Halogen Containing Patents (Class 501/30)
  • Patent number: 8383531
    Abstract: A glass flake of the present invention has a composition that includes, in terms of mass %, 59?SiO2<65, 8?Al2O3?15, 47<(SiO2—Al2O3)?57, 1?MgO?5, 20?CaO?30, 0<(Li2O+Na2O+K2O)<2, and 0?TiO2?5 and that is substantially free from B2O3, F, ZnO, BaO, SrO, and ZrO2.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: February 26, 2013
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Kosuke Fujiwara, Akihiro Koyama
  • Patent number: 8298971
    Abstract: The present invention relates to a ceramic powder and special raw material and use thereof. The raw material of the ceramic powder comprises 20-80 mass parts of SiO2, 10-50 mass parts of AlF3 and 0-30 mass parts of regulator. The raw material for preparing the ceramic powder is mixed and crushed, followed by melted into liquid glass at 1200-1400° C., quenched to obtain the ceramic powder. The low temperature co-fired ceramic powder has the following advantages: low sintering temperature (750-850° C.) and controllable sintering shrinkage rate; the dielectric constant of the ceramic block prepared with the ceramic powder is adjustable between 4.5 and 10 (1 MHz), the dielectric loss is less than 0.002, the mechanical strength is high and the preparation process is simple. The ceramic powder may be used for electric devices such as ceramic substrate, resonator, etc. as well as in other microelectronic packaging.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: October 30, 2012
    Assignee: Tsinghua University
    Inventors: Ji Zhou, Rui Wang, Hongjie Zhao
  • Patent number: 7946131
    Abstract: The subject invention is directed to a method for producing a raw material or materials that can be used by themselves or in combination with other ingredients to make glass of high quality at high efficiencies and short production times. The raw materials are capable of high reactivity in a glass melting furnace and therefore will allow glass to be produced either at lower temperatures or shorter residence times at the same temperatures as compared with known methods.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: May 24, 2011
    Assignee: Johns Manville
    Inventors: Jon Frederick Bauer, Susan McMillin Gee
  • Patent number: 7908886
    Abstract: The invention is directed to oxyhalide fining agents for glass and processes for making glass using such a fining agent.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: March 22, 2011
    Assignee: Corning Incorporated
    Inventors: Lauren Kay Cornelius, Adam James Ellison, Shari Elizabeth Koval
  • Patent number: 7905932
    Abstract: A mixed quartz powder contains quartz powder and two or more types of doping element in an amount of from 0.1 to 20 mass %. The aforementioned doped elements include a first dope element selected from the group consisting of N, C and F, and a second dope element selected from the group consisting of Mg, Ca, Sr, Ba, Sc, Y, Ti, Zr, Hf, the lanthanides and the actinides. The “quartz powder” is a powder of crystalline quartz or it is a powder of glassy SiO2 particles. It is made form natural occurring quartz or it is fabricated synthetically. The “quartz powder” may be doped. The compounding ratio of the total amount (M1) of the aforementioned first elements and the total amount (M2) of the aforementioned second elements as the ratio of the number of atoms (M1)/(M2) is preferably from 0.1 to 20. Al as well as the aforementioned doped elements is preferably included in a mixed quartz powder of this invention.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: March 15, 2011
    Assignees: Heraeus Quarzglas GmbH & Co. KG, Shin-Etsu Quartz Products Co. Ltd.
    Inventor: Tatsuhiro Sato
  • Publication number: 20090325774
    Abstract: A fluorophosphate glass having a fluorine content of 25% or more by anionic %, which is produced from a glass raw material containing 0.1 to 0.5%, by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine, and a phosphate glass having a fluorine content of less than 25% by anionic %, which is produced from a glass raw material containing 0.1 to 5% by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine.
    Type: Application
    Filed: June 29, 2007
    Publication date: December 31, 2009
    Applicant: Hoya Corporation
    Inventor: Mikio Ikenishi
  • Publication number: 20090215608
    Abstract: The invention is directed to oxyhalide fining agents for glass and processes for making glass using such a fining agent.
    Type: Application
    Filed: February 22, 2008
    Publication date: August 27, 2009
    Inventors: Lauren Kay Cornelius, Adam James Ellison, Shari Elizabeth Koval
  • Patent number: 7504154
    Abstract: The present invention is directed to a salt optic provided with a multilayer coating in order to improve upon the moisture resistance of a salt optic, when compared to the moisture resistance of an uncoated salt optic. In one aspect, the present invention is comprised of a coated salt optic having at least a first coating layer and a second coating layer, the first coating layer being surface-smoothing layer and adhesion layer, and the second coating layer being a moisture barrier layer.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: March 17, 2009
    Assignee: Lockheed Martin Corporation
    Inventors: James Neil Johnson, David Corbin Burton, Kevin Warner Flanagan
  • Patent number: 7288495
    Abstract: The present invention provides an alkali alumino-silicate Na—F-containing glass material and a method of making the alkali alumino-silicate Na—F-containing glass material, with the glass material capable of being made photosensitive and thus formed into optical elements at wavelengths ranging between about 240 to 350 nm, and more particularly at the standard 248 nm wavelength of excimer lasers. Also disclosed is optical element wherein a refractive index pattern formed in the alumino-silicate Na—F containing glass material, the refractive index pattern including regions of high refractive index and regions of low refractive index, the difference between the refractive indices of the high refractive index regions and the low refractive index regions being at least 4×10?5 at a wavelength of 633 nm.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: October 30, 2007
    Assignee: Corning Incorporated
    Inventors: Joeseph F Schroeder, Nicholas F Borrelli, George B Hares
  • Patent number: 7265069
    Abstract: The invention provides an opalescent forehearth color concentrate comprising a non-smelted agglomerated interspersion of particles for use in coloring glass, said concentrate comprising by weight from about 10% to about 70% of a glass component and from about 30% to about 90% of one or more opalescent pigments, the glass component comprising by weight from about 10% to about 50% ZnO and about 15 to about 60% SiO2. The invention also provides a method of using the color concentrate.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: September 4, 2007
    Assignee: Ferro Corporation
    Inventors: George E. Sakoske, Kenneth R. Ackerman, John M. Bauer
  • Patent number: 6698245
    Abstract: Rock fibres are made from a melt formed from a blend of low and high halogen waste materials. 80 to 98% are low halogen materials (containing less than 0.5 wt. % halogen) and 2 to 20% are high halogen materials (containing at least 1 wt. % halogen).
    Type: Grant
    Filed: July 25, 2000
    Date of Patent: March 2, 2004
    Assignee: Rockwool International A/S
    Inventors: Vermund Rust Christensen, Soren Lund Jensen, Jens Ranlov
  • Patent number: 6563639
    Abstract: Polarized glass articles and method of manufacturing polarizing glass articles are disclosed. Optical isolators using the polarizing glass articles have reduced coupling and surface losses when compared with conventional optical isolators.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: May 13, 2003
    Assignee: Corning Incorporated
    Inventors: Nicholas F. Borrelli, Donald M. Trotter, Jr.
  • Patent number: 6499317
    Abstract: A synthetic quartz glass for optical use, to be used by irradiation with light within a range of from the ultraviolet region to the vacuum ultraviolet region, which contains fluorine, which has a ratio of the scattering peak intensity of 2250 cm−1 (I2250) to the scattering peak intensity of 800 cm−1 (I800), i.e. I2250/I800, of at most 1×10−4 in the laser Raman spectrum, and which has an absorption coefficient of light of 245 nm of at most 2×10−3 cm−1.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: December 31, 2002
    Assignee: Asahi Glass Company, Limited
    Inventors: Yoshiaki Ikuta, Shinya Kikugawa, Noriaki Shimodaira, Akio Masui, Shuhei Yoshizawa
  • Patent number: 6196027
    Abstract: The invention is a method of making silicate based glass compositions with phosphorus compounds included in the composition as spectral modifiers to impart desirable color and improved energy absorbance properties. The phosphorus compound is generally a metal phosphide which is added to the batch glass composition in amounts greater than 0.05 weight percent prior to melting. The composition and method result in a finished glass suitable for use in architectural and automotive glazings.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: March 6, 2001
    Assignee: Libbey-Owens-Ford Co.
    Inventors: Srikanth Varanasi, Michael B. Purvis, Paige L. Higby, Kevin V. Goodwin, Gwendolyn A. Young
  • Patent number: 6110583
    Abstract: Silicate based glass compositions with phosphorus compounds included in the composition as spectral modifiers to impart desirable color and improved energy absorbance properties are disclosed. The phosphorus compound is generally a metal phosphide which is added to the batch glass composition in amounts greater than 0.05 weight percent prior to melting. The composition and method result in a finished glass suitable for use in architectural and automotive glazings.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: August 29, 2000
    Assignee: Libbey-Owens-Ford Co.
    Inventors: Srikanth Varanasi, Michael B. Purvis, Paige L. Higby, Kevin V. Goodwin, Gwendolyn A. Young
  • Patent number: 6107229
    Abstract: The invention relates to an aluminofluorosilicate glass for use in a material for dental restoration, which has the following features:a) a ratio of Al (calculated as Al.sub.2 O.sub.3) to Si (calculated as SiO.sub.2) of 0.57-1.12 by mass;b) a total content of Mg (calculated as MgO) and Ba (calculated as BaO) of 29-36% by mass;c) a ratio of Mg (calculated as MgO) to Ba (calculated as BaO) of 0.028-0.32 by mass;d) a content of P (calculated as P.sub.2 O.sub.5) of 2-10% by mass.The glass according to the invention has a high radiopacity, and the refractive index n.sub.D for visible light can be adjusted by varying the phosphorus content.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: August 22, 2000
    Assignee: Ernst Muhlbauer KG
    Inventors: Rainer Luck, Dieter Reif, Barbara Leuner
  • Patent number: 6001753
    Abstract: Silicate based glass compositions with phosphorus compounds included in the composition as spectral modifiers to impart desirable color and improved energy absorbance properties. The phosphorus compound is generally a metal phosphide which is added to the batch glass composition in amounts greater than 0.05 weight percent prior to melting. The composition and method result in a finished glass suitable for use in architectural and automotive glazings.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: December 14, 1999
    Assignee: Libbey-Owens-Ford Co.
    Inventors: Srikanth Varanasi, Michael B. Purvis, Paige L. Higby, Kevin V. Goodwin, Gwendolyn A. Young
  • Patent number: 5709725
    Abstract: A process for producing a glass melt by heating stock for glass comprising as the main ingredients oxides from which oxide glasses are to be formed into a melt, characterized in that said ingredients are formed into a homogeneous melt in the presence of a halide of a cation selected from the group consisting of hydrogen, lithium, sodium, potassium, magnesium, calcium and ammonium whereby the melting takes place at a lower temperature than that required with no addition of the specific halide.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: January 20, 1998
    Assignee: Kirin Beer Kabushiki Kaisha
    Inventor: Katsuhiro Imashita
  • Patent number: 5639702
    Abstract: Glass colored in yellow, having transmission in the visible light range of the spectrum, which is produced by blending or adding an iodine compound to a matrix of glass having transmission in the visible light range of the spectrum or to the raw materials thereof. The glass has a yellow color of high excitation purity, is stable in color, and has good spectral properties.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: June 17, 1997
    Assignee: Kirin Beer Kabushiki Kaisha
    Inventors: Katuhiro Imashita, Shuichi Yokokura
  • Patent number: 5420082
    Abstract: The invention provides a process which makes it possible to regulate the degree of oxidation-reduction of a glass during its production. According to the invention, which relates to glasses intended to be transformed into continuous or staple fibers containing at most about 1% by weight of Fe.sub.2 O.sub.3, the degree of oxidation of the glass is obtained by incorporating in the mixture of vitrifiable products at least two oxidizing agents, one of them being an inorganic nitrate, the other being, according to preference, an oxidized compound of manganese in which the oxidation state of the manganese is greater than 2, potassium dichromate and/or ceric oxide. The invention particularly favors the recycling of waste from products with a glass fiber base in the vitrifiable mixture.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: May 30, 1995
    Assignee: Saint-Gobain Recherche
    Inventors: Stephane Maugendre, Bernard Dubois
  • Patent number: 5360770
    Abstract: A glass composition, containing barium oxide, which provides a source of leachable fluoride and which can be incorporated into a dental cement composition which, when cured, is radiopaque and translucent.
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: November 1, 1994
    Assignee: Den-Mat Corporation
    Inventor: Thomas C. Chadwick
  • Patent number: 5068209
    Abstract: An optical fluorophosphate glass with an anomalous positive incremental dispersion +.DELTA..nu..sub.e between 11.8 and 12.5, a refractive index n.sub.e between 1.53 and 1.55 and an Abbe coefficient .nu..sub.e between 72.8 and 73.5 has the following atomic composition (in atom %): Mg: 2.0-3.5, Ca: 2.5-4.5, Sr: 13.0-16.0, Ba: 22.0-25.0, Al: 4.5-6.0, K: 0.1-0.3, P: 9.0-12.0, O: 17.0-20.0 and F: 20.0-23.0, the F/P ratio lying between 1.8 and 2.4 and the sum of the alkaline earths between 39.5 and 49. The new glasses are melted from a material having the following initial composition (in wt. %): Ca(PO.sub.3).sub.2 : 1.0-2.5, Ba(PO.sub.3).sub.2 : 23.0-25.5, Al(PO.sub.3).sub.3 : 12.0-14.5, MgF.sub.2 : 6.5-8.5, CaF.sub.2 : 5.5-8.0, SrF.sub.2 : 16.0-19.0, AlF.sub.3 : 10.0-12.5, SrO: 2.0-3.0, BaO: 12.5-14.5 and K.sub.2 TiF.sub.6 : 0.2-0.7, the alkaline earth fluorides content lying between 28.0 and 35.5 and the total content of all fluorides used between 38.2 and 48.7.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: November 26, 1991
    Assignee: Wild Leitz GmbH
    Inventors: Norbert Meinert, Dieter Gelzenleuchter, Henning Franek
  • Patent number: 4885019
    Abstract: Heavy metal fluoride glasses are made by a process that requires high purity fluoride constituent compounds fluorinated oxides, or premelted glass cullet. The charge is placed in an enclosed furnace chamber having the ability of atmosphere control, heat control and position control of the charge. In particular, an inert, or nonreactive atmosphere or air is used in the furnace chamber as well as an oxygen-scavenging metal therein. The oxygen-scavenging metal at the high temperature produces a controlled oxygen partial pressure so that the air is essentially inert and non-reactive although the presence of a slightly oxidizing atmosphere is still required to produce the glass. The charge is rapidly raised to its fusion temperature and held at the temperature for a short time in proximity to an oxygen-scavenging material. The charge is immediately removed from the heating source and quickly cooled through the critical crystallization region. The total heating and cooling time being less than one hour.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: December 5, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Joseph J. Hutta
  • Patent number: 4859634
    Abstract: A complex oxide comprising zirconium oxide and an oxide of at least one metal selected from the group consisting of an alkali metals, alkaline earth metals, silicon and lead is mixed with pottery stone, magnesium fluoride, a compound capable of forming magnesium oxide, a compound capable of forming potassium oxide and a compound capable of forming boron oxide to obtain a composition in which the contents of elements in 100 parts by weight of the total amount exclusive of the ignition loss are 16 to 25 parts of silicon, 6 to 9 parts of aluminum, 5.5 to 12 parts of potassium, 4.7 to 15 parts of magnesium, 0.7 to 5.0 parts of zirconium, 0.7 to 3.2 parts of boron, 3.0 to 9.3 parts of fluorine, up to 7.0 parts of metals other than the foregoing elements, and the balance being oxygen. This composition is heat-melted and then cooled from a temperature higher at least 50.degree. C. than the glass transition temperature of a vitreous body to be formed to a temperature lower by at least 70.degree. C.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: August 22, 1989
    Assignee: Photon Ceramics Kabushiki Kaisha
    Inventors: Motoshige Iwamatsu, Mitsugu Kaji
  • Patent number: 4842631
    Abstract: An improved method of making carbon dioxide and chlorine free fluoride-based glass wherein the atmosphere in the furnace enclosure is sulphur hexafluoride gas at a positive over pressure.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: June 27, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Joseph J. Hutta
  • Patent number: 4717690
    Abstract: An overglaze ink comprising(a) 55 to 70 weight % of a glass composition, the glass composition comprising(1) 15 to 43 weight % of a main glass component selected from the group consisting of BaO, SrO and SrO+BaO,(2) a glass forming component comprising34 to 45 weight % B.sub.2 O.sub.3 and0 to 6 weight % SiO.sub.2(3) 0 to 2 weight % of a colorant selected from the group consisting of Cr.sub.2 O.sub.3, CoO and NiO,(4) 7 to 20 weight % of a thermal expansion modifier selected from the group consisting of ZnO, Al.sub.2 O.sub.3, TiO.sub.2 and mixtures thereof, and(5) 1 to 7 weight % of a dopant comprising one or more of the following:ZnF.sub.2 having a weight % of 0 to 5,Li.sub.2 O having a weight % of 0 to 2,Na.sub.2 O having a weight % of 0 to 2,K.sub.2 O having a weight % of 0 to 2,LiF having a weight % of 0 to 2,NaF having a weight % of 0 to 2,KF having a weight % of 0 to 2,BaF.sub.2 having a weight % of 0 to 2,Na.sub.2 SiF.sub.6 having a weight % of 0 to 2,PbO having a weight % of 0 to 3,V.sub.2 O.sub.
    Type: Grant
    Filed: February 12, 1986
    Date of Patent: January 5, 1988
    Assignee: Heraeus, Inc. Cermalloy Division
    Inventors: Dana L. Hankey, Robert C. Sutterlin
  • Patent number: 4717691
    Abstract: Fluoroglasses, their preparation and intermediate products obtained. These glasses are characterized by containing as the forming element at least about 10% by moles of a metal fluoride or mixture of metal fluorides of the formula MF.sub.n, n being a number equal to 3 or 4, M representing a 5f transition metal when n=4 (fluoride MF.sub.4) and a 4f transition metal or yttrium when n=3 (fluoride MF.sub.3), it being understood that said glasses are free of hydrofluoric acid as the forming element.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: January 5, 1988
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventors: Jacques Lucas, Gilles Fonteneau
  • Patent number: 4680044
    Abstract: The present invention relates to a method of producing a fluoride glass preform and/or fiber having a modified refractive index by heating the fluoride glass preform to a temperature that is above its glass transition temperature, but below its devitrification temperature; inserting a first electrode into the inner core of the preform and surrounding the outer perimeter of the preform with a second electrode of opposite polarity; means for generating an electromotive force; and applying an electromotive force through the first electrode and the second electrode which causes a movement of positive ions toward the electrode of opposite charge while simultaneously causing a movement of negative ions toward its electrode of opposite charge such that the movement of these ions results in a modification of the refractive index of the preform.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: July 14, 1987
    Assignee: Hughes Aircraft Company
    Inventor: Ricardo C. Pastor
  • Patent number: 4666486
    Abstract: Heavy metal fluoride glasses are made by a process that requires high purity fluoride constituent compounds, some of which are further refined by sublimation. Handling occurs in a protective atmosphere such as argon. The charge is placed in a sealed modified optical growth furnace having the ability of atmosphere control, heat control and position control of the charge. The charge is firstly raised to its fusion temperature, then to an admixture temperature, and finally to a higher temperature. The charge is immediately removed from the heating source and quickly cooled through the critical crystallization region. The total heating and cooling time being about one to two hours. The resulting glass ingot is partially annealed. The HMFG of (Zr or Hf)F.sub.4 -BaF.sub.2 -LaF.sub.3 -AlF.sub.2 consistently exhibits low levels of both light scattering and bulk OH contact, along with very reproducible hardness, thermal parameters, and UV and IR edge absorption behavior.
    Type: Grant
    Filed: September 24, 1985
    Date of Patent: May 19, 1987
    Inventor: Joseph J. Hutta
  • Patent number: 4666870
    Abstract: The invention relates to a beryllium free fluoride glass composition used to prepare fluoride glass and the fluoride glass prepared by the composition. The fluoride composition contains only fluoride compounds and does not contain any oxygen atoms.
    Type: Grant
    Filed: July 8, 1986
    Date of Patent: May 19, 1987
    Inventors: Marcel J. Poulain, Michel A. Poulain, Gwenael A. Maze
  • Patent number: 4647545
    Abstract: Halogenated glass comprising 20 to 90 mole percent of at least one of cadmium, manganese and zinc halide and a process for the preparation thereof.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: March 3, 1987
    Assignee: Etablissement Public dit: Centre National de la Recherche Scientifique
    Inventors: Jacques Lucas, Marc Matecki, Michel Poulain, Marcel Poulain
  • Patent number: 4615988
    Abstract: Glass fibers having the following constituents in the ranges of proportions indicated: SiO.sub.2, 57-70 wt. %; Al.sub.2 O.sub.3, 2-7 wt. %; CaO, 5-10 wt. %; MgO, 0-4 wt. %; B.sub.2 O.sub.3, 0-4.5 wt. %; and F, 0.5-4 wt. %; and wherein B.sub.2 O.sub.3 and F are present in amounts according to the relationship:3.ltoreq.B.sub.2 O.sub.3 +1.5 F.ltoreq.6.5and wherein the fibers also contain the alkali oxides Na.sub.2 O and K.sub.2 O, in amounts according to the relationship:16 wt. %<Na.sub.2 O+K.sub.2 O<20 wt. %.The glass fibers are used advantageously in thermal and/or acoustic insulation.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: October 7, 1986
    Assignee: Isover Saint-Gobain
    Inventors: Simone Le Moigne, Marcel Boivent, Guy Matzen
  • Patent number: 4605632
    Abstract: This invention relates to the production of transparent, high silica glass envelopes for tungsten-halogen lamps consisting essentially, by weight, of 1-2.5% Al.sub.2 O.sub.3, 0.25-1% CaO, 0.1-0.25 Na.sub.2 O and/or K.sub.2 O, 2.5-3.5% B.sub.2 O.sub.3, 0.15-0.3% F, and the remainder SiO.sub.2.
    Type: Grant
    Filed: October 24, 1984
    Date of Patent: August 12, 1986
    Assignee: Corning Glass Works
    Inventor: Thomas H. Elmer
  • Patent number: 4597786
    Abstract: A fluoride glass for infrared optical transmission fiber is purified for dehydration and deoxidation to reduce transmission loss by reacting melted fluoride glass with NF.sub.3 gas at temperature between 500.degree. C. and 800.degree. C. No scattering loss is increased by the present purification as decomposed product in the reaction does not precipitate.
    Type: Grant
    Filed: August 19, 1985
    Date of Patent: July 1, 1986
    Assignee: Kokusai Denshin Denwa Co., Ltd.
    Inventors: Tetsuya Nakai, Yoshinori Mimura, Osamu Shinbori, Hideharu Tokiwa
  • Patent number: 4560667
    Abstract: Halogen glass is treated, while heated above its fusion temperature, with carbon disulphide. The resulting halogen glass is essentially free of parasitic absorption bands in the infra-red spectrum. The treatment with carbon disulphide apparently lowers the hydroxyl ion content and the metal-oxygen bonds sufficiently to avoid the infra-red absorption bands.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: December 24, 1985
    Assignee: Centre National de la Recherche Scientifique
    Inventors: Jacques Lucas, Gilles Fonteneau
  • Patent number: 4537864
    Abstract: Novel halide glass-forming compositions in the CdF.sub.2 -AlF.sub.3 -PbF.sub.2 and CdF.sub.2 -AlF.sub.3 -PbF.sub.2 -LiF composition fields are disclosed which exhibit unusual glass stability. The constituents of these glasses are potentially vapor transportable, so that very pure glass articles exhibiting excellent infrared transparency can be envisioned.
    Type: Grant
    Filed: August 31, 1983
    Date of Patent: August 27, 1985
    Assignee: Corning Glass Works
    Inventor: Paul A. Tick
  • Patent number: 4537862
    Abstract: Glass frit compositions are shown that are lead-free, cadmium-free, and zinc-free, the compositions having improved chemical resistance, especially acid resistance (acetic acid) of a loss of generally less than about 1.9% by weight. The compositions contain B.sub.2 O.sub.3, SiO.sub.2, ZrO.sub.2 and rare earth oxides, the weight ratio of ZrO.sub.2 to rare earth oxides being critical and being about 1/1 to 1.4/1.
    Type: Grant
    Filed: April 27, 1984
    Date of Patent: August 27, 1985
    Assignee: Owens-Illinois, Inc.
    Inventors: Josef Francel, Uriah Horn, Daniel R. Stewart
  • Patent number: 4521250
    Abstract: A mixture for preparation of protective and insulating coatings on metals and metal products which sticks well to metal surfaces, is resistant to high temperatures, has good electrical properties, and provides good heat removal. The mixture includes aluminum oxide, barium oxide, boron oxide, silicon oxide, and aluminum fluoride.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: June 4, 1985
    Assignee: Universita Karlova
    Inventors: Radomir Kuzel, Josef Broukal, Vaclav Bouse
  • Patent number: 4521523
    Abstract: A method of introducing fluorine into glasses characterized by high fluorine retention and low processing costs which involves introducing the fluorine into the glass batch as a fluorine-containing frit comprising an inorganic fluoride and containing from about 6 to about 10 weight percent fluorine.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: June 4, 1985
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: Patrick F. Aubourg, Barbara L. Fabricant
  • Patent number: 4503158
    Abstract: An at least double silicate of an alkali metal and at least one other metal is prepared by interreacting (i) an aqueous solution of an alkali metal silicate and (ii) a solution of an oxide of such at least one other metal, or salt thereof, in the presence of (iii) a water-miscible polar organic liquid, whereby said at least double silicate is suspended in the organic reaction medium in insoluble and finely divided form. The separated product is an admirable glass-former.
    Type: Grant
    Filed: April 13, 1983
    Date of Patent: March 5, 1985
    Assignee: Rhone-Poulenc Industries
    Inventor: Christian Richard
  • Patent number: 4483931
    Abstract: This invention is directed to the preparation of glasses in the PbO--Ga.sub.2 O.sub.3 field exhibiting good infrared transmitting characteristics out to wavelengths of 8 microns. The binary glasses consist essentially, by weight, of about 15-28% Ga.sub.2 O.sub.3 and 72-85% PbO. However, the preferred glasses contain up to 85% Bi.sub.2 O.sub.3 and consist essentially as included within the area generally encompassed by the curve in FIG. 2.
    Type: Grant
    Filed: March 21, 1983
    Date of Patent: November 20, 1984
    Assignee: Corning Glass Works
    Inventors: William H. Dumbaugh, Jr., Brian P. Tyndell
  • Patent number: 4477579
    Abstract: Coating for carbon electrodes used as anodes in the electrolysis of alumina to produce aluminum are disclosed. The coatings are aqueous and contain zinc chloride and powdered alumina.
    Type: Grant
    Filed: April 14, 1983
    Date of Patent: October 16, 1984
    Assignee: Nalco Chemical Company
    Inventor: Frederick V. Reven
  • Patent number: 4420569
    Abstract: This invention is directed to the production of glasses within the Li.sub.2 O-K.sub.2 O-ZrO.sub.2 -F-P.sub.2 O.sub.5 system having batch compositions as generally depicted in terms of mole percent in FIG. 2.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: December 13, 1983
    Assignee: Corning Glass Works
    Inventor: Paul A. Tick
  • Patent number: 4363879
    Abstract: Fluorophosphate glass free of beryllium with a refractive index n.sub.e between 1.40 and 1.46, an Abbe value v.sub.e between 85 and 94 and a high positive anomalous partial dispersion value +.DELTA.v.sub.e between 19 and 28 is described. The glass is melted from a mixture containing as groups of components metaphosphate, fluorides and an alkali fluoroborate in certain proportions expressed in % by weight, in the following manner: the intermixed mixtue is heated to a temperature between 800.degree. and 800.degree. C., the melt refined at a temperature between 900.degree. and 1000.degree. C. for a period of 8 and 25 minutes, homogenized at a temperature between 900.degree. and 1000.degree. C. within a period of time of 5 to 15 minutes, the temperature reduced to a pouring temperature between 575.degree. and 650.degree. C. and the melt poured into casting molds preheated to approximately 320.degree. C., in particular aluminum molds.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: December 14, 1982
    Assignee: Ernst Leitz Wetzlar GmbH
    Inventors: Heinz Broemer, Norbert Meinert
  • Patent number: 4362819
    Abstract: The present invention is directed to the production of essentially dry alkali metal (R.sup.1) aluminofluorophosphate glasses optionally containing at least one divalent metal (R.sup.2) which exhibits a transition temperature below about 350.degree. C., good chemical durability, resistance to weathering, and glass stability, and which demonstrate the capability of being molded at temperatures below 400.degree. C. into complex shapes. The alkali metal aluminofluorophosphate glasses consist essentially, as analyzed on an atomic basis, between about R.sup.1 AlP.sub.2 F.sub.2 O.sub.6 and R.sup.1 .sub.3.75 AlP.sub.3 F.sub.4 O.sub.9 with the requirement that the components comply with the following atomic ratios:F:Al >2 but <4 (preferred 3.+-.0.5)P:Al >2 but <3R.sup.1 :P >0.5 but <1.24 (preferred >0.75 but <1.1)Those values, expressed in terms of weight percent as analyzed on the oxide basis, convert to the following approximate ranges:R.sup.1.sub.2 O 13-38Al.sub.2 O.sub.3 16-23P.sub.2 O.sub.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: December 7, 1982
    Assignee: Corning Glass Works
    Inventors: Anthony R. Olszewski, Paul A. Tick, Leon M. Sanford, deceased