And Divalent Metal Oxide (e.g., Oxides Of Zinc, Cadmium, Beryllium, Alkaline Earth Metal, Magnesium, Etc.) Patents (Class 501/72)
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Patent number: 5895767Abstract: A crystallized glass and a manufacturing method therefor are disclosed. The crystallized glass comprises .beta.-spodumene solid solution as the predominant crystal phase, and is produced by forming a melted raw glass, cooling and thereafter heat-treating it. The raw glass has a composition comprising, expressed in terms of weight percent: 52-65% SiO.sub.2 ; 8-15% Al.sub.2 O.sub.3 ; 0-4% P.sub.2 O.sub.5, 3-8% TiO.sub.2, and 0-4% ZrO.sub.2, wherein the following inequality is satisfied,0.1<(% of P.sub.2 O.sub.5 +% of ZrO.sub.2)/(% of TiO.sub.2)<0.8; 0-10% ZnO, 0-10% MgO, and 0-5% BaO, wherein the following inequality is satisfied,<(% of ZnO+% of MgO+% of BaO)<15; 3-12% Li.sub.2 O; 0-4% K.sub.2 O; and As.sub.2 O.sub.3 and Sb.sub.2 O.sub.3, wherein the following inequality is satisfied,0<% of As.sub.2 O.sub.3 +% of Sb.sub.2 O.sub.3 <2.Type: GrantFiled: January 2, 1997Date of Patent: April 20, 1999Assignee: Kabushiki Kaisha OharaInventors: Katsuhiko Yamaguchi, Naoyuki Goto
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Patent number: 5891233Abstract: A pharmaceutical preparation, including a glass phase which is bioactive silica containing glass in the form of a paste, suspension or solution mixed in a physiologically suitable liquid or bound to a physiologically suitable vehicle, and which preparation reduces the pulpal irritation or a tooth and/or strengthens the structure of a tooth. Bioactive silica containing glass may be a material which contains only Si-oxide or Si-hydroxide and which allows the formation and movement of Si--OH-groups. Preferably, the preparation also contains calcium and phosphate sources.Type: GrantFiled: April 2, 1997Date of Patent: April 6, 1999Assignee: Bioxid OyInventors: Jukka Salonen, Ulla Tuominen, Antti Yli-Urpo
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Patent number: 5885915Abstract: The subject-matter of the invention is a glass composition, which is suitable for use in electric lamps, comprising SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O, K.sub.2 O, Li.sub.2 O, SrO, B.sub.2 O.sub.3, and optionally CaO, MgO, TiO.sub.2, P.sub.2 O.sub.5, Sb.sub.2 O.sub.3, Fe.sub.2 O.sub.3, MnO.sub.2, ZnO and/or CeO.sub.2. It is characterized in that its SiO.sub.2 content is 65-73 mass %, Al.sub.2 O.sub.3 content is 0.5 to 2.5 mass %, Na.sub.2 O content is 5 to 9 mass %, K.sub.2 O content is 8 to 12 mass %, Li.sub.2 O content is 0.4 to 1.5 mass %, SrO content is 0.5 to 5 mass %, B.sub.2 O.sub.3 content is 2.1 to 5 mass %. Furthermore in addition to the components listed, it optionally also comprises maximum 2.5 mass % CaO, maximum 3.8 mass % MgO, maximum 1 mass % TiO.sub.2, maximum 0.8 mass % P.sub.2 O.sub.5, maximum 0.5 mass % Sb.sub.2 O.sub.3, maximum 0.25 mass % Fe.sub.2 O.sub.3, maximum 0.25 mass % MnO.sub.2, maximum 5 mass % ZnO, and/or maximum 0.8 mass % CeO.sub.Type: GrantFiled: July 24, 1997Date of Patent: March 23, 1999Assignee: General Electric CompanyInventors: Zoltan Laszlo Bako, Zoltan Kamill Suha, Zsuzsanna Klara Varga
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Patent number: 5883029Abstract: The disclosure describes a method for producing bulk, particulate material that includes solid, generally ellipsoidal particles by dispersing irregularly shaped feed particles including about 60 to 100% by weight of at least one silicate-containing material selected from among wollastonite, alkali feldspar, plagioclase feldspar and nepheline. While maintaining the feed particles in dispersion, they are heated sufficiently to bring about at least partial fusion within at least the surfaces of the particles. This produces a bulk particulate product of which about 15 to 100% by volume is generally ellipsoidal particles. Also described are compositions of matter including solid particles, at least a portion of which are substantially glassy and generally ellipsoidal. At least a portion of these particles have been respectively formed from feed particles composed substantially of at least one silicate selected from among wollastonite, alkali feldspar, plagioclase feldspar and nepheline.Type: GrantFiled: May 7, 1997Date of Patent: March 16, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventor: Richard B. Castle
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Patent number: 5883030Abstract: The invention relates to a glass composition for electric lamps comprising 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, CaO and MgO, in addition optionally SrO, Sb.sub.2 O.sub.3, MnO.sub.2, Fe.sub.2 O.sub.3, and/or CeO.sub.2. The glass composition according to the invention is characterized in that its B.sub.2 O.sub.3 content is 1 to 5 mass %, K.sub.2 O content is 7.2 to 11 mass %, BaO content is 5.5 to 9 mass % and MgO content is 2.1 to 4 mass %, furthermore in addition to the components listed, it optionally also comprises maximum 3.5 mass % ZnO, maximum 1.2 mass % TiO.sub.2 and maximum 0.8 mass % P.sub.2 O.sub.5 with the condition that the total amount of CaO, MgO and ZnO in the composition is at least 5.8 mass %. Stems and bulbs made of the above glass composition and used in electric lamps are also subject matters of the invention.Type: GrantFiled: July 24, 1997Date of Patent: March 16, 1999Assignee: General Electric CompanyInventors: Zoltan Laszlo Bako, Zoltan Kamill Suha, Zsuzsanna Klara Varga
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Patent number: 5874109Abstract: Carriers comprising silica-based glass providing for the controlled release of biologically active molecules, their methods of preparation, and methods of use are disclosed. The carriers are prepared using a sol-gel-derived process. Biologically active molecules are incorporated within the matrix of the glass during production.Type: GrantFiled: September 4, 1997Date of Patent: February 23, 1999Assignee: The Trustees of the University of PennsylvaniaInventors: Paul Ducheyne, Shulamith Radin, Erick Manuel Santos
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Patent number: 5871777Abstract: Carriers comprising silica-based glass providing for the controlled release of biologically active molecules, their methods of preparation, and methods of use are disclosed. The carriers are prepared using a sol-gel-derived process. Biologically active molecules are incorporated within the matrix of the glass during production.Type: GrantFiled: May 2, 1997Date of Patent: February 16, 1999Assignee: The Trustees of the University of PennsylvaniaInventors: Paul Ducheyne, Shulamith Radin, Erick Manuel Santos
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Patent number: 5861176Abstract: Carriers comprising silica-based glass providing for the controlled release of biologically active molecules, their methods of preparation, and methods of use are disclosed. The carriers are prepared using a sol-gel-derived process. Biologically active molecules are incorporated within the matrix of the glass during production.Type: GrantFiled: December 24, 1996Date of Patent: January 19, 1999Assignee: The Trustees of the University of PennsylvaniaInventors: Paul Ducheyne, Shulamith Radin, Erick Manuel Santos
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Patent number: 5858897Abstract: A glass composition for a substrate consisting essentially of from 59 to 72 wt % of SiO.sub.2, from 1 to 15 wt % of Al.sub.2 O.sub.3, from 0.5 to 9 wt % of MgO, from 0.5 to 11 wt % of CaO, from 0 to 6 wt % of SrO, from 0 to 5 wt % of BaO, from 4 to 19 wt % of MgO+CaO+SrO+BaO, from 0 to 9 wt % of Na.sub.2 O , from 4 to 21 wt % of K.sub.2 O, from 10 to 22 wt % of Na.sub.2 O+K.sub.2 O, and from 0.5 to 10.5 wt % of ZrO.sub.2, wherein the difference between the SiO.sub.2 content and the Al.sub.2 O.sub.3 content is from 50 to 71 wt %, and the specific gravity of the composition is less than 2.6.Type: GrantFiled: March 13, 1997Date of Patent: January 12, 1999Assignee: Asahi Glass Company Ltd.Inventors: Kei Maeda, Hitoshi Onoda, Yasumasa Nakao, Jeetendra Sehgal
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Patent number: 5851939Abstract: In order to provide an alkali-free glass substrate which contains substantially no alkali metal oxide, which has chemical resistance, a high strain point, excellent meltability, and devitrification resistance, the alkali-free glass substrate contains substantially no alkali metal oxide and essentially consists, by weight, of 58.0-68.0% SiO.sub.2, 10.0-25.0% Al.sub.2 O.sub.3, 3.0-15.0% B.sub.2 O.sub.3, 0-2.9% MgO, 0-8.0% CaO, 0.1-5.0% BaO, 0.1-10.0% SrO, 0-5.0% ZnO, 0-5.0% ZrO.sub.2, and 0-5.0% TiO.sub.2.Type: GrantFiled: May 23, 1997Date of Patent: December 22, 1998Assignee: Nippon Electric Glass Co., Ltd.Inventor: Shinkichi Miwa
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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: 5843853Abstract: The invention pertains to a new lead-free glass composition with improved properties, a glass frit of this composition and its use for the production of glass-enamel, particularly for architectural glass. The glass composition contains in mole %:______________________________________ Na.sub.2 O 10-15 K.sub.2 O 0.1-2 SiO.sub.2 40-50 B.sub.2 O.sub.3 8-12 TiO.sub.2 4-7 Al.sub.2 O.sub.3 0.1-3 ZnO 13-17 F 1-5 ______________________________________and less than 0.5 weight % each of the oxides of the series PbO, CdO, P.sub.2 O.sub.5, and alkaline earth metal oxides. Use of a dye preparation containing the glass frit at 600.degree. to 650.degree. C. results in bakeable glazed, crack-free, acid and base resistant enamel layers.Type: GrantFiled: August 4, 1997Date of Patent: December 1, 1998Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventors: Oliver Heitmann, Gerhard Tunker
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Patent number: 5843854Abstract: A mineral fibre composition which is soluble in biological fluids contains substantially45-65% by weight of SiO.sub.215-40% by weight of CaO0-20% by weight of MgO0-6% by weight of Na.sub.2 O+K.sub.2 Oand in addition aluminium and/or iron oxides as well as phosphorus oxide in such amounts that the weight ratio of P.sub.2 O.sub.5 to the sum of Al.sub.2 O.sub.3 and iron oxide is circa 0.4 to 6.Type: GrantFiled: May 19, 1995Date of Patent: December 1, 1998Assignee: Partek Paroc OY ABInventors: Kirsti Marjatta Karppinen, Michael Stig Folke Perander, Peter Arnold Henrik Solin, Antero Olavi Pehkonen, Seija Marketta Maine
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Patent number: 5830814Abstract: The present invention relates to glass compositions suitable for the manufacture of glazings for use in the architectural field or for fitting in motor vehicles. These compositions contain the following constituents with the contents, express in weight percentages, defined by the following limits:SiO.sub.2 69 to 75%Al.sub.2 O.sub.3 0 to 3%CaO 2 to 10%MgO 0 to 2%Na.sub.2 O 9 to 17%K.sub.2 O 0 to 8%Fe.sub.2 O.sub.3 (total iron) 0.2 to 1.5%These compositions can also contain fluorine, as well as oxides of zinc, zirconium, carium, titanium and less than 4% barium oxide, the sum of the percentages of the alkaline earth oxides remaining equal to or below 10%.Type: GrantFiled: November 5, 1996Date of Patent: November 3, 1998Assignee: Saint-Gobain VitrageInventor: Jean-Marie Combes
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Patent number: 5780373Abstract: A glass composition comprising from 45 to 66 wt % of SiO.sub.2, from 0 to 15 wt % of Al.sub.2 O.sub.3, from 10 to 24 wt % of Li.sub.2 O+Na.sub.2 O+K.sub.2 O, from 14 to 26 wt % of CaO+MgO+SrO+BaO+ZnO, and from 0 to 1 wt % of SO.sub.3 +Sb.sub.2 O.sub.3, said glass composition containing substantially no zirconia and having a strain point of at least 560.degree. C. and a linear thermal expansion coefficient of at least 80.times.10.sup.-7 /.degree.C. within a temperature range of from 50.degree. to 350.degree. C.Type: GrantFiled: December 20, 1996Date of Patent: July 14, 1998Assignee: Asahi Glass Company Ltd.Inventors: Osamu Yanagisawa, Kenji Oda, Naoki Sugimoto, Yoshio Takegawa, Akira Takada, Hideyo Osada, Haruo Aizawa, Koji Miura
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Patent number: 5776844Abstract: This invention concerns a thermally stable glass composition, which comprises the following constituents in the following proportions by weight:______________________________________ SiO.sub.2 45 to 68% Al.sub.2 O.sub.3 0 to 20% ZrO.sub.2 0 to 20% B.sub.2 O.sub.3 0 to 10% Na.sub.2 O 2 to 12% K.sub.2 O 3.5 to 9% CaO 1 to 13% MgO 0 to 8% ______________________________________the sum of the contents of the oxides SiO.sub.2, Al.sub.2 O.sub.3 and ZrO.sub.2 remaining equal to or less than 70%, the sum of the oxides Al.sub.2 O.sub.3 and ZrO.sub.2 being equal to or greater than 2%, the sum of the alkaline oxides Na.sub.2 O and K.sub.2 O being equal to or greater than 8%, said composition comprising, if desired, the oxides BaO and/or SrO in proportions such that:11%.ltoreq.MgO+CaO+BaO+SrO<30%This glass composition may be used for the production of substrates for an emissive screen or for that of a fire-resistant pane.Type: GrantFiled: December 13, 1996Date of Patent: July 7, 1998Assignee: Saint-Gobain VitrageInventors: Stephanie Koch, Didier Jousse, Rene Gy, Gilles Courtemanche
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Patent number: 5762950Abstract: A bioceramic system for delivery of a bioactive compound, which comprises a combination of bioactive glass, bioactive glass ceramic or bioactive ceramic, hydroxyapatite, optionally one or more other calcium phosphate compound and optionally a matrix, and which may incorporate into the bioceramic system a bioactive compound. The timing of the release of the bioactive compound can be regulated as desired and depends on the conditions of the surrounding, the composition of the bioceramic system and its method preparation.Type: GrantFiled: May 10, 1995Date of Patent: June 9, 1998Assignee: Orion-Yhtyma OyInventors: Antti Yli-Urpo, Harry Gosta Jalonen, Kauko Oiva Antero Kurkela
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Patent number: 5747396Abstract: A borosilicate glass composition comprising 55-67 mol % of SiO.sub.2, 3-11 mol % of Al.sub.2 O.sub.3, 16-26 mol % of B.sub.2 O.sub.3, and 3-11 mol % of at least one oxide of SrO, CaO, MgO and ZnO is useful in the preparation of ceramic substrates. Since the amount of orthoboric acid formed on the glass in contact with humid air is minimized, the glass gives rise to little trouble in the manufacture of ceramic substrates. Ceramic compositions using the glass and a filler can be fired at low temperatures into sintered substrates which are characterized by a low dielectric constant, low dielectric dissipation factor, and high flexural strength.Type: GrantFiled: February 12, 1997Date of Patent: May 5, 1998Assignee: TDK CorporationInventors: Toshinobu Miyakoshi, Hiroaki Hasegawa
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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: 5735942Abstract: A novel silica based bioactive glass composition that can be used in conjunction with a delivery agent such as a toothpaste, gel saliva, etc. having a particle size range <90 .mu.m which will form a rapid and continuous reaction with body fluids due to the immediate and long term ionic release of Ca and P from the core silica particles, to produce a stable crystalline hydroxy carbonate apatite layer deposited onto and into the dentin tubules for the immediate and long term reduction of dentin hypersensitivity.Type: GrantFiled: July 16, 1997Date of Patent: April 7, 1998Assignees: USBiomaterials Corporation, University of MarylandInventors: Leonard J. Litkowski, Gary D. Hack, David C. Greenspan
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Patent number: 5721181Abstract: Abrasion resistant glass, which consists essentially of the following components:______________________________________ SiO.sub.2 74 to 85.5 (wt %), B.sub.2 O.sub.3 0.5 to 5 (wt %), SiO.sub.2 + B.sub.2 O.sub.3 76 to 88 (wt %), RO 1 to 9 (wt %), R'.sub.2 O 10 to 23 (wt %), RO + R'.sub.2 O 11 to 24 (wt %), Al.sub.2 O.sub.3 0 to 5 (wt %), RO/R'.sub.2 O (weight ratio) at most 0.6, ______________________________________provided that R is at least one member selected from Mg and Ca, and R' is at least one member selected from Li, Na and K, and of which the density measured at room temperature is at most 2.43 g/cc.Type: GrantFiled: October 10, 1996Date of Patent: February 24, 1998Assignee: Asahi Glass Company Ltd.Inventors: Jeetendra Sehgal, Junichiro Kase, Akira Takada, Hideo Takahashi, Yasumasa Nakao, Seturo Ito
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Patent number: 5713994Abstract: A low-fusing temperature porcelain compositions, methods of use thereof on metal or porcelain substrates to form dental prostheses and kits therefor. Compositions of the invention have a fusing temperature of less than 800.degree. C. and a coefficient of thermal expansion compatible with a substrate of metal or ceramic. Each composition includes, in weight percent of the composition, from 40 to 65 percent by weight SiO.sub.2, from 6 to 12 percent by weight Al.sub.2 O.sub.3, from 6 to 12 percent by weight Na.sub.2 O, from 5.5 to 10.50 percent by weight K.sub.2 O, from 1 to 3 percent by weight Li.sub.2 O, from 0.8 to 2.5 percent by weight CaO, from 0.8 to 4.0 percent by weight B.sub.2 O.sub.3 and from 0.1 to 0.8 percent by weight CeO.sub.2.Type: GrantFiled: June 10, 1996Date of Patent: February 3, 1998Assignee: Ceramco Inc.Inventors: Carolyn M. Kramer, John F. McLaughlin, Robert D. DeLuca, John A. Hornor, Mary J. Daub, Kevin A. Andino
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Patent number: 5707909Abstract: The invention pertains to a new lead-free glass composition with improved properties, a glass frit of this composition and its use for the production of glass-enamel, particularly for architectural glass.The glass composition contains in mole %:______________________________________ Na.sub.2 O 10-15 K.sub.2 O 0.1-2 SiO.sub.2 40-50 B.sub.2 O.sub.3 8-12 TiO.sub.2 4-7 Al.sub.2 O.sub.3 0.1-3 ZnO 13-17 F 1-5 ______________________________________and less than 0.5 weight % each of the oxides of the series PbO, CdO, P.sub.2 O.sub.5, and alkaline earth metal oxides. Use of a dye preparation containing the glass frit at 600.degree. to 650.degree. C. results in bakeable glazed, crack-free, acid and base resistant enamel layers.Type: GrantFiled: February 21, 1996Date of Patent: January 13, 1998Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventors: Oliver Heitmann, Gerhard Tunker
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Patent number: 5691254Abstract: In order to provide an enamel frit composition for a low-expansion crystallized glass, capable of producing an enamel coating excellent in abrasion resistance and acid resistance without occurrence of cracks by using glass powder which does not contain any harmful component such as PbO, and to provide an enamel-coated low-expansion crystallized glass plate using the enamel frit composition, the enamel frit composition for a low-expansion crystallized glass essentially consists 40-98 wt % glass powder, 1-55 wt % coloring pigment, and 0-54 wt % filler. The glass powder consists, by weight, of 55-72% SiO.sub.2, 4-8% Al.sub.2 O.sub.3, 14-22% B.sub.2 O.sub.3, 2-4% BaO, 5.1-15% Na.sub.2 O, 0-2% Li.sub.2 O, 0-2.8% K.sub.2 O, and 0-2% F.sub.2.Type: GrantFiled: November 26, 1996Date of Patent: November 25, 1997Inventors: Akihiko Sakamoto, Kiyoshi Katagi, Masayuki Ninomiya
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Patent number: 5674616Abstract: Glass beads in accordance with the present invention may be constituted of SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O, K.sub.2 O, BaO, SrO, TiO.sub.2, and CeO.sub.2. The glass of which the glass beads is made will generally contain at least 40% SiO.sub.2 as the network former, from about 10 to about 25% Na.sub.2 O and K.sub.2 O as fluxes, from about 5 to about 25% of BaO and/or SrO as a fracture resistance improvement components, a small amount of Al.sub.2 O.sub.3, and--when made from CRT waste--very small amounts of TiO.sub.2 and CeO.sub.2. The glass beads of the invention are suitable for use as reflective elements in roadway markings and as media in shot-peening metal cleaning procedures.Type: GrantFiled: February 6, 1995Date of Patent: October 7, 1997Assignee: Conversion Technologies International, Inc.Inventor: Gerald P. Balcar
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Patent number: 5656560Abstract: The invention relates to a bronze-tinted or grey-tinted soda lime silicate glass, in particular for the manufacture of flat glass by the casting process or by the float process, with a basic composition for the soda lime silicate glass of:______________________________________ SiO.sub.2 : 66-74 weight % Al.sub.2 O.sub.3 : 0-3 weight % TiO.sub.2 : 0-0.15 weight % CaO: 7-12 weight % MgO: 2-6 weight % Na.sub.2 O: 10-15 weight % K.sub.2 O: 0-3 weight % BaO: 0-0.04 weight % SO.sub.3 : 0.1-0.4 weight % ______________________________________The invention resides in the fact that it contains the following colorants additives: ______________________________________ Fe.sub.2 O.sub.3 : 0-0.45 weight % V.sub.2 O.sub.5 : 0.0-0.5 weight % MnO.sub.2 : 0.5-2 weight % NiO: 0.0-0.05 weight % CuO: 0.0-0.1 weight % CoO: 0.0-0.008 weight % ______________________________________the sum of the weight percentages of the constituents forming the soda lime silicate glass being 100.Type: GrantFiled: April 6, 1994Date of Patent: August 12, 1997Assignees: Pilkington plc, Flachglas AGInventors: Eberhard Stotzel, Ferdinand Klosel, Brian Yale
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Patent number: 5641717Abstract: The disclosure describes a method for producing bulk, particulate material that includes solid, generally ellipsoidal particles by dispersing irregularly shaped feed particles including about 60 to 100% by weight of at least one silicate-containing material selected from among wollastonite, alkali feldspar, plagioclase feldspar and nepheline. While maintaining the feed particles in dispersion, they are heated sufficiently to bring about at least partial fusion within at least the surfaces of the particles. This produces a bulk particulate product of which about 15 to 100% by volume is generally ellipsoidal particles. Also described are compositions of matter including solid particles, at least a portion of which are substantially glassy and generally ellipsoidal. At least a portion of these particles have been respectively formed from feed particles composed substantially of at least one silicate selected from among wollastonite, alkali feldspar, plagioclase feldspar and nepheline.Type: GrantFiled: September 21, 1995Date of Patent: June 24, 1997Inventor: Richard B. Castle
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Patent number: 5633090Abstract: An article of manufacture comprising a glass substrate having a thermal expansion of less than 5.0.multidot.10.sup.-6 /K and, coated thereon, a lead- and cadmium-free glaze comprising, in percent by weight, the following components:______________________________________ Li.sub.2 O 0-12 MgO 0-10 CaO 3-18 B.sub.2 O.sub.3 5-25 Al.sub.2 O.sub.3 3-18 Na.sub.2 O 3-18 K.sub.2 O 3-18 BaO 0-12 SiO.sub.2 25-55 TiO.sub.2 0-5 ZrO.sub.2 0-<3 ______________________________________with up to 30% by weight of a pigment stable at the baking temperature.Type: GrantFiled: June 27, 1994Date of Patent: May 27, 1997Assignee: Schott GlaswerkeInventors: Erich Rodek, Werner Kiefer, Friedrich Siebers
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Patent number: 5631195Abstract: A glass composition comprising from 45 to 66 wt % of SiO.sub.2, from 0 to 15 wt % of Al.sub.2 O.sub.3, from 10 to 24 wt % of Li.sub.2 O+Na.sub.2 O+K.sub.2 O, from 14 to 26 wt % of CaO+MgO+SrO+BaO+ZnO, and from 0 to 1 wt % of SO.sub.3 +Sb.sub.2 O.sub.3, said glass composition containing substantially no zirconia and having a strain point of at least 560.degree. C. and a linear thermal expansion coefficient of at least 80.times.10.sup.-7 /.degree.C. within a temperature range of from 50.degree. to 350.degree. C.Type: GrantFiled: September 14, 1995Date of Patent: May 20, 1997Assignee: Asahi Glass Company Ltd.Inventors: Osamu Yanagisawa, Kenji Oda, Naoki Sugimoto, Yoshio Takegawa, Akira Takada, Hideyo Osada, Haruo Aizawa, Koji Miura
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Patent number: 5618763Abstract: Alkali-zinc-silicate glass ceramics and glasses are described which have a linear thermal expansion coefficient in the range from 8.0 to 18.7.times.10.sup.-6 K.sup.-1, an excellent chemical resistance and other advantageous optical properties and can be used in particular as dental material.Type: GrantFiled: July 27, 1995Date of Patent: April 8, 1997Assignee: Ivoclar AGInventors: Martin Frank, Susanne Wegner, Volker Rheinberger, Wolfram Hoeland
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Patent number: 5614449Abstract: A product comprising man made vitreous fibers formed of a composition which comprises, by weight of oxides:______________________________________ SiO.sub.2 45-60% Al.sub.2 O.sub.3 0.5-4.0% TiO.sub.2 0.1-4% FeO 6-12% CaO 10-25% MgO 8-18% Na.sub.2 O 0-2.5% K.sub.2 O 0-2% Na.sub.2 O + K.sub.2 O 0-6% P.sub.2 O.sub.5 3-10% ______________________________________wherein the product has a sintering temperature of at least 950.degree. C. and wherein above 50% by weight of the iron is present as ferrous.Type: GrantFiled: September 28, 1995Date of Patent: March 25, 1997Assignee: Rockwool International A/SInventor: Soren L. Jensen
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Patent number: 5591453Abstract: Carriers comprising silica-based glass providing for the controlled release of biologically active molecules, their methods of preparation, and methods of use are disclosed. The carriers are prepared using a sol-gel-derived process. Biologically active molecules are incorporated within the matrix of the glass during production.Type: GrantFiled: June 7, 1995Date of Patent: January 7, 1997Assignee: The Trustees of the University of PennsylvaniaInventors: Paul Ducheyne, Shulamith Radin, Erick M. Santos
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Patent number: 5559060Abstract: The present invention is directed to glasses exhibiting annealing points between 682.degree.-702.degree. C., linear coefficients of thermal expansion (25.degree.-300.degree. C.) between 57-59.times.10.sup.-7 /.degree. C., and excellent resistance to attack by HCl and Na.sub.2 CO.sub.3 consisting essentially, in weight percent, of______________________________________ SiO.sub.2 56-60 Na.sub.2 O 0-3 Al.sub.2 O.sub.3 12-15 K.sub.2 O 0-3 B.sub.2 O.sub.3 5.5-7 Na.sub.2 O + K.sub.2 O 0.5-3. CaO 19-24.Type: GrantFiled: April 24, 1995Date of Patent: September 24, 1996Assignee: Corning IncorporatedInventors: William H. Dumbaugh, Jr., Suresh T. Gulati, Robert W. Pfitzenmaier
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Patent number: 5558942Abstract: Ultraviolet ray absorbent colored glass for buildings and vehicles, which consists essentially of from 65 to 75 wt % of SiO.sub.2, from 0.1 to 5.0 wt % of Al.sub.2 O.sub.3 , from 10 to 18 wt % of Na.sub.2 O, from 0 to 5 wt % of K.sub.2 O, from 5 to 15 wt % of CaO, from 1 to 6 wt % of MgO, from 0.05 to 1.0 wt % of SO.sub.3, from 0.08 to 0.20 wt % of vanadium as calculated as V.sub.2 O.sub.5, from 0.36 to 0.65 wt % of MnO.sub.2, from 0 to 0.0020 wt % of CoO and from 0.06 to 0.18 wt % of iron as calculated as Fe.sub.2 O.sub.3, wherein from 0 to 10 wt % of the total iron content is FeO.Type: GrantFiled: November 10, 1994Date of Patent: September 24, 1996Assignee: Asahi Glass Company Ltd.Inventors: Mizuki Itoh, Takashi Kijima
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Patent number: 5523265Abstract: Fiberizable glass composition with increased levels of BaO are suitable for insulation. These glasses have physical properties which allow current processes to fabricate them into insulation. The glasses also meet proposed German regulations regarding KI.gtoreq.40.Type: GrantFiled: May 4, 1995Date of Patent: June 4, 1996Assignee: Owens-Corning Fiberglas Technology, Inc.Inventors: Charles F. Rapp, Stephanie M. Mattson
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Patent number: 5506180Abstract: The present invention relates to a thermally stable, chemically resistant glass composition incorporating the following constituents within the ranges given hereinafter as cationic percentages:______________________________________ SiO.sub.2 46 to 56% Al.sub.2 O.sub.3 12 to 17% B.sub.2 O.sub.3 10 to 23% CaO 9 to 15% MgO 0.5 to 4% SrO 2 to 7% BaO 0 to 4% Na.sub.2 O + K.sub.2 O .ltoreq.0.5% TiO.sub.2 0 to 3% ______________________________________The glass composition can be used for producing containers, fire-proof glazings or substrates for the electronics industry.Type: GrantFiled: August 4, 1994Date of Patent: April 9, 1996Assignee: Saint-Gobain Vitrage InternationalInventor: Christine Ponthieu
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Patent number: 5480846Abstract: This invention is directed to a novel borosilicate glass for use in glass hipping consisting essentially of:a) boron oxide,b) silica,c) between about 2 w/o and about 6 w/o K.sub.2 O,d) less than about 1 w/o Na.sub.2 O, ande) between about 3.6 w/o and about 5.4 w/o magnesia.Type: GrantFiled: April 21, 1995Date of Patent: January 2, 1996Assignee: Saint-Gobain/Norton Industrial Ceramics Corp.Inventors: Glenn Sundberg, Russell Yeckley
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Patent number: 5470805Abstract: A novel type of lead-free glass for use in glass components of electric lamps, such as stems (1) for incandescent lamps and fluorescent lamps and lamp envelopes for compact fluorescent lamps. The glass does not contain PbO, F and B.sub.2 O.sub.3. The glass has favorable physical properties as regards meltability, softening, expansion, electric resistance, transparency, strength and chemical resistance.Type: GrantFiled: November 17, 1994Date of Patent: November 28, 1995Assignee: U.S. Philips CorporationInventor: Bartholomeus Filmer
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Patent number: 5468693Abstract: The present invention relates to the production of lead-free glasses exhibiting densities of at least 2.9 g/cm.sup.3 and refractive indices of at least 1.545 which consist essentially, in weight percent, of______________________________________ SiO.sub.2 51-63 Al.sub.2 O.sub.3 0-5 Li.sub.2 O 0-3 ZrO.sub.2 0-6 Na.sub.2 O 0-8 SiO.sub.2 + Al.sub.2 O.sub.3 + 55-66 ZrO.sub.2 K.sub.2 O 0-12 TiO.sub.2 0-3 Li.sub.2 O + Na.sub.2 O + 7-15 CaO 0-5 K.sub.2 O SrO 0-<8 MgO 0-3 BaO >13-21 B.sub.2 O.sub.3 0-3 ZnO 5-15 La.sub.2 O.sub.3 0-8.Type: GrantFiled: November 3, 1994Date of Patent: November 21, 1995Assignee: Corning IncorporatedInventor: Marie J. M. Comte
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Patent number: 5455210Abstract: The invention relates to a porcelain with a transparency and strength properties of a hard porcelain, characterized by a phosphate-containing glass phase as well as the predominance of unreacted quartz grains in the matrix. The invention relates to a porcelain batch composition as well as to a method for the manufacture of the porcelain.Type: GrantFiled: November 24, 1993Date of Patent: October 3, 1995Assignee: Rosenthal AktiengesellschaftInventor: Roswitha Kreiner
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Patent number: 5436206Abstract: This invention is directed to the production of a transparent glass which, in a thickness of 4 mm, exhibits a champagne color as defined by chromaticity coordinates (Illuminant C) within the ranges______________________________________ x 0.3166-0.3281 y 0.3211-0.3305 Y 77-88, ______________________________________said glass consisting essentially, by weight, of 0.05-0.25% iron oxide, expressed in terms of Fe.sub.2 O.sub.3, >25-175 ppm nickel oxide, expressed in terms of NiO, and >10-100 ppm Se in a soda lime silicate base composition.Type: GrantFiled: June 10, 1994Date of Patent: July 25, 1995Assignee: Corning IncorporatedInventor: W. Duane Amundson, Jr.
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Patent number: 5432635Abstract: A nonlinear optical material which exhibits large third order nonlinear optical susceptibilities, and responds to light with wavelengths different from each other for multiple signal processing, and methods of manufacturing the same. This is accomplished by dispersing a high concentration of a metal fine particle and/or a semiconductor fine particle different in absorption wavelength throughout an optically transparent matrix such as a glass, a ceramic or a polymer.Type: GrantFiled: September 23, 1993Date of Patent: July 11, 1995Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Ichiro Tanahashi, Masaru Yoshida, Tsuneo Misuyu
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Patent number: 5429996Abstract: A bone grafting material for use in medicine is glass wool which has the mean diameter of 100 .mu.m or less and whose composition is:SiO.sub.2 40-62% (w/w)Na.sub.2 O 10-32% (w/w)CaO 10-32% (w/w)P.sub.2 O.sub.5 0-12% (w/w)CaF.sub.2 0-12% (w/w)B.sub.2 O.sub.3 0-20% (w/w),When the grafting material is used for treatment of periodontal disease, the grafting material is completely replaced by newly formed bone, whereby dental ankylosis of the grafting material to a tooth root does not occur and the newly formed bone and the tooth root are bound with a tissue like a periodontal membrane.Type: GrantFiled: September 22, 1993Date of Patent: July 4, 1995Assignee: Nikon CorporationInventor: Norio Kaneko
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Patent number: 5426077Abstract: This invention is directed to photochromic glasses which darken to a brown coloration upon exposure to actinic radiation, which glasses have a refractive index of about 1.6, an Abbe number between 42-47, a density less than 2.82 g/cm.sup.3, and are preferably essentially free of TiO.sub.2. The glass compositions consist generally, in weight percent, of:______________________________________ SiO.sub.2 43-52 K.sub.2 O 2-9 Nb.sub.2 O.sub.5 6-16 B.sub.2 O.sub.3 12.5-18 MgO 0-5 Ag 0.100-0.175 Al.sub.2 O.sub.3 0-3 CaO 0-5 Cl 0.140-0.350 ZrO.sub.2 6-14 SrO 0-9 Br 0.093-0.195 Li.sub.2 O 1.5-3.5 BaO 0-9 CuO 0.008-0.030. Na.sub.Type: GrantFiled: August 15, 1994Date of Patent: June 20, 1995Assignee: Corning IncorporatedInventors: Yves Brocheton, Michel Prassas, Daniel Ricoult
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Patent number: 5422755Abstract: A transparent, ultraviolet-absorbing, fixed tint glass that is particularly useful in an ophthalmic lens and has a composition, expressed in weight percent on an oxide basis, consisting essentially of______________________________________ SiO.sub.2 65-75 Al.sub.2 O.sub.3 0-2 Na.sub.2 O 5-11 V.sub.2 O.sub.5 1.5-3.5 K.sub.2 O 5-13 MnO.sub.2 1-4 Na.sub.2 O + K.sub.2 O 14-20.Type: GrantFiled: March 25, 1994Date of Patent: June 6, 1995Assignee: Corning IncorporatedInventor: David W. Morgan
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Patent number: 5407872Abstract: A glass fiber forming composition exhibits a remarkably high dielectric constant .epsilon..sub..GAMMA. as well as superior chemical resistance, yet it is readily spun into glass fibers. The composition is characterized to show a devitrification temperature which is lower than a spinning temperature at which the glass composition exhibits a viscosity of 10.sup.2.5 poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of MgO, CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; and 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5. Alternately, the composition consist essentially of 40 to 65 mol % of SiO.sub.Type: GrantFiled: November 8, 1993Date of Patent: April 18, 1995Assignees: Matsushita Electric Works Ltd., Nippon Electric Glass Co. Ltd.Inventors: Kiyotaka Komori, Seishiro Yamakawa, Shigeru Yamamoto, Jun Naka, Tadashi Kokubo
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Patent number: 5403664Abstract: Marble-like glass ceramic which consists essentially of, by weight percent, 50-75% SiO.sub.2, 1-15% Al.sub.2 O.sub.3, 6-16.5% CaO, 0.1-5% Li.sub.2 O, 0-1.5% B.sub.2 O.sub.3, 10-17.5% CaO+Li.sub.2 O+B.sub.2 O.sub.3, 2.5-12% ZnO, 0-12% BaO, 0.1-15% Na.sub.2 O+K.sub.2 O, and 0-10% coloring agents, said ceramic comprising .beta.-wollastonite precipitated as a major crystal. The coloring agents comprises at least one selected from a group of Fe.sub.2 O.sub.3, NiO, CoO, MnO.sub.2, Cr.sub.2 O.sub.3, and CuO. The marble-like glass ceramic may further comprises at least one of As.sub.2 O.sub.3 and Sb.sub.2 O.sub.3 of up to 1% as refining agents, at least one of up to 1.5% MgO and up to 1.5% SrO so as to improve meltability of the glass, and at least one of up to 1% TiO.sub.2, up to 1% ZrO.sub.2, and up to 1% P.sub.2 O.sub.5 so as to make the glass stable and less devitrifiable.Type: GrantFiled: May 10, 1993Date of Patent: April 4, 1995Assignee: Nippon Electric Glass Co., Ltd.Inventors: Toyohide Kurahashi, Yoshio Hashibe, Masayuki Ninomiya
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Patent number: 5401693Abstract: Described is an inorganic fiber comprising silica dioxide, calcium oxide, and alkali oxide having a free energy of hydration greater than (more positive than) -5.00 kcal/mol, an enthalpy of formation less than (more than negative than) -210.0 kcal/mol, a dissolution rate in simulated extra cellular fluid greater than 750 (calculated as nanograms of fiber/per square centimeter of fiber surface area/per hour) having an average fiber diameter not greater than 4.5 micrometers. Also described is a method of manufacturing the fibers.Type: GrantFiled: September 18, 1992Date of Patent: March 28, 1995Assignee: Schuller International, Inc.Inventors: Jon F. Bauer, Kevin D. Schaal
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Patent number: 5401287Abstract: Material selected from the group consisting essentially of molybdenum, arsenic, antimony, bismuth, copper, silver, potassium dichromate and iron chromite, is added during the manufacture of soda-lime-silica float glass to reduce the occurrences of nickel sulfide stone defects. Material is added in sufficient amounts such that the resulting glass is at least 0.010 wt. % selected material. In a preferred embodiment of the invention, molybdenum is added in the form of sodium molybdate such that the resulting glass is at least 0.015 wt. % molybdenum.Type: GrantFiled: August 19, 1993Date of Patent: March 28, 1995Assignee: PPG Industries, Inc.Inventors: George A. Pecoraro, Amarendra Mishra, Larry J. Shelestak, James V. Jones
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Patent number: RE34912Abstract: A method for improving the characteristics of fused slag material is disclosed. This improved method results in a fused slag having resistance against pulverization at the cooling process for generation of yellowish turbid water due to contact of slag lumps with rain water, this method characterized by forming a slag treatment material by rough crushing a substantially dehydrated heat-treated material containing boron, and adding that slag treatment material to molten slag.Type: GrantFiled: September 21, 1993Date of Patent: April 18, 1995Assignee: Nippon Chemical Industrial Co., Ltd.Inventors: Kozo Sonobe, Takashi Fukuzawa, Kohsuke Takeuchi, Tatushi Tabata, Hiroshi Fukuoka, Kunio Hisamatsu, Makoto Katamura