and 1.61 and an Abbe number &ngr;d of between 38 and 45. It has a composition, based on oxide content, of SiO2 from 52 to 62% by weight, Al2O3 from 3 to 8% by weight, Na2O from 7 to 14% by weight, K2O from 8 to 14% by weight, TiO2 from 13 to 18% by weight, ZrO2 from 0 to 5% by weight, with at least one refining agent, if needed, in an amount suitable for the purposes of refining; and with the proviso that a sum total of Na2O and K2O present is greater than 18% by weight.Type: ApplicationFiled: November 29, 2000Publication date: June 14, 2001Inventors: Silke Wolff, Peter Brix, Ute Woelfel
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Patent number: 6206958Abstract: Porcelain compositions of the present invention comprises particulate of one or more glass or glass-ceramic powder components. Additionally, one or more opacifing agents, pigments, fluorescing agents and the like may be included in the composition. Based on volume percent, the particulate has a d10 of from about 1.1 and about 1.8 microns; a d50 of from about 3 to about 6 microns; a d90 of from about 8 to about 16 microns; and about 1.0 to about 4.0% by volume of the particulate has a particle size greater than or equal to about 20 microns. The mean particle size is preferably in the range of about 3.0 microns to about 7.5 microns.Type: GrantFiled: July 15, 1999Date of Patent: March 27, 2001Assignee: Jeneric/Pentron, IncorporatedInventors: Paul Panzera, Jana N. Pruden, Dmitri Brodkin, Lisa M. Kaiser, Richard A. Brightly, Carlino Panzera
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Patent number: 6187701Abstract: Provided is a porcelain which is suitable as a dental porcelain capable of being fired on a ceramics core and has a low firing temperature and a low thermal expansion coefficient and which is excellent in a chemical durability. The above dental porcelain comprises glass containing silicon oxide, aluminum oxide, boron oxide, zinc oxide, sodium oxide and lithium oxide as principal components. The contents of these respective components in the above glass are 57 to 65% by weight of SiO2, 8 to 18% by weight of Al2O3, 15 to 25% by weight of B2O3, 0.1 to 2% by weight of ZnO, 3 to 7% by weight of Na2O and 2 to 8% by weight of Li2O respectively in terms of a percent by weight based on the total of the respective components when the respective components are reduced to SiO2, Al2O3, B2O3, ZnO, Na2O and Li2O respectively. The particularly preferred dental porcelain comprises glass having a thermal expansion coefficient of 6.0×10−6 (1/°C.) or less as a principal structural component.Type: GrantFiled: May 28, 1999Date of Patent: February 13, 2001Assignee: Tokuyama CorporationInventors: Masato Sekino, Hiroyuki Nakagawa, Osamu Iwamoto, Masaaki Ushioda
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Patent number: 6177169Abstract: A glass including SiO2, Na2O, MgO, Al2O3 and cobalt oxide, wherein the cobalt oxide is 4.5-85 wt % as an oxide of CoO or 4.9-91 wt % as an oxide of Co3O4.Type: GrantFiled: November 3, 1999Date of Patent: January 23, 2001Assignee: Hitachi, Ltd.Inventors: Hiroki Yamamoto, Takashi Naito, Takashi Namekawa, Yasutaka Suzuki, Ken Takahashi, Motoyasu Terao, Toshimichi Shintani
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Patent number: 6162750Abstract: A plasma display unit comprises a pair of substrate glasses, discharge electrodes formed on inner surfaces of the substrate glasses, and a fluorescent member disposed between the substrate glasses for emitting light in response to the discharge of the electrode. Each substrate glass used in the plasma display unit essentially consists by weight of 50-65% SiO.sub.2, 2-15% Al.sub.2 O.sub.3, 0-4% MgO, 0-2.9% CaO, 2-13% SrO, 0.5-13% BaO, 10-27% MgO+CaO+SrO+BaO, 0-1% Li.sub.2 O, 2-10% Na.sub.2 O, 2-13% K.sub.2 O, 7-15% Li.sub.2 +Na.sub.2 O+K.sub.2 O, 1-9% ZrO.sub.2, 0-5% TiO.sub.2, 0-1% Sb.sub.2 O.sub.3, and 0-1% As.sub.2 O.sub.3. The substrate glass exhibits small thermal contraction even if subjected to heat treatment at a temperature of 570.degree. C. or more, has a coefficient of thermal expansion of 75-95.times.10.sup.-7 /.degree. C., and is high in volume resistivity and excellent in chemical durability as compared with a soda lime glass.Type: GrantFiled: March 4, 1998Date of Patent: December 19, 2000Assignee: Nippon Electric Glass Co., Ltd.Inventors: Yoshiharu Miwa, Junzo Wakaki, Kazuhiko Asahi
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Patent number: 6132843Abstract: A glass substrate for a magnetic disk of the present invention is one in which a laser beam is irradiated on a main surface thereby forming a large number of protrusions thereon to form texture thereon, each of said protrusions being formed by a protruded portion having a convex shape, said glass having a composition in which 0.2 to 3 wt % of an oxide of a transition metal is contained and an absorption coefficient with respect to a wavelength of a light at 266 nm being within a range of 0.03 to 2 .mu.m.sup.-1, and by setting the absorption coefficient of the glass with respect to a wavelength of a light at 266 nm within a range of 0.03 to 2 .mu.m.sup.-1 and irradiating a laser beam having a wavelength in a range of ultraviolet rays selectively on the main surface of a glass substrate at predetermined intervals, texture comprising a large number of protrusions formed by protruded portions each having a small diameter and a convex shape is formed.Type: GrantFiled: November 13, 1997Date of Patent: October 17, 2000Assignee: Nippon Sheet Glass Do., Ltd.Inventors: Yasunao Kuroda, Yoshihiro Matsuno, Shinya Katayama, Akihiro Koyama, Jyunji Kurachi
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Patent number: 6121175Abstract: Alkali silicate glasses are described which, in view of their good chemical stability and their optical properties and processing properties, are particularly suitable as a coating or veneering material for ceramic dental frameworks and hence for the production of all-ceramic dental restorations such as crowns or bridges.Type: GrantFiled: June 12, 1998Date of Patent: September 19, 2000Assignee: Ivoclar AGInventors: Helga Drescher, Frank Martin, Volker Rheinberger, Wolfram Holand
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Patent number: 6087282Abstract: Porcelain compositions of the present invention possess non-greening properties and comprise one or more glass or glass-ceramic components. Additionally, an oxygen release agent is included in the compositions. The porcelain compositions may vary depending upon the specific thermal properties desired.The application temperature of the porcelain compositions ranges from about 600.degree. C. to about 930.degree. C. depending upon the method of application of the porcelain. The coefficient of thermal expansion is preferably in the range of about 11.times.10.sup.-6 /.degree. C. to about 16.times.10.sup.-6 /.degree. C. The porcelain is compatible with cores and/or substrates having coefficients of thermal expansion in the range of about 11 to about 20.times.10.sup.-6 /.degree. C.Type: GrantFiled: July 10, 1998Date of Patent: July 11, 2000Assignee: Jeneric/Pentron IncorporatedInventors: Carlino Panzera, Dmitri Brodkin, Paul Panzera
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Patent number: 6077799Abstract: These glasses incorporate a combination of F and Al.sub.2 O.sub.3 to achieve even wider fluorescence and improved gain flatness. In addition, SPCVD incorporates large amounts of N into low-loss fiber whose high charge has an impact on rare earth behavior. The Surface Plasma Chemical Vapor Deposition (SPCVD) produces fiber preforms with high levels of F, Al.sub.2 O.sub.3, and N. These heavily fluorinated glasses provide much broader Er.sup.3+ emission than Type I or Type II silica for enhanced multichannel amplifiers. SPCVD successfully fluorinates silica with losses below 5 dB/km and increased Er.sup.3+ emission width.Type: GrantFiled: March 12, 1999Date of Patent: June 20, 2000Assignee: Corning Inc.Inventors: Matthew J. Dejneka, Rostislav Khrapko
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Patent number: 6071615Abstract: A process is proposed for producing a protective layer on workpieces made, for example, from carbon composite material, for use at temperatures above 1000.degree. C. In accordance with the invention, a comminuted solids mixture with refractory ceramic powder articles, e.g., of carbides, nitrides and/or silicides, preferably from groups III, IV and/or VIb of the periodic table, and with at least one compound of the general elemental composition Me.sub.x B.sub.z, where Me represents one of the elements Si, Al, Zr, Ti, Hf or Y, and x and z each represent a number from 1 to 6, and optionally, in addition, with at least one already formed glass with the following general oxidic composition: Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 --SiO.sub.2 --RO, where RO represents MgO, CaO or BaO, is dispersed in a liquid carrier system, deposited on free surfaces of a workpiece, and heated together with the workpiece briefly with air access to a maximum temperature of 1200.degree. C.Type: GrantFiled: April 18, 1997Date of Patent: June 6, 2000Assignee: MAN Technologie AktiengesellschaftInventors: Gerhard Solow, Udo Wendt, Ingo Hager, Fred Gustav Wihsmann
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Patent number: 6060412Abstract: In order to provide a crystallized glass which can be shaped by the redraw forming and a method of manufacturing a crystallized glass article by the redraw forming, the crystallized glass contains precipitated crystals with a maximum grain size not greater than 5 .mu.m and a glass phase at a ratio of 10 to 85 vol %, and has a softening point lower than a melting point of a predominant precipitated crystal, and a property such that crystallization does not progress even when heated at a temperature higher than the softening point. In order to manufacture the crystallized glass article formed by the redrawing, the above-described crystallized glass is preformed and then subjected to the drawing while being heated to a temperature higher than the softening point.Type: GrantFiled: March 20, 1998Date of Patent: May 9, 2000Assignee: Nippon Electric Glass Co., Ltd.Inventor: Yuji Ishida
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Patent number: 6048812Abstract: The invention relates to brown glasses which absorb ultraviolet radiation that are used in the production of ophthalmic sun glasses, and that have the following composition, expressed in wt. %:______________________________________ SiO.sub.2 59-78 Al.sub.2 O.sub.3 2-6 B.sub.2 O.sub.3 0-3 Na.sub.2 O 7-16 K.sub.2 O 2-9 CaO 0-7 BaO 0-12 ZnO 0-12 ZrO.sub.2 0-6 TiO.sub.2 0-6 MnO.sub.2 0.25-6 V.sub.2 O.sub.5 1-3 Fe.sub.2 O.sub.3 0-1.5 NiO 0-0.5 CoO 0-0.1 Sb.sub.2 O.sub.3 0-0.7 As.sub.2 O.sub.3 0-0.7 F 0.05-1.0 With MnO.sub.2 + Fe.sub.2 O.sub.3 + V.sub.2 O.sub.5 >1.5 Al.sub.2 O.sub.3 + SiO.sub.2 .gtoreq.65.Type: GrantFiled: April 14, 1998Date of Patent: April 11, 2000Assignee: Corning IncorporatedInventors: Yves A. H. Brocheton, Marie J. M. Comte
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Patent number: 6022819Abstract: Porcelain compositions of the present invention comprise one or more glass or glass-ceramic powder components. Additionally, one or more opacifying agents, pigments, fluorescing agents and the like may be included in the composition. Based on volume percent, 10% of the particulate in the porcelain has a particle size of less than between about 1.1 microns and about 1.5 microns, 50% of the particulate in the porcelain has a particle size of less than between about 3 and about 6 microns, 90% of the particulate in the porcelain has a particle size of less than between about 8 and about 13.5 microns, and the maximum particle size of the particulate is greater than about 20 microns and less than about 60 microns. The mean particle size is preferably in the range of about 3.0 microns to about 6.5 microns.Type: GrantFiled: July 17, 1998Date of Patent: February 8, 2000Assignee: Jeneric/Pentron IncorporatedInventors: Paul Panzera, Jana Pruden, Dmitri Brodkin, Lisa M. Kaiser, Richard A. Brightly, Carlino Panzera
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Patent number: 5994248Abstract: The invention relates to lenses such as aspherical lenses and to a process for their manufacture. According to the invention, the lens is composed of a glass matrix including the constituents below in the following weight proportions:______________________________________ SiO.sub.2 65-85% Al.sub.2 O.sub.3 0-10% B.sub.2 O.sub.3 0-20% Li.sub.2 O + Na.sub.2 O + K.sub.2 O 3-20% CaO + MgO + BaO 1-15% FeO + Fe.sub.2 O.sub.3 0-0.1%, ______________________________________wherein the K.sub.2 O content is equal to or less than 1% and the BaO content is equal to or less than 1%.Type: GrantFiled: November 6, 1997Date of Patent: November 30, 1999Assignee: Saint-Gobain VitrageInventors: Jose Francisco Gandarillas-Lastra, Benoit Trouille
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Patent number: 5977001Abstract: The invention relates to a glass composition for electric lamps which glass composition comprises SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O, K.sub.2 O, Li.sub.2 O, B.sub.2 O.sub.3, BaO and SrO and optionally CaO, MgO, ZnO, P.sub.2 O.sub.5, Sb.sub.2 O.sub.3, TiO.sub.2, MnO.sub.2, Fe.sub.2 O.sub.3 and/or CeO.sub.2. The composition according to the invention has a B.sub.2 O.sub.3 content of 1 to 2.8 mass %, a SrO content of 2.1 to 4.5 mass %, a BaO content of 3 to 6 mass % and of the components being present optionally, the amount of CaO is maximum 1 mass %, that of MgO is maximum 2.4 mass % and that of ZnO is maximum 3 mass %, on the condition that the total amount of SrO and B.sub.2 O.sub.3 is at least 3.6 mass %, the total amount of CaO and MgO is maximum 2.4 mass % and the total amount of MgO and ZnO is maximum 4.5 mass %.Type: GrantFiled: December 1, 1997Date of Patent: November 2, 1999Assignee: General Electric CompanyInventors: Zoltan Kamill Suha, Zsuzsanna Klara Varga, Zoltan Laszlo Bako
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Patent number: 5910707Abstract: A glass halogen lamp which exhibits improved short wavelength light transmission and emission having a glass envelope which is made of a glass composition of the aluminosilicate system in which the iron content of the composition is between 10 and 100 ppm. The glass envelope of the lamp may optionally contain an area of reduced wall thickness which further enhances short wavelength light transmission and emission.Type: GrantFiled: June 25, 1997Date of Patent: June 8, 1999Assignee: Welch Allyn, Inc.Inventor: Dean A. Bell
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Patent number: 5902665Abstract: A glass substrate for a magnetic disk of the present invention is one in which a laser beam is irradiated on a magnetic recording surface side thereby forming a large number of protrusions thereon to form texture thereon, each of the protrusions having a convex shape, an optical absorption coefficient of a glass with respect to a wavelength of a laser beam at 266 nm being within a range of 20 to 2000 mm.sup.-1, the glass having a composition by weight of:silicon oxide (SiO.sub.2): 58 to 66%,aluminum oxide (Al.sub.2 O.sub.3): 13 to 19%,lithium oxide (Li.sub.2 O): 3 to 4.5%,sodium oxide (Na.sub.2 O): 6 to 13%,potassium oxide (K.sub.2 O); 0 to 5%,R.sub.2 O: 9 to 18% (provided R.sub.2 O=Li.sub.2 O+NaO+K.sub.2 O),magnesium oxide (MgO): 0 to 3.5%,calcium oxide (CaO): 1 to 7%;strontium oxide (SrO): 0 to 2%;barium oxide (BaO): 0 to 2%,RO: 2 to 10% (provided RO=MgO+CaO+SrO+BaO), andiron oxide (Fe.sub.2 O.sub.3): 0.05 to 2%,titanium oxide (TiO.sub.2): 0 to 2%,cerium oxide(CeO.sub.Type: GrantFiled: August 29, 1997Date of Patent: May 11, 1999Assignee: Onda TechnoInventor: Yasunao Kuroda
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Patent number: 5900296Abstract: A glass substrate for magnetic disks, obtained by chemical strengthening treatment of a glass consisting essentially of from 50 to 65 wt % of SiO.sub.2, from 5 to 15 wt % of Al.sub.2 O.sub.3, from 2 to 7 wt % of Na.sub.2 O, from 4 to 9 wt % of K.sub.2 O, from 7 to 14 wt % of Na.sub.2 O+K.sub.2 O, from 12 to 25 wt % of MgO+CaO+SrO+BaO, and from 1 to 6 wt % of ZrO.sub.2.Type: GrantFiled: April 18, 1996Date of Patent: May 4, 1999Assignee: AG Technology Co., Ltd.Inventors: Ichiro Hayashi, Kei Maeda, Kazuo Mannami
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Patent number: 5897956Abstract: Glass having low solar radiation and ultraviolet ray transmittance, which consists essentially of a soda lime-silica type matrix glass containing from 0.53 to 0.70 wt % of total iron calculated as Fe.sub.2 O.sub.3, from 0.2 to 0.4 wt % of TiO.sub.2 and from 0.5 to 0.8 wt % of total cerium calculated as CeO.sub.2, wherein the weight of FeO calculated as Fe.sub.2 O.sub.3 is from 30 to 40% of the weight of the total iron calculated as Fe.sub.2 O.sub.3.Type: GrantFiled: April 21, 1997Date of Patent: April 27, 1999Assignee: Asahi Glass Company Ltd.Inventors: Takashi Kijima, Toru Kudo, Mizuki Ito, Fumio Kamei, Akira Kondo
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Patent number: 5888264Abstract: A method of preparing a ferrous iron-containing glass composition is provided. The method comprises melting a batch of glass-forming components including an iron source and refining the resultant melt. The iron source comprises a fayalite-containing material. Glass can be produced having an increased ferrous content and an associated higher level of solar heat absorption with improved visible light transmission as a result of lower iron (III) content.Type: GrantFiled: October 14, 1997Date of Patent: March 30, 1999Assignee: Pilkington plcInventors: Clive Francis Dickinson, Glen Stuart Martin
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Patent number: 5869548Abstract: A dental material comprising a porous ceramics formed into an artificial tooth, an inlay, an onlay, a crown, a crown bridge or into a block shape suitable for CAD/CAM, sintered, having communicating holes, and impregnated with a resin. A porous ceramics formed from a network-forming oxide is applicable, and an intermediate oxide and a network-modifying oxide may also be adopted. The porous ceramics should preferably have a porosity within a range of from 0.5 to 70%. The resin should preferably a polymer of a monomer and/or oligomer containing at least an ethylenic double bond. Prior to impregnation of the porous ceramics with the resin, the porous ceramics should preferably be subjected to a coupling treatment.Type: GrantFiled: April 28, 1997Date of Patent: February 9, 1999Assignee: GC Dental Products CorporationInventors: Keisuke Ikushima, Akira Hasegawa
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Patent number: 5854151Abstract: The present invention provides a glass body with distributed composition which contains, for example, a rare-earth element having a concentration distribution, which can be produced in high yield while inhibiting cracking at the time of vitrification and which has optical properties advantageous in correcting chromatic aberration in image pickup systems. For example, in a four-component glass composed of SiO.sub.2, Al.sub.2 O.sub.3, Y.sub.2 O.sub.3 and ZrO.sub.2 in which Y.sub.2 O.sub.3 has a recessed parabolic concentration distribution profile being high at the periphery of the glass and low at the center of the glass and in which each of ZrO.sub.2 and Al.sub.2 O.sub.3 has a protrudent parabolic concentration distribution profile lowering from the center of the glass toward the periphery of the glass, there is the relationship:(.DELTA.C.sub.Al /.DELTA.C.sub.Ml)/C.sub.Si =0.0334wherein .DELTA.C.sub.Ml is a concentration distribution difference of Y.sub.2 O.sub.3, .DELTA.C.sub.Type: GrantFiled: July 2, 1997Date of Patent: December 29, 1998Assignee: Olympus Optical Company Ltd.Inventor: Morinao Fukuoka
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Patent number: 5849068Abstract: A shaped, high-strength dental ceramic prosthesis is made by pressing a molding composition including from about 1 to 50 percent by weight glass particles and from about 99 to about 50 percent by weight inorganic oxide particles at a pressure of from about 10 to about 40 MPa and a temperature of from about 1000.degree. to about 1200.degree. C. Dental prostheses prepared in accordance with the invention include crowns, bridges, inlays and onlays.Type: GrantFiled: May 1, 1997Date of Patent: December 15, 1998Assignee: Dentsply G.m.b.H.Inventors: Carmen Hofmann, geb. Roth, Ludwig J. Gauckler, Gerhard Bayer, Martin E. Hofmann, Atef Malash, Peter Scharer, Heinz Luthy, Klaus Krumbholz, Wigbert Hauner, Hansjorg Janssen, Ralf Janda
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Patent number: 5843855Abstract: The invention is a glass for electric lamps comprising SiO.sub.2, A1.sub.2 O.sub.3, Na.sub.2 O, K.sub.2 O, Li.sub.2 O, BaO, MgO, CaO, ZnO, B.sub.2 O.sub.3, TiO.sub.2, SbO.sub.3, MnO.sub.2 and one or more of the following Fe.sub.2 O.sub.3, As.sub.2 O.sub.3 and CeO.sub.2, whereZnO is 3 to 7 weight %,B.sub.2 O.sub.3 is 3 to 8 weight %,TiO.sub.2 is 0 to 1.5 weight %,Al.sub.2 O.sub.3 is 0.3 to 2.5 weight %,BaO is 1 to 4.5 weight %,CaO is 2 to 4.5 weight %,MgO is 0.5 to 3.7 weight %, andthe sum of ZnO and B.sub.2 O.sub.3 is equal to at least 8.6 weight % to provide stability of the glass.Type: GrantFiled: January 15, 1997Date of Patent: December 1, 1998Assignee: General Electric CompanyInventors: Zoltan Suha, Zsuzsanna Varga
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Patent number: 5843856Abstract: The invention relates to a glass composition for electric lamps which glass composition comprises SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O, K.sub.2 O and B.sub.2 O.sub.3 as well as optionally Li.sub.2 O, CaO, MgO, SrO, Sb.sub.2 O.sub.3, Fe.sub.2 O.sub.3, MnO.sub.2 and/or CeO.sub.2. The composition according to the invention is characterized in that it, in addition to the components listed, comprises ZnO and optionally TiO.sub.2 and/or P.sub.2 O.sub.5 as well, its Al.sub.2 O.sub.3 content is 0.3 to 2 mass %, ZnO content is 2.5 to 8 mass %, B.sub.2 O.sub.3 content is 1.5 to 7.5 mass % and the total amount of Al.sub.2 O.sub.3 and TiO.sub.2 is at least 1 mass %, while the total amount of MgO and ZnO is equal to or greater than the amount of B.sub.2 O.sub.3. The invention also relates to stems and bulbs made of the glass composition according to the invention.Type: GrantFiled: January 15, 1997Date of Patent: December 1, 1998Assignee: General Electric CompanyInventors: Zoltan Suha, Zsuzsanna Varga
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Patent number: 5747398Abstract: A solar heat reducing and ultraviolet absorbing soda-lime-silica glass of a neutral tint and high visible light transmittance. The glass has the essential colorants of from about 0.1 to about 0.7 weight percent Fe.sub.2 O.sub.3 (total iron), and either from about 0.1 to about 1.0 weight percent of a compound selected from the group consisting of titanium dioxide, vanadium pentoxide, and ceric oxide, or alternatively from about 0.1 to about 2.0 weight percent of a combination of colorants selected from the group, and having a ferrous value of less than 35 percent.Type: GrantFiled: November 5, 1996Date of Patent: May 5, 1998Assignee: Libbey-Owens-Ford Co.Inventors: Paige L. Higby, Dean E. Vernacotola, Bret E. Penrod
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Patent number: 5728471Abstract: Grey soda-lime glass is composed of main glass-forming constituents together with iron, selenium, cobalt and chromium as colouring agents in the following quantities:______________________________________ Fe.sub.2 O.sub.3 0.5 to 0.9% Co 0.012 to 0.025% Se 0.0025 to 0.010% Cr.sub.2 O.sub.3 0.005 to 0.020%. ______________________________________The proportions of colouring agents are such that the glass has a light transmission factor (TL) of less than 30% and an excitation purity (P) of less than 12%. The dark grey glass is especially appropriate for installation in the sunroofs of cars.Type: GrantFiled: September 13, 1996Date of Patent: March 17, 1998Assignee: GlaverbelInventors: Camille Dupont, Daniel D'Hont
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Patent number: 5723390Abstract: Glass having low solar radiation and ultraviolet ray transmittance, which consists essentially of a soda lime-silica type matrix glass containing from 0.53 to 0.70 wt % of total iron calculated as Fe.sub.2 O.sub.3, from 0.2 to 0.4 wt % of TiO.sub.2 and from 0.5 to 0.8 wt % of total cerium calculated as CeO.sub.2, wherein the weight of FeO calculated as Fe.sub.2 O.sub.3 is from 30 to 40% of the weight of the total iron calculated as Fe.sub.2 O.sub.3.Type: GrantFiled: February 12, 1996Date of Patent: March 3, 1998Assignee: Asahi Glass Company Ltd.Inventors: Takashi Kijima, Toru Kudo, Mizuki Ito, Fumio Kamei, Akira Kondo