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| Number | Title | Issue Date |
| 7381258 | Opaque dental ceramic—method of production and use therof The invention relates to an opaque dental ceramic for burning on a rack or implant of dental restoration at least comprising SiO2, Al2O3, B2O3, Na2O, K2O as well as TiO2. To cove... | 06/03/2008 |
| 7306845 | Optical materials and optical devices Nanoscale particles, particle coatings/particle arrays and corresponding consolidated materials are described based on an ability to vary the composition involving a wide range of metal and/or metalloid elements and corresponding compositions. In particular, metallo... | 12/11/2007 |
| 7297645 | Opalescent glass-ceramic product An opalescent glass-ceramic product, especially for use as a dental material or as an additive to or component of dental material, including SiO2, Al2O3, P2O5, Na2O, K2O, CaO and Me(IV))O | 11/20/2007 |
| 7182923 | Reaction chamber that comprises a jacket that contains at least one module that is connected by flexible means to the jacket and that contains heat exchange means A device has a reaction chamber with at least one feed inlet (5) and at least one evacuation outlet (10). An outside jacket (2a) that is resistant to internal pressure is positioned around the device and contains at least one module (4... | 02/27/2007 |
| 7166548 | Apatite glass ceramic based on siliceous oxyapatites Apatite glass ceramic which contains at least one glass phase and at least one apatite phase and is characterized in that at least one of the apatite phases is a phosphate- and fluorine-free siliceous oxyapatite phase. ... | 01/23/2007 |
| 7151063 | Glass for multilayer film filter and method for manufacturing the glass Glass can have a high thermal expansion coefficient when it is made up of SiO2, B2O3, Na2O, K2O, MgO and Al2O3; contains a partial crystal; and has a mean linear expansion coefficient not l... | 12/19/2006 |
| 7141521 | Flat float glass This invention relates to a flat float glass that can be prestressed or transformed into a glass ceramic with high quartz mixed crystals or keatite mixed crystals. To eliminate undesirable surface defects during floating and to achieve superior characteristics of th... | 11/28/2006 |
| 7091142 | Glass-ceramic and its production and use The invention encompasses a glass-ceramic comprising a continuous glass phase and a crystal phase comprising tetragonal leucite, wherein the glass-ceramic has a crack-free glass phase and a crystal phase comprising leucite crystals distributed essentially homogeneou... | 08/15/2006 |
| 7087293 | Thick film dielectric compositions for use on aluminum nitride substrates The present invention relates to a Cd-free and Pb-free glass composition comprising, based in mol %, 1–10% MO where M is selected from Ba, Sr, Ca and mixtures thereof, 5–30% MgO, 0.3–5% CuO, 0–2.5% P2O5, 0–2.5% ZrO2, 24–4... | 08/08/2006 |
| 7011522 | Methods of producing dental restorations using CAD/CAM and manufactures thereof Ceramic precursor powders are combined with a binder and pressed into blocks or similar shapes to form green bodies. The ceramic powders consist of fairly uniform particles thoroughly dispersed to be essentially free of agglomerates such that it will sinter predicta... | 03/14/2006 |
| 7008891 | Crystallized glass for optical filter substrate, and optical filter A crystallized glass for an optical filter substrate, which has an average linear expansion coefficient αL of from 95×10−7/° C. to 130×10−7/° C. at from −30° C. to 70° C. and which has a crystal or the like of Na4-x... | 03/07/2006 |
| 7001866 | Modification of the pore structure of metal oxide and mixed metal oxide supports for catalysts synthesis A porous catalyst support having an increased average pore size is produced from a mixed metal oxide material. In accordance with one embodiment, a method for preparing a mixed metal oxide material includes providing a mixed metal oxide precursor containing at least... | 02/21/2006 |
| 6984261 | Use of ceramics in dental and orthodontic applications The invention relates to uses of glasses and glass-ceramics in dental and orthodontic applications. ... | 01/10/2006 |
| 6946414 | Glass-ceramics, process for the their preparation and use Glass-ceramic consisting of: SiO2: −30-70 wt %; A12O3: 8-45 wt %; M2O:8-30 wt %; MO: 0-30 wt %; B2O3: 0-15 wt %; P2O5: 0-15 wt %; Zr2O: 0-12 wt %; TiO2: 0... | 09/20/2005 |
| 6849334 | Optical materials and optical devices Nanoscale particles, particle coatings/particle arrays and corresponding consolidated materials are described based on an ability to vary the composition involving a wide range of metal and/or metalloid elements and corresponding compositions. In particular, metallo... | 02/01/2005 |
| 6846760 | Flat float glass This invention relates to a flat float glass that can be prestressed or transformed into a glass ceramic with high quartz mixed crystals or keatite mixed crystals. To eliminate undesirable surface defects during floating and to achieve superior characteristics of th... | 01/25/2005 |
| 6821628 | Glass-ceramic cooking panel that makes deposited material, such as dirt, less conspicuous The cooking panel is made from an opaque glass-ceramic material uniformly colored throughout and having keatite mixed crystals as the predominant crystalline phase. The cooking panel is made by ceramicizing a ceramicizable glass or a transparent glass-ceramic with h... | 11/23/2004 |
| 6770111 | Pollucite-based ceramic with low CTE A ceramic structure which is pollucite-based and has high refractoriness and high resistance to thermal shock. The inventive structure is suitable in high temperature applications such as a filtering particulates from diesel engine exhaust. ... | 08/03/2004 |
| 6753070 | Insulating ceramic compact, ceramic multilayer substrate, and ceramic electronic device An insulating ceramic compact is provided which can be obtained by low-temperature firing, has a low relative dielectric constant and superior high frequency characteristics, and can be co-sintered with a material having a high coefficient of thermal expansion. The ... | 06/22/2004 |
| 6673433 | Stainproof material and method for manufacturing the same, and coating composition and apparatus thereof Disclosed are antifouling material possessing excellent surface antifouling properties, particularly excellent antifouling activity against greasy stains and soils, a process for producing the same, and a coating composition and an apparatus for the antif... | 01/06/2004 |
| 6660073 | Method of manufacture of dental porcelain having small leucite crystallites A porcelain composition for dental restorations comprising a leucite crystallite phase and a glass matrix phase, wherein the leucite crystallites possess diameters not exceeding about 10 micron. Preferably, the porcelain composition has a maturing tempera... | 12/09/2003 |
| 6645285 | Machinable glass-ceramics Micaceous glass-ceramics are useful in the fabrication of single and multi-unit dental restorations including but not limited to orthodontic appliances, bridges, space maintainers, tooth replacement appliances, splints, crowns, partial crowns, dentures, p... | 11/11/2003 |
| 6572955 | Ceramics having excellent high-frequency characteristics and method of producing the same High-frequency ceramics containing SiO2, Al2 O3, MgO, ZnO and B2 O3 as constituent components, said ceramics comprising: 30 to 50% by weight of a crystal phase containing ZnO and Al2 O3 | 06/03/2003 |
| 6342302 | Ceramic dental restoration A ceramic restoration based on a leucitic glass-ceramic, which is characterized in that the glass-ceramic includes by way of components 40-95 wt.-% SiO2 5-25 wt.-% Al2 | 01/29/2002 |
| 6133174 | Machinable leucite-containing porcelain compositions and methods of manufacture A method for producing a machinable feldspathic porcelain comprising leucite is presented. Machinability is imparted to feldspathic porcelains by achieving homogeneous distribution of fine crystalline constituent comprised of at least one of the following... | 10/17/2000 |
| 6120591 | Low fusing dental porcelains containing fine-grained leucite A dental porcelain composition, comprising a glassy matrix and leucite crystallites embedded therein, and having maturing temperatures in the range from about 600° C. to about 885° C. and CTEs in the range from about 11 to about 19, more preferably in t... | 09/19/2000 |
| 6086977 | Substrates for magnetic discs, magnetic discs and process for producing magnetic discs A magnetic disc substrate is provided, which includes a magnetic disc substrate body made of glass and is characterized in that a metal element capable of absorbing light is present in at least a surface portion of the magnetic disc substrate body, and a ... | 07/11/2000 |
| 6086662 | Low fusing dental porcelains containing tetragonal rubidium-leucite A dental porcelain composition, comprising a glassy matrix and rubidium leucite crystallites embedded therein, and having maturing temperatures in the range from about 650° C. to about 800° C. and CTEs in the range from about 13 to about 17, more prefer... | 07/11/2000 |
| 6080692 | High-strength, translucent mica glass-ceramics The invention relates to a glass ceramic in which mica and ZrO2 are present in crystallized form, containing: K2 O: 0-9% by weight Na2 O: 0-9% by weight with the condition that Na2 O and K2 O together make... | 06/27/2000 |
| 5994246 | Low expansion feldspathic porcelain A feldspathic porcelain composition is provided which comprises a continuous glassy matrix phase and a discontinuous, substantially uniformly dispersed cubic leucite crystalline phase, said composition possessing a fusion temperature of from about 800° t... | 11/30/1999 |
| 5944884 | Dental porcelain composition A porcelain composition for dental restorations comprising a leucite crystallite phase and a glass matrix phase, wherein the leucite crystallites possess diameters not exceeding about 10 micron. Preferably, the porcelain composition has a maturing tempera... | 08/31/1999 |
| 5925180 | ZrO2 -containing glass-ceramic A ZrO2 -containing glass ceramic is described, the main crystalline phase of which is formed by ZrO2 and which has at least one further crystalline phase, and which can be used in particular in dentistry.... | 07/20/1999 |
| 5877101 | Glass-ceramic composite A glass-ceramic composite which has forsterite in an amount of 40 to 60% by weight is included in crystallized glass having a coefficient of thermal expansion of 100° to 200×10-7 /°C. is used to configure a package, to the electrode pads of ... | 03/02/1999 |
| 5866240 | Thick ceramic on metal multilayer circuit board Multilayer green tape stacks having sufficient layers so that the fired stack is at least 2 millimeters in thickness on a metal support substrate are made by interleaving two types of green tapes comprising a low dielectric loss glass of a first type incl... | 02/02/1999 |
| 5786288 | Low dielectric ceramic compositions for multilayer ceramic package A crystallizable ceramic composition for forming a ceramic dielectric body having a dielectric constant in the range of 4.8-5.3 at 1 MHz and a linear thermal expansion coefficient of 4.0-5.1×10-6 K-1 in the temperature range of 25°... | 07/28/1998 |
| 5744208 | Glass-ceramics containing lithium disilicate and tridymite This invention is directed at the makings of glass-ceramic which is uniquely suited for use as a disc substrate for utilization in a magnetic memory storage device. The glass ceramic material exhibits a crystal phase assemblage comprised predominately of ... | 04/28/1998 |
| 5698019 | Leucite-containing phosphosilicate glass-ceramic A leucite-containing phosphosilicate glass-ceramic is described which, in addition to a leucite crystalline phase and at least one further crystalline phase, also contains one or more glass phases.... | 12/16/1997 |
| 5698482 | ZrO2 - containing glass-ceramic A ZrO2 -containing glass ceramic is described, the main crystalline phase of which is formed by ZrO2 and which has at least one further crystalline phase, and which can be used in particular in dentistry.... | 12/16/1997 |
| 5653791 | Two-phase dental forcelain composition A two-phase porcelain composition for dental restorations comprising a leucite crystallite phase dispersed in a feldspathic glass matrix, a maturing temperature of from about 750° to about 1050° C. and a coefficient of thermal expansion of from about 12... | 08/05/1997 |
| 5622551 | Chemically derived leucite Chemically derived leucite is claimed. The chemically derived leucite is obtained from a stable dispersion of a potassia precursor, an alumina precursor and a silica precursor having a specified dry weight solids content. Chemically derived tetragonal leu... | 04/22/1997 |
