Famous Patents
Pong, the Atari creation that launched the computer game craze, came with these instructions: "Avoid missing ball for high score."
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7598194 | Oxynitride powder and production method thereof It is aimed at providing an oxynitride powder, which is suitable for usage as a phosphor, is free from coloration due to contamination of impurities, and mainly includes a fine α-sialon powder. An oxynitride powder is produced by applying a heat treatment in... | 10/06/2009 |
| 7368076 | Method for producing a silicon nitride filter A method for producing a silicon nitride filter, which comprises heat-treating in nitrogen a green body comprising from 60 to 95 mass % of metal silicon particles having an average particle diameter of from 10 to 75 μm, wherein particles having particle diameters o... | 05/06/2008 |
| 7294596 | Sintered ceramic material with improved properties and method for its manufacturing A sintered ceramic material comprises a crystalline phase and an intergranular phase comprising a glass phase. The material is manufactured from a starting powder being mixed with an additive comprising one or more metal from a group of Li, Na, Mg, Ca, Sr, Ba, Sc, Y... | 11/13/2007 |
| 7132061 | Electroconductive silicon nitride based composite sintered body and method for preparation thereof A conductive silicon nitride composite sintered body having an average grain size of 100 nm or less and whose relative roughness (Ra) after electric discharge machining is 0.3 μm or less can be obtained by grinding/mixing a silicon nitride powder and a metal powder... | 11/07/2006 |
| 7098159 | Articles for casting applications comprising ceramic composite and methods for making articles thereof A refractory article for use in casting operations wherein said article is subject to prolonged contact with molten metal of at least 1500° C. for at least three hours, said article comprises a ceramic composite consisting essentially of about 10 to about 40 wt. % ... | 08/29/2006 |
| 7094717 | SiAlON containing ytterbium and method of making A method for making a crystallized ceramic body containing a two phase composite comprising an alpha prime SiAlON phase that contains ytterbium and a beta prime SiAlON phase, the process includes the steps of: blending together a starting powder mixture that upon de... | 08/22/2006 |
| 7074346 | Sialon-based oxynitride phosphor, process for its production, and use thereof An α-sialon-based oxynitride phosphor characterized in that the content of α-sialon represented by the general formula: MxS12−(m+n)Al(m+n)OnN16−n:Lny (wherein M is at least one metal selected fr... | 07/11/2006 |
| 7049256 | SiAlON containing ytterbium and method of making A SiAlON ceramic body made from a starting powder mixture that includes silicon nitride powder, and one or more powders that provide aluminum, oxygen, nitrogen and ytterbium to the SiAlON ceramic. The SiAlON ceramic body includes a two phase composite comprising alp... | 05/23/2006 |
| 7037418 | Wear and thermal resistant material produced from super hard particles bound in a matrix of glassceramic electrophoretic deposition A substrate coated with a deposited composite comprising uniformly dispersed hard martial particles in a glassceramic matrix. The deposited bulk composite may comprise uniformly dispersed hard material particles in a glassceramic matrix or hard material particles un... | 05/02/2006 |
| 6964933 | SiAlON containing ytterbium and method of making A SiAlON material that includes a two phase composite of an alpha prime SiAlON phase and a beta prime SiAlON phase. The alpha prime phase contains ytterbium. The alpha prime SiAlON phase being present in an amount between about 25 weight percent and about 85 weight ... | 11/15/2005 |
| 6776927 | Oxynitride phosphor activated by a rare earth element, and sialon type phosphor An oxynitride phosphor activated by a rare earth element, represented by the formula CaxSi12−(m+n)Al(m+n)OnN16−n: EuyDyz, wherein stabilizing metal (Ca) is substituted partially by Eu o... | 08/17/2004 |
| 6777360 | Ceramic material, method of producing same, and formed product thereof A ceramic material suitable for use in production of paving tiles, construction tiles, flooring in offices, flooring in machinery plants and so forth is obtained by a method comprising steps of mixing defatted bran derived from rice bran with a thermosetting resin b... | 08/17/2004 |
| 6689202 | Molds for the manufacture of a dental restoration and methods of making dental restorations Blocks of material are prepared in a variety of shapes and sizes to be used in the fabrication of models for dental restorations. The material comprises a partially sintered ceramic material. The blocks are used to manufacture molds using CAD/CAM methods ... | 02/10/2004 |
| 6674233 | Illumination unit having at least one LED as light source An illumination unit having at least one LED as light source, the LED emitting primary radiation in the range from 300 to 430 nm, this radiation being completely converted into longer-wave radiation by phosphors which are exposed to the primary radiation ... | 01/06/2004 |
| 6632379 | Oxynitride phosphor activated by a rare earth element, and sialon type phosphor A sialon type phosphor in the form of a powder comprising at least 40 wt % of -sialon represented by the formula (Cax,My)(Si,Al)12 (O,N)16 (where M is at least one metal selected from the group consisting... | 10/14/2003 |
| 6589899 | Spinel type sialon, spinel type silicon oxynitride and methods for producing their powders A high pressure phase spinel type sialon represented by the chemical formula Si6-x Alx Ox N8-x (0 | 07/08/2003 |
| 6558821 | Ceramic sinter, and wear resistant member and electronic component member using thereof In ceramic sinter consisting of at least one kind selected from a group consisting of silicon nitride, zirconia, silicon carbide, cermet, SIALON, aluminum nitride and alumina, wear resistant member and electronic component member using thereof, skewness a... | 05/06/2003 |
| 6458732 | Lightweight dry refractory A dry refractory composition having superior insulating value. The dry refractory composition also may have excellent resistance to molten metals and slags. The composition includes filler lightweight material, which may be selected from perlite, vermicul... | 10/01/2002 |
| 6300265 | Molybdenum disilicide composites Molybdenum disilicide/ଲ'-Si6-z Alz Oz N8-z, wherein z=a number from greater than 0 to about 5, composites are made by use of in situ reactions among -silicon nitride, molybdenum disilicide, and alum... | 10/09/2001 |
| 6139791 | Method of making in-situ toughened alpha prime SiAlon-based ceramics A method for making an alpha prime SiAlON-based ceramic article, including the steps of providing an admixture of starting materials and densifying said admixture. The admixture includes: beta silicon nitride; a source of aluminum selected from the group ... | 10/31/2000 |
| 6110853 | Modified composite silicon nitride powders for thermal coating technologies and process for their production The invention concerns the field of ceramics and relates to modified composite silicon nitride powders as used, for example, for coating highly stressed components. It is the aim of the invention to provide modified composite silicon nitride powders and a... | 08/29/2000 |
| 6066583 | Process for the production of ceramic materials A process for the production of ' or ଲ'SiAlON from a starting mixture of silicon metal and clay, wherein the process includes heating the mixture in a flowing nitrogen, or nitrogen containing, atmosphere to a temperature sufficient to react t... | 05/23/2000 |
| 6043176 | Wear and thermal shock resistant SiAlON cutting tool material A sintered ceramic material for high speed machining of heat resistant alloys is provided comprising SiAlON grains and 0.2-20 v/o intergranular phase. At least 80 v/o of said SiAlON phase is beta SiAlON having a z-value greater than 1.0, but less than 1.5... | 03/28/2000 |
| 6040256 | Method for producing a reaction sintered ceramic A method for producing a reaction sintered ceramic, including forming a green sheet by mixing an Si powder and an oxide including Al and O. A ceramic fiber can be added to the green sheet. The green sheet is reaction sintered and oxidized to yield a ceram... | 03/21/2000 |
| 5990026 | Method of producing a surface modified sialon composite A sialon composite and fabrication method thereof in which the phase of a surface layer thereof is modified differently from that of the bulk. The surface layer is modified to -sialon or -ଲ sialon composite but the bulk is ଲ-sial... | 11/23/1999 |
| 5925585 | Materials formed by refractory grains bound in a matrix of aluminum nitride or sialon containing titanium nitride The invention relates to refractory materials that may be used in iron and steel metallurgy comprising, in % by weight: A! 32 to 87% of particles and/or grains of at least one refractory material, the melting temperature and thermal dissociation temperature of... | 07/20/1999 |
| 5925584 | Boron nitride-toughened single phase silicon aluminum oxynitride composite, article and method of making same Multiphase ceramic composites containing single phase silicon aluminum oxynitride and boron nitride wherein the boron nitride is one phase in the composite and the single phase silicon aluminum oxynitride is the matrix phase in the composite. The boron ni... | 07/20/1999 |
| 5891815 | Silica, boron nitride, aluminum nitride, alumina composite, article and method of making same Multiphase ceramic composites containing 47% to 52% by weight aluminum nitride, 23% to 27% by weight silica, 3% to 7% alumina and the balance boron nitride wherein the boron nitride is one phase in the composition and the reaction products of aluminum nit... | 04/06/1999 |
| 5851943 | Ceramic production process A process for the production of O'--SIALON ceramics from silicon metal, nitrogen and clay, the process comprising heating the silicon metal and the clay in a flowing nitrogen atmosphere to a temperature sufficient to react the components to form O'--SIALO... | 12/22/1998 |
| 5834389 | Ceramic material The invention is directed to a silicon oxynitride ceramic material characterised by the following relative intensities and d spacings for the most intense X-ray powder diffraction peaks: ______________________________________ dÅ ... | 11/10/1998 |
| 5814573 | Production of sialon A process is described for preparing ଲ'-sialon comprising heating a mixture of particles comprising from 70% to 90% by weight of particles of an aluminosilicate material and from 30% to 10% by weight of particles of a carbonaceous material at a temp... | 09/29/1998 |
| 5783509 | Process for preparing a refractory powder from spent contact masses issuing from the production of silanes, and to refactory products obtained therefrom The invention relates to a process for the preparation, by nitriding, of a refractory powder containing more than 40% of silicon nitride from spent contact masses issuing from chlorosilane synthesis. The process involves mixing with the copper-free spent ... | 07/21/1998 |
| 5767026 | Silicon nitride ceramic and process for forming the same There are provided a process for forming a silicon nitride sintered body, encompassing a sialon sintered body, by making much of the superplasticity of the sintered body intact as a simple material without formation thereof into a composite material, and ... | 06/16/1998 |
| 5720919 | Al2 O3 and Y2 O3 containing silicon nitride having high mechanical strength at high temperatures A method of making a shaped part of sintered silicon nitride is disclosed which includes preparing a mixture of Si3 N4 having a BET specific surface area in the range of from 2 to 15 m2 /g, having an O2 content ... | 02/24/1998 |
| 5643842 | Low-friction ceramics The present invention provides a low-friction ceramic having a lowered coefficient of friction and an enhanced strength. The ceramic comprises as the matrix phase a nonoxide ceramic containing silicon, such as Si3 N4 or SiC and an ir... | 07/01/1997 |
| 5622905 | Silicon nitride based sintered body Discloses a silicon nitride based sintered body composed only of uniform, fine crystal grains, and improved in both strength and fracture toughness in the middle and low temperature ranges. A crystalline silicon nitride powder composed of crystal grains w... | 04/22/1997 |
| 5616527 | Composite ceramic A composite ceramic is produced by forming a mixed powder of Si and a compound oxide as the starting material into a formed material, nitriding and firing the formed material to form a sinter, and subjecting the sinter to oxidation treatment. The composit... | 04/01/1997 |
| 5605871 | Process of produciing sintered materials based on Si3 N4 /BN using Si-B-N component The present invention relates to a process for the production of sintered materials comprising BN, sintering additives and at least one compound selected from the group consisting of Si3 N4 and SiAlON, wherein the BN component is pre... | 02/25/1997 |
| 5567353 | Method for dispersing ceramic material in an aqueous medium A method for dispersing ceramic materials in aqueous media is disclosed. The method uses water-soluble polymers as dispersants and may be used for dispersing various classes of ceramic materials, including oxide, carbide, and nitride ceramics. The method ... | 10/22/1996 |
| 5552353 | Process for producing advanced ceramics A process for the synthesis of homogeneous advanced ceramics such as SiC+AlN, SiAlON, SiC+Al2 O3, and Si3 N4 +AlN from natural clays such as kaolin, halloysite and montmorillonite by an intercalation and heat tr... | 09/03/1996 |
