And Boron Patents (Class 501/65)
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Patent number: 5807611Abstract: The present invention relates to a ceramic coating composition comprising a preceramic material such as silicon oxide precursors, silicon carbonitride precursors, silicon carbide precursors, and silicon nitride precursors and a flux material such as B.sub.2 O.sub.3, PbO.sub.2, P.sub.2 O.sub.5, and Bi.sub.2 O.sub.3. The present invention also relates to a substrate such as an electronic device having said coating applied and ceramified thereon.Type: GrantFiled: October 4, 1996Date of Patent: September 15, 1998Assignee: Dow Corning CorporationInventors: Clayton R. Bearinger, Robert Charles Camilletti, Loren Andrew Haluska, Keith Winton Michael
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Patent number: 5766741Abstract: An insulating paste comprises a glass component composed of SiO.sub.2, B.sub.2 O.sub.3 and K.sub.2 O as xSiO.sub.2 --yB.sub.2 O.sub.3 --zK.sub.2 O, where x, y and z (% by weight) fall within the area surrounded by points A (x=65, y=35, z=0), B (x=65, y=20, z=15), C (x=85, y=0, z=15) and D (x=85, y=15, z=0), and an organic vehicle. The insulating layer made of the paste has a low dielectric constant and excellent insulating properties.Type: GrantFiled: April 4, 1996Date of Patent: June 16, 1998Assignee: Murata Manufacturing Co., Ltd.Inventors: Hiromichi Kawakami, Hiroji Tani
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Patent number: 5747395Abstract: A glass composition which is essentially free of lead and cadmium includes 30 to 70 wt % SiO.sub.2, 1 to 25 wt % B.sub.2 O.sub.3, 0 to 10 wt % Al.sub.2 O.sub.3, 0 to 5 wt % Bi.sub.2 O.sub.3, 0.1 to 30 wt % CoO, 0.1 to 20 wt % ZnO, 1 to 30 wt % total of at least one of Li.sub.2 O, Na.sub.2 O or K.sub.2 O, up to 10 wt % ZrO.sub.2 and other optional ingredients. The glass composition can be used as a blue colored on-glaze enamel which relies upon the presence of Co.sup.2+ in a network-forming position in the glass to produce the blue color, with oxygen donors such as ZnO.sub.2, alkaline earth oxides and alkali oxides increasing the amount of cobalt occupying network-forming positions, and ZrO.sub.2 to provide chemical durability.Type: GrantFiled: May 8, 1996Date of Patent: May 5, 1998Assignee: Cookson Matthey Ceramics & Materials LimitedInventors: Peter John Smith, Harbans Kaur Mangat
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Patent number: 5744409Abstract: An optical glass containing, as glass components,30.about.55 wt % of SiO.sub.2,5.about.30 wt % of B.sub.2 O.sub.3,the total amount of SiO.sub.2 and B.sub.2 O.sub.3 being 56.about.70 wt % and the SiO.sub.2 /B.sub.2 O.sub.3 weight ratio being 1.3.about.12.0,7.about.12 wt % of Li.sub.2 O, in which 7 wt % is excluded,0.about.5 wt % of Na.sub.2 O,0.about.5 wt % of K.sub.2 O,the total amount of Li.sub.2 O, Na.sub.2 O and K.sub.2 O being 7 to 12 wt % in which 7 wt % is excluded,10.about.30 wt % of BaO,0.about.10 wt % of MgO,0.about.20 wt % of CaO,0.about.20 wt % of SrO, and0.about.20 wt % of ZnOthe total amount of BaO, MgO, CaO, SrO and ZnO being 10.about.30 wt %, and the total amount of SiO.sub.2, B.sub.2 O.sub.3, Li.sub.2 O and BaO being at least 72 wt %.Type: GrantFiled: January 3, 1997Date of Patent: April 28, 1998Assignee: Hoya CorporationInventors: Kazuaki Hashimoto, Koichi Sato
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Patent number: 5741746Abstract: An aluminosilicate glass having a composition comprising, as calculated in weight percent on an oxide basis, of 40-57% SiO.sub.2, 2.0-11% Al.sub.2 O.sub.3, 1-16% CaO, 8-21.5% SrO, 14-31.5% BaO, 0-3% MgO, and 0-4% B.sub.2 O.sub.3, the glass having a temperature not over 1450.degree. C. at a viscosity of 20 MPa.multidot.s (200 poises), a CTE of 60-90.times.10.sup.-7 /.degree. C. and a strain point over 630.degree. C.Type: GrantFiled: February 14, 1996Date of Patent: April 21, 1998Inventors: Jeffrey T. Kohli, Dawne M. Moffatt
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Patent number: 5729381Abstract: This invention is directed to the production of cuprous halide- or a cuprous-cadmium halide-containing glass articles which are essentially completely opaque to ultraviolet radiation and can be essentially completely opaque to radiation within the region of wavelengths of up to 550 nm, but are transparent to visible radiations having a wavelength longer than the radiation within the region of opacity. The method involves exposing the glass articles to a hydrogen gas-containing atmosphere at a temperature between about 375.degree.-500.degree. C. for a period of at least 18 hours to develop an integral reduced layer in at least one surface of the article having a depth effective to prevent the transmission of ultraviolet radiation and radiation having a wavelength up to 550 nm through the article.Type: GrantFiled: November 13, 1995Date of Patent: March 17, 1998Assignee: Corning IncorporatedInventors: Thomas G. Havens, David J. Kerko, JoAnn Morrell
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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: 5710082Abstract: Disclosed herein is a glass composition having a dielectric constant for high-frequency circuits which comprises SiO.sub.2 and at least one of B.sub.2 O.sub.3 or K.sub.2 O in a ratio falling within the region enclosed by lines passing through point A (65, 35, 0), point B (65, 20, 15), point C (85, 0, 15), and point D (85, 15, 0) in a composition diagram for the ternary system of SiO.sub.2, B.sub.2 O.sub.3 and K.sub.2 O. The glass composition may have incorporated with a small amount of clarifying so as to lower the melting temperature and glass softening point. As an insulating material, it is particularly suitable for high-frequency circuits in compact and fast electronic machines and equipment.Type: GrantFiled: September 20, 1996Date of Patent: January 20, 1998Assignee: Murata Manufacturing Co., Ltd.Inventors: Hiromichi Kawakami, Hiroji Tani
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Patent number: 5710081Abstract: Using conventional glass frits for the production of black glass coating compositions makes it necessary also to use a relatively large quantity of black pigments. The quantity of pigment used may be reduced by using black glass frits according to the invention, thin layers of which already have a low transmission.The glass frit according to the invention is black and contains in the glass composition (in mol. %): 10-17% of K.sub.2 O, 10-25% of B.sub.2 O.sub.3, 15-30% of TiO.sub.2, 30 to 55% of SiO.sub.2, 0-5% of Al.sub.2 O.sub.3, 0-5% of Bi.sub.2 O.sub.3, 0.05-3% of Fe.sub.2 O.sub.3 (total iron) and 0.1-3% of sulphur (total sulphur).Type: GrantFiled: February 12, 1997Date of Patent: January 20, 1998Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventor: Gerhard Tunker
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Patent number: 5702996Abstract: Disclosed herein is a glass composition for insulation which comprises SiO.sub.2 and at least one of B.sub.2 O.sub.3 or K.sub.2 O in a ratio falling within the region enclosed by lines passing through point A (65, 35, 0), point B (65, 20, 15), point C (85, 0, 15) and point D (85, 15, 0) on a composition diagram for the ternary system of SiO.sub.2, B.sub.2 O.sub.3 and K.sub.2 O. The glass composition can additionally contain at least one member selected from the group consisting of Al.sub.2 O.sub.3, La.sub.2 O.sub.3, CaO, Ta.sub.2 O.sub.5 and Nd.sub.2 O.sub.3 in an amount less than 25 parts by weight for 100 parts by weight of the major constituents.Type: GrantFiled: September 27, 1996Date of Patent: December 30, 1997Assignee: Murata Mfg. Co., Ltd.Inventors: Hiromichi Kawakami, Hiroji Tani
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Patent number: 5656559Abstract: A composition for soda-lime-silica glass intended for the production of panes, which comprises, in percentages by weight:______________________________________ SiO.sub.2 69 to 75% Al.sub.2 O.sub.3 0 to 3% B.sub.2 O.sub.3 0.5% CaO 2 to 10% MgO < to 2% Na.sub.2 O 9 to 17% K.sub.2 O 0 to 8% Se 0 to 0.002% CoO 0 to 0.001% Cr.sub.2 O.sub.3 0 to 0.001% with 0.02% < Fe.sub.2 O.sub.3 (total) < 0.2%. ______________________________________This composition may further comprise fluorine, oxides of zinc and zirconium and less than 4% of barium oxide, the total of the percentages of the alkaline earth oxides remaining equal to or less than 10%. The panes made from such glasses are particularly well adapted for architectural applications.Type: GrantFiled: June 23, 1995Date of Patent: August 12, 1997Assignee: Saint-Gobain VitrageInventors: Jean-Marie Combes, Dominique Sachot
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Patent number: 5643489Abstract: The present invention relates to a manufacturing method of a far infrared ray emitting material having a wavelength of predetermined frequency band and a far infrared ray emitting product using the same, the manufacturing method including steps of: having a mixing vessel containing a predetermined quantity of materials agitated for 0.5-1 hour by a stirrer having a rotative speed of 33 revolution per minute and mixied; and the materials being thrown into a glass dissolving furnace of 1,350-1,550 degrees celsius and fused for 19-21 hours, whereby the predetermined quantity of materials is constituted by silicon oxide of 45-65 weight %, felspar oxide of 7-9 weight %, borax of 10-20 weight %, boric acid of 4-6 weight %, potassium carbonate of 2-4 weight %, nite of 1.0-1.2 weight %, aluminum hydroxide of 3.3-6.8 weight %, limestone of 1.4-1.8 weight %, barium carbonate of 0.8-1.0 weight %, lithium of 0.7-0.8 weight %, zircon of 1.0-1.3 weight %, phosphoric acid of 0.2-0.4 weight %, carbon of 3.0-3.Type: GrantFiled: May 31, 1995Date of Patent: July 1, 1997Inventor: Sung-Jun Jong
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Patent number: 5641347Abstract: Disclosed is a barium-free glass of good x-ray absorption, which has a composition (in wt.-% on the oxide basis) of SiO.sub.2 50-75; ZrO.sub.2 5-30; Li.sub.2 O 0-5; Na.sub.2 O 0-25; K.sub.2 O 0-25; .SIGMA. alkali oxides 0-25. Preferred is a dental glass of the composition of SiO.sub.2 55-70; ZrO.sub.2 10-25; Li.sub.2 O 0-15; Na.sub.2 O 10-25; K.sub.2 O 0-15; .SIGMA. alkaloids 15-25. The glass can furthermore contain also up to 3 wt.-% of fluorine, up to 5 wt.-% of MgO, up to 5 wt.-% of TiO.sub.2, and in each case up to 10 wt.-% of the oxides Al.sub.2 O.sub.3, GeO.sub.2, P.sub.2 O.sub.5, La.sub.2 O.sub.3, Y.sub.2 O.sub.3, Ta.sub.2 O.sub.3, Gd.sub.2 O.sub.3, ZnO and Nb.sub.2 O.sub.5. The glass finds its use in powder form with an average particle size of .ltoreq.10 .mu.m as filler for dental composites for filling teeth.Type: GrantFiled: November 2, 1995Date of Patent: June 24, 1997Assignee: Schott GlaswerkeInventors: Danuta Grabowski, Marc Clement, Johann Daimer, Hartmut Paschke
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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: 5627115Abstract: The invention relates to brownish, brown to black colored borosilicate glasses which have stepped grades of transmission in the NIR range or are fully non-transmitting. The borosilicate glass, primarily the borosilicate glass 3.3, is melted with defined additives of titanium carbide and/or metallic silicon. The glasses produced in accordance with the invention are to be used as filters, glass vessels and/or decorative colored glass in construction and for decorating because of their absorption/transmission characteristics. On the other hand, the glasses produced in accordance with the invention can also be used as absorbers in solar technology when the light transmissibility in the NIR/IR range is sufficiently low.Type: GrantFiled: August 7, 1995Date of Patent: May 6, 1997Assignee: JENAer Glaswerk GmbHInventors: Eckhart Watzke, Andrea Kampfer, Thomas Kloss, Gerhard Kemmler
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Patent number: 5616525Abstract: Irregularly shaped glass fibers and insulation therefrom comprise two different glasses having differing coefficients of thermal expansion. The irregularly shaped dual-glass fibers are made from wool glass compositions with the addition of at least one of BaO, SrO, K.sub.2 O, Li.sub.2 O, ZnO, TiO.sub.2 and Fe.sub.2 O.sub.3.Type: GrantFiled: April 29, 1996Date of Patent: April 1, 1997Assignee: Owens-Corning Fiberglas Technology, Inc.Inventors: Charles F. Rapp, Russell M. Potter
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Patent number: 5612262Abstract: The invention relates to gray, bluish, blue to black colored borosilicate glasses which have a stepped transmission grade in the near infrared range or are fully non-transmitting. The borosilicate glass with defined additions of titanium dioxide is melted together with a reduction agent such as Si(metallic). The glasses produced in accordance with the invention are used as filters because of their absorption/transmission characteristic or, if the light transmissibility in the near infrared/infrared ranges is sufficiently low, the glasses can also be used as absorbers in solar technology, as a glass used in areas of the home and/or as decorative colored glass in construction and for decorating.Type: GrantFiled: August 7, 1995Date of Patent: March 18, 1997Assignee: JENAer GLASWERK GmbHInventors: Thomas Kloss, Eckhart Watzke
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Patent number: 5541142Abstract: A non-photochromic colored glass containing crystals of precipitated cuprous oxide in a matrix of glass, the matrix glass consisting essentially of, in cation percent, 35-75% SiO.sub.2, 15-45% B.sub.2 O.sub.3, 0-12% Al.sub.2 O.sub.3, the Al.sub.2 O.sub.3 being less than 10% when the SiO.sub.2 is over 55%, 0-5% ZrO.sub.2, 0-12% Li.sub.2 O, 0-20% Na.sub.2 O, 0-12% K.sub.2 O, the sum Li.sub.2 O+Na.sub.2 O+K.sub.2 O being 5-20%, 0-5% CaO+BaO+SrO, 0.4-1.75% Cu.sub.2 O, 0-2% As.sub.2 O.sub.3, 0-2% Sb.sub.2 O.sub.3, 0-1% SnO.sub.2, the sum As.sub.2 O.sub.3 +Sb.sub.2 O.sub.3 +SnO.sub.2 being 0.5-2%, characterized by 0.075.ltoreq.R-value .ltoreq.0.Type: GrantFiled: July 31, 1995Date of Patent: July 30, 1996Assignee: Corning IncorporatedInventor: Roger J. Araujo
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Patent number: 5534470Abstract: This invention is directed to the production of thermally crystallizable glasses which, upon heat treatment in contact with alumina particulates, will form a strong glass-ceramic-bonded composite body, the excellent bonding being attributed to the presence of lithium aluminoborate crystals. The glass-ceramic composition consists essentially, in weight percent, of______________________________________ SiO.sub.2 25-55 MgO 0-12 B.sub.2 O.sub.3 35-65 Li.sub.2 O + MgO 4-16. Li.sub.Type: GrantFiled: October 27, 1994Date of Patent: July 9, 1996Assignee: Corning IncorporatedInventors: Ronald l. Andrus, John F. MacDowell
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Patent number: 5523264Abstract: Fiberizable glass composition with increased levels of B.sub.2 O.sub.3 and Na.sub.2 O are suitable for insulation. Coupled with alumina levels as high as possible, these glasses have improved durability. Moreover, these glasses have physical properties which allow current processes to fabricate them into insulation. The glasses also meet proposed German regulations regarding Kl.gtoreq.40.Type: GrantFiled: March 31, 1995Date of Patent: June 4, 1996Assignee: Owens-Corning Fiberglas Technology, Inc.Inventor: Stephanie M. Mattson
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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: 5512521Abstract: A borosilicate glass composition suitable for porcelain enamel applications is disclosed. Accordingly, a black, cobalt-free composition which contains a significant amount of iron oxide was found to be suitable for enameling cast iron and non-pickled steel substrates. The inventive glass is suitable for applications requiring black color, acid resistance, thermal durability and water vapor resistance. In particular, the inventive glass can be used both as a ground coat and a cover coat.Type: GrantFiled: March 9, 1995Date of Patent: April 30, 1996Assignee: Bayer CorporationInventors: Dechun Fu, Vernon J. Grebe
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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: 5472918Abstract: An optical glass including as its main ingredients in weight percent 25-50% SiO.sub.2, 16-40% B.sub.2 O.sub.3, 5-25% SrO and 1-10% Li.sub.2 O has optical constants of refractive index (Nd) of 1.55-1.65 and Abbe number (.nu.d) of 55-63 and a yield point (At) below 600.degree. C. which is suited for mold pressing.Type: GrantFiled: October 28, 1994Date of Patent: December 5, 1995Assignee: Kabushiki Kaisha OharaInventor: Masahiro Onozawa
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Patent number: 5438024Abstract: A transparent, fixed tint glass lens is provided having a thickness of between about 1.0 mm and about 1.8 mm and which is derived from an alkali silicate composition containing, in terms of weight percent on an oxide basis, at least 6.2% iron oxides, at least 0.03% cobalt oxide and at least 0.12% nickel oxide in the presence of an oxidizing agent such as arsenic oxide. Preferably, the lenses have a transmittance of not more than 1% of ultraviolet radiation at 380 nm.Type: GrantFiled: August 2, 1994Date of Patent: August 1, 1995Assignee: Bausch & Lomb IncorporatedInventors: James R. Bolton, J. Raymond Hensler
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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: 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: 5403789Abstract: A transparent glass which, at a thickness of 2 mm, transmits less than 1% of ultraviolet radiation having a wavelength of 380 nm and exhibits a brown fixed tint bounded by apices A, B, D, F, A of the drawing, a purity between 48-70%, and a dominant wavelength between 580-588 nm, said glass having a composition consisting essentially, expressed in terms of weight percent on the oxide basis, of______________________________________ SiO.sub.2 65-72 CaO 0-5.5 B.sub.2 O.sub.3 3-8 ZnO 0-4 Na.sub.2 O 6-10 CaO + ZnO 2-5.5 K.sub.2 O 7-12 Fe.sub.2 O.sub.3 3-5 Na.sub.2 O + K.sub.2 O 15-20 Se 0.01-2 Al.sub.2 O.sub.3 0-4 NiO 0-0.12.Type: GrantFiled: February 28, 1994Date of Patent: April 4, 1995Assignee: Corning IncorporatedInventors: David J. Kerko, Wagner R. Lozano, David W. Morgan
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Patent number: 5401284Abstract: The present invention provides a vitreous-bonded abrasive grinding wheel wherein the abrasive grit portion comprises a sol-gel alumina abrasive and wherein the wheel has improved corner or form holding characteristics and mechanical properties. The invention further includes the bond composition which allows for improved corner or form holding and mechanical properties with sol-gel alumina abrasives.Type: GrantFiled: July 30, 1993Date of Patent: March 28, 1995Inventors: David A. Sheldon, Robert S. Lundberg, Xiaoming Li
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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: 5382552Abstract: The present invention relates to a rare earth-containing, alkali silicate frit which may be applied to a metal substrate to provide a porcelain enamel coating which has good thermal stability, an acid resistance of A on the PEI scale and improved cleanability, wherein the frit contains, based on the total weight of the frit:______________________________________ Oxide Wt. % ______________________________________ R.sub.2 O 10-30 MgO 0-5 B.sub.2 O.sub.3 0-5 SiO.sub.2 45-60 TiO.sub.2 0-10 F 0.5-5 CoO 0-3 NiO 0-5 X 12-30 ______________________________________whereinR represents an alkali metal andX represents a rare earth oxide having an atomic number of 57-60, preferably cerium oxide.The present invention is also directed to porcelain enamel coatings, especially for appliances, prepared from this rare earth-containing, alkali silicate frit.Type: GrantFiled: September 14, 1993Date of Patent: January 17, 1995Assignees: Miles Inc., Whirlpool CorporationInventors: Elie E. Saad, Stuart W. Ries
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Patent number: 5376597Abstract: A glass composition is disclosed wherein the density and the refraction index and the dispersion value of light are equal to or higher than those of conventional lead-containing crystal glass while no lead is contained therein at all. The glass composition comprises 50 to 60% by weight of SiO.sub.2, 5 to 13% by weight of K.sub.2 O, 5 to 8% by weight of TiO.sub.2, 10 to 15% by weight of BaO, 5 to 10% by weight of ZnO, 3 to 10% by weight of Na.sub.2 O, 1 to 5% by weight of CaO, and 0.3 to 0.8% by weight of Sb.sub.2 O.sub.3.Type: GrantFiled: October 20, 1993Date of Patent: December 27, 1994Assignee: Toyo Glass Company LimitedInventors: Haruhiko Ogata, Hidetoshi Komiya, Shizue Inaba
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Patent number: 5366940Abstract: A transparent, fixed tint glass lens is provided having a thickness of between about 1.0 mm and about 1.8 mm and which is derived from an alkali silicate composition containing, in terms of weight percent on an oxide basis, at least 6.2% iron oxides, at least 0.03% cobalt oxide and at least 0.12% nickel oxide in the presence of an oxidizing agent such as arsenic oxide. Preferably, the lenses have a transmittance of not more than 1% of ultraviolet radiation at 380 nm.Type: GrantFiled: January 28, 1994Date of Patent: November 22, 1994Assignee: Bausch & Lomb IncorporatedInventors: Bolton James R., J. Raymond Hensler
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Patent number: 5342810Abstract: Zinc-containing, lead- and cadmium-free glass frits with a softening point of less than 510.degree. C. are disclosed. Obligatory components of the glass-frit composition are 31-50 mole % ZnO, 10-44 mole % SiO.sub.2, 11-35 mole % B.sub.2 O.sub.3 and 11-25 mole % Na.sub.2 O. The glass frits can be used as base frit for the production of decorative coating masses which can be stoved below 630.degree. C., preferably masses for the decorating of glass.Type: GrantFiled: March 1, 1993Date of Patent: August 30, 1994Assignee: Degussa AktiengesellschaftInventors: Bernard Merigaud, Michel Claus
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Patent number: 5342674Abstract: A ceramic composition comprising 55-70 vol % of a borosilicate glass consisting of 65-88 wt % of SiO.sub.2, 5-25 wt % of B.sub.2 O.sub.3, 1-5 wt % of one or more of Li.sub.2 O, K.sub.2 O and Na.sub.2 O, and 0-5 wt % of Al.sub.2 O.sub.3, 5-30 vol % of alumina as filler, 5-35 vol % of cordierite and 0-20 vol % of quartz glass is provided for a ceramic circuit board for an electronic device such as an electronic computer.Type: GrantFiled: March 9, 1993Date of Patent: August 30, 1994Assignee: Hitachi, Ltd.Inventors: Hirayoshi Tanei, Shoichi Iwanaga
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Patent number: 5322819Abstract: A non-photochromic R.sub.2 O-B.sub.2 O.sub.3 -SiO.sub.2 glass containing a cuprous or cuprous-cadmium halide crystal phase, having a sharp spectral cutoff at about 400 nm, the glass composition consisting essentially of, in cation percent, 35-73% SiO.sub.2, 15-45% B.sub.2 O.sub.3, 0-12% Al.sub.2 O.sub.3, the Al.sub.2 O.sub.3 being less than 10% when the SiO.sub.2 is over 55%, 0-12% Li.sub.2 O, 0-20% Na.sub.2 O, 0-12% K.sub.2 O, the Li.sub.2 O+Na.sub.2 O+K.sub.2 O being 4.75-20%, 0-5% CaO+BaO+SrO, 0.125-1.0% Cu.sub.2 O, 0-1% CdO, 0-5% ZrO.sub.2, 0-0.75% SnO.sub.2, 0-1% As.sub.2 O.sub.3 and/or Sb.sub.2 O.sub.3, the glass containing 0-1.75%. Cl, 0-1.0% Br, 0.25-2.0% Cl+Br and 0-2% F by weight, and having an R-value, calculated in mole percent of 0.15-0.45, the R-value not exceeding 0.30, except as the glass composition meets at least one condition selected from the group: up to 12 cation % Li.sub.2 O, less than 10 cation % Al.sub.2 O.sub.3, at least 0.3 cation % Cu.sub.2 O and 0.50-2.0% Cl+Br.Type: GrantFiled: October 12, 1993Date of Patent: June 21, 1994Assignee: Corning IncorporatedInventors: Roger J. Araujo, David W. Morgan
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Patent number: 5312784Abstract: A ceramic composition for forming ceramic dielectric body having a dielectric constant of less than about 5.5 and a TCE of less than about 5.0 ppm/.degree.C. The composition comprises a mixture of finely divided particles of 10-90 vol. % borosilicate glass and 10-90 vol. % of a material selected from the group consisting of Ga.sub.2 O.sub.3, Ga.sub.2 SiO.sub.5, Ga.sub.2 TiO.sub.5, GaAs, GaPO.sub.4 and any gallium-contained compounds to inhibit the formation of crystalline forms of silica. The composition can be used with a polymeric binder to produce an unfired green tape which is co-fireable with high conductivity metallurgies such as gold, silver and silver/palladium.Type: GrantFiled: August 7, 1992Date of Patent: May 17, 1994Assignee: Aluminum Company of AmericaInventors: Jau-Ho Jean, Tapan K. Gupta
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Patent number: 5308803Abstract: A glass composition which is essentially free from lead and cadium comprises, in mole percent, SiO.sub.2 :35 to 75%, Bi.sub.2 O3:0.1 to 15%, Al.sub.2 O.sub.3 :0.1 to 10%, B.sub.2 O.sub.3 :1 to 30%, at least one of Li.sub.2 O, Na.sub.2 O, K.sub.2 O:5 to 30%, ZrO.sub.2 :0.1 to 10%, and certain other optional ingredients, with the proviso that BaO and ZnO are not contained in an amount of more than 2 mole percent. These glass compositions can be used as fluxes for mixing with pigments to provide compositions for the decoration of ceramic materials and/or glass.Type: GrantFiled: June 10, 1992Date of Patent: May 3, 1994Assignee: Cookson Group PLCInventors: John F. Clifford, Ivan Wozniak, Peter J. Smith
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Patent number: 5300129Abstract: The invention is directed to cubic boron nitride (CBN) particles coated with a thin inner layer formed by the reaction of a reactive glass or ceramic to form a chemical bond and, optionally, an outer layer of a vitreous material. The particles are useful as abrasive particles in a vitreous bonding matrix. In addition, a method of preparing the particles and abrasive tools containing the particles are encompassed.Type: GrantFiled: January 19, 1993Date of Patent: April 5, 1994Assignee: General Electric CompanyInventor: Thomas J. Clark
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Patent number: 5294573Abstract: The present invention relates to a process for making glass by a sol-gel process. The process is initiated by forming a mixture of silicon alkoxide and an alcohol in a solution sufficiently acidic to partially hydrolyze the silicon alkoxide. An index modifying metal alkoxide selected from the group consisting of alkoxides of titanium and zirconium is then added to the mixture. Water is next added to convert the metal alkoxides to a network of corresponding metal oxides suitable for gelation. The mixture containing the network of metal oxides is then contained for sufficient time to form a gel. The gel is acid leached for enough time to remove some of the index modifying metal oxide. To prevent further removal of index modifying metal oxide from the gel, the gel is fixed. The fixed gel is then rinsed with a solvent to remove precipitates from the gel, dried, and sintered into a transparent gradient-index glass.Type: GrantFiled: June 25, 1993Date of Patent: March 15, 1994Assignee: University of RochesterInventor: Niels Haun
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Patent number: 5292690Abstract: A glass composition for glass bubbles used as reinforcing fillers in plastic resin articles has an improved compressive strength and the reduced alkali amount leached from the glass. The glass composition consists essentially of, by weight percentages, SiO.sub.2 40-59%, R.sub.2 O 2-17%, R.sub.2 O being at least one selected from Li.sub.2 O, Na.sub.2 O, and K.sub.2 O, B.sub.2 O.sub.3 1-25%, RO 5-25%, RO being at least one selected from CaO, MgO, BaO, ZnO, and SrO, RO.sub.2 6-40%, RO.sub.2 being at least one selected from TiO.sub.2 and ZrO.sub.2, Al.sub.2 O.sub.3 0-13%, P.sub.2 O.sub.5 0-3%, and SO.sub.3 0.1-1.0%.Type: GrantFiled: March 26, 1992Date of Patent: March 8, 1994Assignee: Nippon Electric Glass Company, Ltd.Inventors: Shinji Kawachi, Yoshifumi Sato
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Patent number: 5288668Abstract: This invention is directed to the production of borosilicate glasses displaying a pink coloration and a chromaticity at a thickness of 4 mm with Illuminant C within the ranges of:x=0.3115-0.4200y=0.3170-0.3600Y=15-92%The glasses consist essentially, expressed in terms of weight percent on the oxide basis, of______________________________________ SiO.sub.2 65-85 B.sub.2 O.sub.3 <20 Na.sub.2 O 0-8 K.sub.2 O 0-8 Na.sub.2 O + K.sub.2 O 2-8 Al.sub.2 O.sub.3 1-6 MnO.sub.2 0.05-1.Type: GrantFiled: August 9, 1993Date of Patent: February 22, 1994Assignee: Corning IncorporatedInventor: Paul L. Netter
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Patent number: 5281562Abstract: A non-photochromic R.sub.2 O--B.sub.2 O.sub.3 --SiO.sub.2 glass containing a cuprous or cuprous-cadmium halide crystal phase, having a sharp spectral cutoff at about 400 nm, the glass composition consisting essentially of, in cation percent, 35-73% SiO.sub.2, 15-45% B.sub.2 O.sub.3, 0-12% Al.sub.2 O.sub.3, the Al.sub.2 O.sub.3 being less than 10% when the SiO.sub.2 is over 55%, 0-12% Li.sub.2 O, O-20% Na.sub.2 O, 0-12% K.sub.2 O, the Li.sub.2 O+Na.sub.2 O+K.sub.2 O being 4.75-20%, 0-5% CaO+BaO+SrO, 0.125-1.0% Cu.sub.2 O, 0-1% CdO, 0-5% ZrO.sub.2, 0-0.75% SnO.sub.2, 0-1% As.sub.2 O.sub.3 and/or Sb.sub.2 O.sub.3, the glass containing 0-1.75% Cl, 0-1.0% Br, 0.25-2.0% Cl+Br and 0-2% F by weight, and having an R-value, calculated in mole percent of 0.15-0.45, the R-value not exceeding 0.30, except as the glass composition meets at least one condition selected from the group: up to 12 cation % Li.sub.2 O, less than 10 cation % Al.sub.2 O.sub.3, at least 0.3 cation % Cu.sub.2 O and 0.50-2.0% Cl+Br.Type: GrantFiled: November 25, 1992Date of Patent: January 25, 1994Assignee: Corning IncorporatedInventors: Roger J. Araujo, David W. Morgan
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Patent number: 5270269Abstract: This invention relates to fine glass crystal prepared from lead-free glass compositions. The glasses consist essentially, in weight percent, of______________________________________ SiO.sub.2 54-64 BaO 8-13 Li.sub.2 O 0-3 SrO 8-13 Na.sub.2 O 0-6.5 ZnO 5.5-9 K.sub.2 O 0-7 BaO + SrO + ZnO 22-33 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 8-15 ______________________________________wherein at least two of Li.sub.2 O, Na.sub.2 O, and K.sub.2 O are present and are present in essentially equimolar ratios.Type: GrantFiled: June 8, 1992Date of Patent: December 14, 1993Assignee: Corning IncorporatedInventors: George B. Hares, Roger A. Miller, Lisa A. Tietz
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Patent number: 5265327Abstract: A process for fabricating microchannel plates produces large area microchannel plates that have channel exit openings as small as 0.5 micron, MTF .about.1, pitch-limited resolution (a factor of 10 potential improvement in resolution) and at a cost of $0.40/sq. centimeter, and with funneling controlled as to configuration and exit opening size and shape. Microchannels may be rectangular in cross section, or rectangular, or trapezoidal, or other configuration, including straight sided, chevron or balloon sided. Microchannels of differing configurations may be interspersed, for reasons of alignment or to control pixel characteristics. Material choice may include glass, ceramic, metal, alloy and plastics, plus dopants. This materials flexibility, and the improved geometrical uniformity lead to higher signal-to-noise ratio and lower outgassing, and to a significant improvement in performance.Type: GrantFiled: September 13, 1991Date of Patent: November 30, 1993Inventors: Sadeg M. Faris, Kanti Jain
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Patent number: 5264399Abstract: A ceramic composite body which includes high purity amorphous silica fibers in a ceramic matrix. The ceramic matrix may be a glass ceramic material, a borosilicate glass material or mixtures thereof.Type: GrantFiled: April 28, 1992Date of Patent: November 23, 1993Assignee: International Business Machines CorporationInventors: Jon A. Casey, Sylvia M. DeCarr
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Patent number: 5258335Abstract: A low dielectric, low temperature fired glass ceramic produced by firing at about 800.degree.-900.degree. C. a mixture comprising at least one glass consisting of, by weight percent, 0 to 50% B.sub.2 O.sub.3, 35 to 65% CaO, and 10 to 65% SiO.sub.2, and selected from the glasses of CaO-B.sub.2 O.sub.3 -SiO.sub.2 glass system. The glass ceramic is light weight, exhibits a dielectric constant of less than about 7.9, has adequate mechanical strength and thermal conductivity, and is compatible with precious metal conductors. The glass ceramic is useful in the manufacture of integrated circuits and any other electronic or mechanical components where a glass ceramic exhibiting this particular combination of characteristics is suitable.Type: GrantFiled: February 19, 1992Date of Patent: November 2, 1993Assignee: Ferro CorporationInventors: S. K. Muralidhar, Gordon J. Roberts, Aziz S. Shaikh, David J. Leandri, Dana L. Hankey, Thomas J. Vlach
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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