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A forehead support apparatus for resting a standing users forehead against a wall above a bathroom commode or urinal or beneath a showerhead.
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| Number | Title | Issue Date |
| 7320949 | Optical glass An optical glass suitable for precision mold pressing has a refractive index (nd) of 1.88 or over and an Abbe number (ν d) within a range from 22 to 28, comprises, in mass %, | 01/22/2008 |
| 7312169 | Optical glass for precision molding The present invention provides a high refractive index, high dispersion optical glass for precision molding, being free from harmful materials causing environmental problems, such as lead oxide, etc., and having a low yield temperature, a refractive index (nd) of at... | 12/25/2007 |
| 7309670 | Optical glass; press-molding preform and method of manufacturing same; and optical element and method of manufacturing same The present invention relates to optical glass having a high refractive index, high dispersion, and a low glass transition temperature; a preform comprised of the optical glass for precision press-molding and a method of manufacturing the same; and an optical elemen... | 12/18/2007 |
| 7060640 | Optical glass An optical glass comprises, in mass percent, 15–35% of P2O5, 40–60% of Nb2O5, 0.5% to less than 15% of Na2O and 3% to less than 25% of BaO, has a ratio in mass % of (BaO+Nb2O5)/{(TiO | 06/13/2006 |
| 7015164 | Optical glass, glass material for press molding, optical element, and method of manufacturing same Disclosed is an optical glass comprising, expressed as weight percentages, greater than or equal to 18 percent and less than 30 percent of SiO2, greater than or equal to 12 percent and less than 23 percent of BaO, 22 to 37 percent TiO2, greater... | 03/21/2006 |
| 6875714 | Optical glass and optical element made of the optical glass An optical glass consists essentially, expressed in term of weight percent, of: P2O5: 20.0 to 30.0%, B2O3: 0.5 to 10.0%, Nb2O5: 5.0 to 50.0%, WO3: 15.0 to 27.0%, Bi2O3... | 04/05/2005 |
| 6756334 | Optical glass An optical glass includes SiO2; PbO; B2O3; not less than 0.1 mass % of TeO2; and not less than 0.4 mass % of Li2O. ... | 06/29/2004 |
| 6645894 | Optical glass and optical part An optical glass that substantially does not contain any Ta2 O5 and has high-refractivity low-dispersion optical properties and various optical parts made of such optical glass are provided stably at a low cost, and an optical part m... | 11/11/2003 |
| 6514892 | Transparent beads and their production method Transparent solid, fused microspheres are provided. In one embodiment, the microspheres contain alumina, zirconia, and silica in a total content of at least about 70% by weight, based on the total weight of the solid, fused microspheres, wherein the total... | 02/04/2003 |
| 6468935 | Optical glass An optical glass comprises the following composition in mass percent of: SiO2 18-29%; PbO 68-78%; and TeO2 0.1-3.5%; wherein the glass has optical constants which are a refractive index (nd) having a range of 1.75 to 1.87 and an Abbe... | 10/22/2002 |
| 6333282 | Optical glass for precision molding The present invention provides an optical glass for precision molding, having excellent properties, i.e. yield temperature (At) of at most 550° C., refractive index (nd) of at least 1.83 and Abbe number (.nu.d) of at most 26.0 and further providing a low... | 12/25/2001 |
| 6333288 | Lead-free optical glasses The invention can relate to essentially lead-free optical glasses having a refractive index nd of from about 1.65 to about 1.87 and an Abbe number .nu.d of from about 27 to about 43 and a composition (in % by weight, based on oxide) ... | 12/25/2001 |
| 6251813 | Optical glass and its use An optical glass having properties of a high refractive index and low dispersion and having both a low sag temperature Ts and a low liquidus temperature L.T., is provided. The optical glass comprises, by % by weight, 25 to 42% of B2 ... | 06/26/2001 |
| 6235667 | Vitrifiable mixture for quality glasses A lead-free glass, which is suitable for use as imitation lead crystal tableware and decorative crystal glassware, has a chemical composition as a percentage by weight within the following range: silica 50-58 zirconium oxide 0-5 ... | 05/22/2001 |
| 6187702 | Ophthalmic and optical glasses Ophthalmic and optical glasses have a composition in weight percent of 4.5-9.5% SiO2, 10-19.5% B2 O3, 0-3% Al2 O3, 0-5% GeO2, 18--less than 23% La2 O3, 0.3--less than 2% Gd... | 02/13/2001 |
| 6156684 | Light polarization control element using stress-optical coefficient glass and method of producing the stress-optical coefficient glass In a light polarization control element using a stress-optical coefficient glass, the stress-optical coefficient glass is substantially composed of a phosphorous acid glass containing 20 to 60 percent by weight of P2 O5 and 40 to 73 ... | 12/05/2000 |
| 5565389 | Ophthalmic glass of high refractive index The invention relates to a glass of high refractive index suitable for the close-vision part of multifocal, in particular phototropic multifocal, spectacle lenses. The glass has a composition (in % by weight, based on oxide) of: SiO2 28-40; B | 10/15/1996 |
| 5518970 | Nitride glasses and methods of making same The present invention relates generally to a novel and unique class of gly materials and methods of making such materials in which substantially all of the anions are nitride ions, in contrast to the oxide ions of conventional optical glasses, or the flu... | 05/21/1996 |
| 5439495 | Solution doping of sol gel bodies to make graded index glass articles A method for manufacturing a glass is provided, comprising converting a porous body to a multi-component glass, wherein a porous body containing at least one metal component in the form of a metal salt is immersed in a solution containing at least one com... | 08/08/1995 |
| 5340778 | Optical crown glass having negative anomalous partial dispersion and high UV transmission An optical crown glass having a negative anomalous partial dispersion ƊPg,F, a refractive index nd of greater than 1.52, an Abbe number .nu.d of greater than 57, and a high UV transmission has a composition (in % by weigh... | 08/23/1994 |
| 5288669 | Glasses with very high index of refraction and low density This invention relates to glasses exhibiting refractive indices higher than 1.880, Abbe numbers of at least 29, densities lower than 4.1, good chemical durability and stability against devitrification, and an integrated transmission over the range of 380-... | 02/22/1994 |
| 5213440 | Method of making yellow transparent tempered glass and glass product A method of making a yellow, transparent tempered glass and the product so made that comprises adding a certain quantity of CeO2 and TiO2 to the glass composition prior to a rapid cooling of the composition. Each additive is in the amount of about 1% to 6... | 05/25/1993 |
| 5162826 | High index ophthalmic glasses This invention relates to the production of glasses exhibiting a refractive index between about 1.66-1.81, a softening point between about 625°-675° C., a strain point between about 455°-490° C., a linear coefficeint of thermal expansion (25°-30... | 11/10/1992 |
| 5137850 | Optical glass of negative anomalous partial dispersion in the blue region A chemically resistant glass which can be produced at relatively low melting temperatures and has anomalous negative partial dispersion Pg,F, a refractive index nd of from 1.73 to 1.83 and an Abbe coefficient vd of from 31... | 08/11/1992 |
| 4772511 | Transparent non-vitreous zirconia microspheres Solid, transparent, non-vitreous, zirconia and zirconia-silica ceramic microspheres, useful as lens elements in retroreflective pavement markings. The microspheres are characterized by: (a) containing at least one additive metal oxide selected from alumina, ... | 09/20/1988 |
| 4742028 | Optical and ophthalmic glasses This invention is concerned with a glass for optical and/or ophthalmic applications having an index of refraction between about 1.78-1.82, an Abbe number greater or equal to 31, and a density less than about 3.80 g/cm3 consisting essentially, e... | 05/03/1988 |
| 4734389 | Highly refractive optical glass with refractive indices >1.83 and Abbe numbers <25, and with very good chemical stability A highly refractive optical glass (nd ࣙ1.83) with high dispersion (vd ࣘ25) and very good chemical stability at relatively low density (δࣘ3.5 g/cm3) consists of (in weight percent) SiO2 19-25, Na2 | 03/29/1988 |
| 4732876 | Ophthalmic and optical glass An Ophthalmic and optical glass which is a B2 O3 - SiO2 - Li2 O - CaO - La2 O3 - TiO2 - ZrO2 -Nb2 O5 system in which relatively large amounts of B | 03/22/1988 |
| 4721690 | High PbO-content glasses in the system SiO2 --PbO--M2 O with increased chemical stability High PbO-content glass in the optical range of flint and heavy flint glasses from the system SiO2 --PbO--M2 O wherein M2 O=alkali metal oxides, said glass having a minimum PbO content of 30 wt. % and a minimum M2 | 01/26/1988 |
| 4612295 | Glass for eye glass lens A glass for an eye glass lens comprising a SiO2 (or B2 O3)-CaO-Nb2 O5 system as a basic system and having a refractive index of 1.79 or more, an Abbe number of 32 to 38 and a specific gravity of less ... | 09/16/1986 |
| 4584279 | Optical glass with refractive indices>1.90, Abbe numbers>25 and high chemical stability Optical glass with refractive indiciesࣙ1.90, Abbe numbersࣙ25 consisting essentially of, in weight percent; 0-10 SiO2, 2-20 B2 O3, 0-2 Al2 O3, the sum of SiO2, B2 O3, an... | 04/22/1986 |
| 4526874 | Optical light weight glass with a refractive index of >1.70, an Abbe index of >22 and a density of <3.5 G/CM3 An optical glass with the familiar optical position of nd >1.70 and vd >22, which differs from the familiar optical glasses of the optical position due to its lower density and good chemical stability, and is composed of (in percent ... | 07/02/1985 |
| 4495299 | Thallium-containing optical glass composition A thallium-containing optical glass composition which contains the following oxides in the indicated proportions in mole %: and satisfies the following relations:... | 01/22/1985 |
| 4483931 | Lead gallate glasses This invention is directed to the preparation of glasses in the PbO--Ga2 O3 field exhibiting good infrared transmitting characteristics out to wavelengths of 8 microns. The binary glasses consist essentially, by weight, of about 15-2... | 11/20/1984 |
| 4472511 | Highly refractive, ThO2 -free optical glasses having refractive indices of 1.86-1.94 and Abbe-index numbers greater than or equal to 30 Highly refractive, ThO2 -free optical glasses having refractive indices of 1.86-1.94 and Abbe-index numbers greater than or equal to 30, comprise:... | 09/18/1984 |
| 4447550 | Lead aluminoborofluorosilicate moldable glasses The instant invention is directed to optical glass compositions capable of being shaped under the combined action of temperature and pressure in a mold so as to obtain articles having surfaces exhibiting highly precise reproduction of the mold walls. The ... | 05/08/1984 |
| 4439530 | Optical glass An optical glass comprising, in % by weight, 18 to 38% P2 O5 ; 3 to 30% Na2 O+K2 O, with the proviso of 0 to 30% Na2 O and 0 to 30% K2 O; 8 to 65% PbO; 1 to 45% Ta2 O5 ; 0 to 20% Nb | 03/27/1984 |
| 4439531 | CdO-ThO2 -Free, highly refractive optical glass CdO- and ThO-free, highly refractive optical glass having a refractive index of 1.85-2.05 and an Abbe index of 25-43, characterized by the following composition (in percent by weight):... | 03/27/1984 |
| 4433062 | Moldable fluorophosphate glasses containing Nb2 O5 The present invention is directed to fluorophosphate glasses containing about 3-21.5% Nb2 O5 and exhibiting softening points below 500° C. The inventive glasses contemplate two general composition areas in weight percent:... | 02/21/1984 |
| 4400473 | Acidproof, hydrolysis-resistant optical and ophathalmic glass of low density An improved optical glass having an index of refraction of ࣙ1.69, an Abbe number of ࣙ38, and a density of ࣘ3.25 g/cm3, represents a further development of another optical glass recently provided by the same inventors. The new glass has im... | 08/23/1983 |
