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| Number | Title | Issue Date |
| 8047021 | Lithium silicate materials Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength. ... | 11/01/2011 |
| 8042358 | Lithium silicate materials Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength. ... | 10/25/2011 |
| 7665330 | Method for manufacturing glass-ceramics Glass-ceramics includes Li2O, Al2O3 and SiO2, have an average crystal grain diameter of a predominant crystal phase of 90 nm or below and have crystal grain diameter distribution of 20 nm or below. The glass-ceramics can b... | 02/23/2010 |
| 7285506 | Lamp reflector substrate, glass, glass-ceramic materials and process for making the same The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56-67% SiO2; 9-22% Al2O3; 3.4-3.8% L... | 10/23/2007 |
| 7205252 | Method of making a glass-ceramic article The method produces a glass-ceramic article substantially in the form of a plate with improved high temperature difference resistance or strength. The glass-ceramic article contains keatite mixed crystals (KMK) or high quartz mixed crystals (HQMK) as well as the kea... | 04/17/2007 |
| 7157149 | Surface-modified glass-ceramics and their preparation The present invention relates to a product, comprising a body which is delimited by a surface, of a lithium aluminosilicate-based glass-ceramic, as well as to its method of preparation. Characteristically, said glass-ceramic has, on at least one part of said surface... | 01/02/2007 |
| 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 |
| 6703332 | Glass-ceramic for substrate of magnetic disk having higher strength and process for the production of the same A glass-ceramic for substrate of magnetic disks having high strength can be obtained by subjecting to heat treatment a base glass comprising, in terms of weight percent of their oxides, from 65% to 80.0% of SiO2, from 0.5% to 5.0 % of Al2 | 03/09/2004 |
| 6606884 | Sinterable lithium disilicate glass ceramic High-strength sinterable lithium disilicate glass ceramics are described which can be further processed in particular by pressing in the viscous state to shaped dental products.... | 08/19/2003 |
| 6528440 | Glass-ceramic plate and method for making same A glass-ceramic plate based on silicon, aluminum and lithium oxides is intended, in particular, to cover heating elements. The plate has a diffuse transmission factor of at least 50%. A process for manufacturing the plate is provided.... | 03/04/2003 |
| 6506699 | Negative thermal expansion glass ceramic and method for producing the same A negative thermal expansion glass ceramic having a negative coefficient of thermal expansion, which is a sufficiently large absolute value in a temperature range of -40° C. to +160° C. and a method for producing the same are provided. The negative ther... | 01/14/2003 |
| 6420286 | Glass-ceramics A glass-ceramic suitable for use as a light filter includes, as a predominant crystal phase, lithium disilicate (Li2 O.2SiO2) or a combination of lithium disilicate and at least one crystal phase selected from the group consisting of... | 07/16/2002 |
| 6327874 | Method for manufacturing a glass-ceramic substrate for a magnetic information storage medium There is provided a glass-ceramic substrate for a magnetic information storage medium having a data zone and a landing zone capable of stably lifting a magnetic head in the landing zone and also capable of reducing the amount of lifting of the magnetic he... | 12/11/2001 |
| 6209352 | Methods of making negative thermal expansion glass-ceramic and articles made thereby An athernal optical device and a method for producing the device, such as an athermal optical fiber reflective grating, are described. The athermal optical fiber reflective grating device comprises a negative expansion substrate, an optical fiber mounted ... | 04/03/2001 |
| 6197710 | Luminous glass ceramics A luminous glass ceramic comprising, in percent by weight, the following components: SiO2 50-65 (%) P2 O5 0-10 Al2 O3 18-30... | 03/06/2001 |
| 6182472 | Manufacture of glass-ceramic plates having opening(s) of bent perimeter, bent glass-ceramic plates The present invention relates to: a method of bending the perimeter of at least one opening (2) provided in a glass-ceramic precursor plate (1), said perimeter describing a closed curve without sharp angles; a method of manufacturing a glass-ceramic plate... | 02/06/2001 |
| 6174827 | Glass-ceramic substrate for an information storage medium A glass-ceramic substrate for an information storage medium includes, as a predominant crystal phase, lithium disilicate (Li2 O.multidot.2SiO2) or a combination of lithium disilicate and at least one crystal phase selected from the g... | 01/16/2001 |
| 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 |
| 6060412 | Crystalline glass, crystallized glass, crystallized glass article, and process for producing crystallized glass article In order to provide a crystallized glass which can be shaped by the redraw forming and a method of manufacturing a crystallized glass article by the redraw forming, the crystallized glass contains precipitated crystals with a maximum grain size not greate... | 05/09/2000 |
| 6034011 | Glass-ceramic substrate for a magnetic head and a method for manufacturing the same A glass-ceramic substrate for a magnetic head has as its predominant crystal phase a mixed crystal of lithium disilicate (Li2 O.2SiO2) and either or both of -quartz (-SiO2) and -cristobalite (-S... | 03/07/2000 |
| 5968219 | Bent glass-ceramic plate and a method of making glass-ceramic bent plate The invention relates to a method of making glass-ceramic plates which are bent at a radius of curvature especially suitable in the manufacture of cooking plates.... | 10/19/1999 |
| 5962351 | Method of producing ଲ-spodumene bodies Beta-spodumene bodies and method of preparing the bodies that involves providing a uniform plastic batch of inorganic raw materials, organic binder, and vehicle, wherein the inorganic raw materials are composed of, in percent by weight, about 75% to 95% m... | 10/05/1999 |
| 5580363 | Method for detecting a defect in a glass-ceramic for magnetic disks A method for detecting a defect in a glass-ceramic for magnetic disks includes steps of forming a colored glass-ceramic having Munsell value within the range of 0 to 7 in the CIE color system by subjecting to heat treatment a base glass comprising in weig... | 12/03/1996 |
| 5567217 | Method for manufacturing a crystalized glass magnetic disk substrate A magnetic disk substrate is made of a glass-ceramic having crystal phases of lithium disilicate (Li2 O.2SiO2) and alpha-quartz (SiO2). The crystal phase of alpha-quartz is formed of grown crystal grains each having a glob... | 10/22/1996 |
| 5403787 | Extruded ceramic honeycomb and method Extruded low-expansion ceramic honeycombs comprising beta-spodumene solid solution as the principal crystal phase and with less than 7 weight percent of included mullite are produced by compounding an extrusion batch comprising a lithium aluminosilicate g... | 04/04/1995 |
| 5244484 | Process for producing a curved glass plate partially coated with a ceramic A process for producing a curved glass plate, which comprises coating a crystallizable ceramic color composition to a predetermined portion of a glass plate, followed by baking at a temperature of from 500° to 620° C. to fuse the ceramic color compositi... | 09/14/1993 |
| 5232481 | Glass dimensional control using ion exchange This method is directed at a method for making selectively sculptured lithium silicate crystal-containing glass articles. A photonucleable, glass body is selectively exposed to short wave radiation and then heat treated to cause the development of crystal... | 08/03/1993 |
| 5186729 | Method of making in-situ whisker reinforced glass ceramic A heat processing procedure is used to create reinforcing whiskers of TiO2 in glass-ceramic materials in the LAS and MAS family. The heat processing procedure has particular application in creating TiO2 in-situ in a modified ଲ-... | 02/16/1993 |
| 5173453 | Variably translucent glass-ceramic article and method for making This invention is directed toward of a glass-ceramic article consisting essentially, expressed in terms of weight percent on the oxide basis, of about 64-70% SiO2, 18-22% Al2 O3, 3.3-4% Li2 O, 2-5% ZnO, 0-2% MgO... | 12/22/1992 |
| 5102833 | Strengthening glass articles with electromagnetic radiation and resulting product Alkali metal- and alkaline earth metal-oxide aluminosilicate amorphous glass articles can be strengthened by providing such glass with a cerium dioxide sensitizer and a nucleating agent, irradiating the article with electromagnetic radiation, heating the ... | 04/07/1992 |
| 5064460 | Blue transparent glass-ceramic articles This invention is directed to the formation of blue-to-black transparent glass-ceramic articles containing ଲ-quartz solid solution as essentially the sole crystal phase present therein. The articles are prepared by heat treating reduced precursor gl... | 11/12/1991 |
| 5061307 | Crystallized glass having natural-marble-like surface patterns and method of producing the same A crystallized glass having natural-marble-like surface patterns comprising 45 to 75 wt. % of SiO2, 1 to 25 wt. % of Al2 O3, 1 to 20 wt. % of CaO, 0.5 to 17 wt. % of MgO, 0.1 to 18 wt. % of BaO, 0 to 18 wt. % of ZnO, 1 to ... | 10/29/1991 |
| 4976765 | Method of making glass-ceramic laser gyroscope frame This invention provides a method for forming ring laser gyroscope frames without extensive machining. Parts of necessary configurations for such frames are so fashioned that they can be sealed together into a unit. Those parts are prepared from very low e... | 12/11/1990 |
| 4786305 | Heat treatment of flat photochromic sheet glass This invention is directed to a method for heat treating a sheet of a potentially photochromic glass to cause the growth of silver halide crystals therein which impart photochromic properties thereto, wherein the heat treated sheet will be essentially fre... | 11/22/1988 |
| 4747876 | Dental crown material A dental crown formed of a dental crown material comprising crystallized glass containing 40 to 45% by weight of SiO2, 11 to 15% by weight of Al2 O3, 16 to 23% by weight of MgO, 6.5 to 8% by weight of F, 4.0 to 7.0% by wei... | 05/31/1988 |
| 4707458 | Glass-ceramics suitable for ring laser gyros This invention relates to the production of transparent glass-ceramic bodies exhibiting properties especially suitable for use in ring laser gyros. The inventive products contain ଲ-quartz solid solution as essentially the sole crystal phase and cons... | 11/17/1987 |
| 4652534 | High-strength glass ceramic containing apatite crystals and a large quantity of wollastonite crystals and process for producing same Glass ceramic comprising apatite crystals and at least 50% by weight of wollastonite crystals and a process for producing the same are disclosed. The glass ceramic contains from 45 to 56% by weight of CaO, from 1 to less than 10% by weight of P2 | 03/24/1987 |
| 4572611 | Apparatus including an integral optical device An optical apparatus for focusing at least one image and optionally only one image of an object, said apparatus comprising a receiving surface and an optical imaging device between the image and the object to form an image of the object on the receiving s... | 02/25/1986 |
| 4560666 | High strength glass-ceramic containing apatite and alkaline earth metal silicate crystals and process for producing the same A high strength glass-ceramic containing apatite and alkaline earth metal silicate (diopside/forsterite/akermanite) crystals having an excellent affinity for a living body and a process for producing the same are disclosed. The glass-ceramic is useful as ... | 12/24/1985 |
| 4518222 | Optical device and method There is disclosed an improved optical device of the type disclosed in application Ser. No. 520,456 and embodying an array of lenses integral with and raised above a crystalline matrix. The improvement comprises an ion-exchanged surface on the lenses wher... | 05/21/1985 |
