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| Number | Title | Issue Date |
| 7442660 | Synthetic fire opal A synthetic fire opal having similar physical and chemical properties as natural fire opal. The synthetic fire opal is colored, hard, and transparent. The synthetic fire opal comprises SiO2 and water. ... | 10/28/2008 |
| 7348076 | Single crystals and methods for fabricating same Various single crystals are disclosed including sapphire. The single crystals have desirable geometric properties, including a width not less than about 15 cm and the thickness is not less than about 0.5 cm. The single crystal may also have other features, such as a... | 03/25/2008 |
| 7303699 | Method for producing a scintillator ceramic A method for producing high-density, translucent, scintillator ceramics by way of a pressure-less sintering carried out at an elevated temperature. According to the method, particles of a MOS composition are prepared using a specific wet milling method whereby being... | 12/04/2007 |
| 7264750 | Rare earth silicate single crystal and process for production of rare earth silicate single crystals When produced as a single crystal ingot, a rare earth silicate single crystal 1 can be formed by cutting out from the single crystal ingot. The single crystal 1 has a crystal face F100 whose Miller indices can be determined by X-ray diffraction.... | 09/04/2007 |
| 7253129 | Rare earth garmet sintered compact A rare earth garnet sintered compact which is produced by subjecting a rare earth garnet powder such as YAG to a pre-sintering, sintering the pre-sintered product by HIP, and annealing the sintered product at 1100° C. to 1600° C. in a whole oxygen atmosphere under... | 08/07/2007 |
| 7247589 | Transparent polycrystalline sintered ceramic of cubic crystal structure Transparent polycrystalline sintered ceramic of cubic crystal structure. The invention relates to the field of technical ceramic and relates to transparent polycrystalline sintered ceramics of cubic crystal structure for applications with increased mechanical stress... | 07/24/2007 |
| 7224532 | Optical uses diamondoid-containing materials Novel optical devices based on diamondoid-containing materials are disclosed. Materials that may be fabricated from diamondoids included diamondoid nucleated CVD films, diamondoid-containing CVD films, molecular crystals, and polymerized materials. Devices that may ... | 05/29/2007 |
| 7224766 | CT detector array having non-pixelated scintillator array The present invention is a directed to a non-pixelated scintillator array for a CT detector as well as an apparatus and method of manufacturing same. The scintillator array is comprised of a number of ceramic fibers or single crystal fibers that are aligned in paral... | 05/29/2007 |
| 7153799 | Glass fiber forming compositions Mathematical relationship for ingredients for fiber glass compositions are used to identify properties of the glass. In particular the forming temperature and delta T. In one embodiment, the mathematical relationship of the ingredients is of a generic quaternary SiO... | 12/26/2006 |
| 7144836 | Glass fiber forming compositions Mathematical relationship for ingredients for fiber glass compositions are used to identify properties of the glass. In particular the forming temperature and delta T. In one embodiment, the mathematical relationship of the ingredients is of a generic quaternary SiO... | 12/05/2006 |
| 7135072 | Methods of fabricating silicon carbide crystals Methods for producing silicon carbide crystals, seed crystal holders and seed crystal for use in producing silicon carbide crystals and silicon carbide crystals are provided. Silicon carbide crystals are produced by forcing nucleation sites of a silicon carbide seed... | 11/14/2006 |
| 7087112 | Nitride ceramics to mount aluminum nitride seed for sublimation growth An apparatus and method for fabricating a mount for an aluminum nitride (AlN) seed for single crystal aluminum nitride growth is provided. A holder having a proximal base and wall portions extending therefrom is fabricated from crystal growth crucible material, and ... | 08/08/2006 |
| 7081425 | Aluminum nitride sintered body An aluminum nitride sintered body having an oxygen concentration of not larger than 400 ppm, a metal impurity concentration of not larger than 150 ppm, and a carbon concentration of not larger than 200 ppm, and having an average crystal grain size of 2 μm to 20 μm... | 07/25/2006 |
| 7076020 | Oxide phosphor and radiation detector using it, and X-ray CT device An oxide phosphor includes an oxide consisting of at least Gd, Ce, Al, Ga, and O, and has the crystal structure of a garnet structure, the atomic ratio (Gd+Ce)/(Al+Ga+Gd+Ce) of which is more than 0.375 and 0.44 or less, and the atomic ratio Ce/(Ce+Gd) of which is 0.... | 07/11/2006 |
| 7050470 | Optical waveguides on glass substrates and lasers formed therefrom The invention is directed to optical devices comprising a solid-state structured glass substrate having at least one waveguide incorporated therein, particularly waveguides and lasers incorporating such structure. The invention is also directed to methods for modify... | 05/23/2006 |
| 7033640 | Method of coloring cut gemstones A method of coloring cut gemstones introduces metals or metal oxides into a surface layer by means of heat treatment. During the heat treatment the gemstones are laid on a solid plate and the metals or metal oxides form a substantial constituent of the plate. The su... | 04/25/2006 |
| 7022262 | Yttrium aluminum garnet powders and processing Methods of producing doped and undoped yttrium aluminum garnet and yttrium aluminum perovskite containing powders and the powders produced thereby are provided. Additionally, methods of forming doped and undoped polycrystalline yttrium aluminum garnet having a mean ... | 04/04/2006 |
| 6997014 | Coatings for gemstones and other decorative objects The invention provides a decorative object comprising a transparent or translucent substrate having a body and at least one surface bearing a thin film coating. The coating imparts in the substrate a body color that appears substantially constant at different angles... | 02/14/2006 |
| 6972135 | Texturing of magnetic disk substrates A method for texturing a substrate for a magnetic disk comprises abrading the substrate using nano-sized diamond particles (e.g. having a diameter less than or equal to 20 nm). A magnetic layer is then deposited over the substrate. Even when the texture is extremely... | 12/06/2005 |
| 6969951 | High pressure discharge vessel for an alumina high-intensity discharge lamp A discharge vessel or chamber for a high-intensity discharge lamp is provided, including a central body having a discharge space provided therein, two capillaries closing off respective end openings of the central body and an electrode positioned within each respect... | 11/29/2005 |
| 6967330 | High-density polycrystalline lutetium silicate materials activated with Ce This invention encompasses the oxides of lutetium and silicon in various proportions and containing a dopant, optionally cerium, fabricated in the form of a translucent ceramic, and methods of manufacture and use of such ceramic. ... | 11/22/2005 |
| 6939189 | Method of forming a patterned phosphor structure for an electroluminescent laminate The invention provides a method of forming a patterned phosphor structure having red, green and blue sub-pixel elements for an AC electroluminescent display. The method involves selecting first and second phosphors, each emitting light in different ranges of the vis... | 09/06/2005 |
| 6936557 | Mineral composition and method for manufacturing the same A novel multipurpose mineral composition capable of emitting a large quantity of far infrared rays, negative ions and oxygen heat is manufactured by setting up an iron railing, an iron rod and an iron plate on a brazier, placing a tinfoil on the iron plate, and laye... | 08/30/2005 |
| 6872422 | Process for imparting and enhancement of colours in gemstone minerals and gemstone minerals obtained thereby The present invention provides a process for imparting colors to colorless gemstone/minerals and enhancing properties of gemstone/minerals by coating a thin/thick film of a particular material or multiple films of different materials on polished gemstones/minerals t... | 03/29/2005 |
| 6650489 | Gem identification viewer A gem identifying device using filtered transmitted light for use in distinguishing type-I colorless diamonds from type II colorless diamonds, and natural diamonds and gems from synthetic or treated diamonds and gems.... | 11/18/2003 |
| 6635309 | Process for the color enhancement of gemstones In accordance with the present invention, there are provided methods for enhancing the color of gemstone(s) by subjecting a combination of a gemstone and at least one finely divided form of a selected treating agent including the element copper to a tempe... | 10/21/2003 |
| 6517807 | Preparation of high silica zeolites bound by zeolite and use thereof This invention relates to a process for producing zeolite-bound high silica zeolites and the use of the zeolite-bound high silica zeolite produced by the process for hydrocarbon conversion. The process is carried out by forming an extrudable paste compris... | 02/11/2003 |
| 6511571 | Method for fabricating an optical waveguide A method in which a separate preformed optical material is suitably sized for easy handling, manipulation, and fabrication into a waveguide having a core (formed from the optical material) having transverse cross-sectional dimensions on the order of only ... | 01/28/2003 |
| 6479420 | Ceramics and their power for scintillators, and method for producing same A sintered ceramic for a scintillator having a composition represented by the general formula of Gd3-x Cex Aly Siz Ga5-y-z O12, wherein 0.001ࣘxࣘ0.05, 1ࣘyࣘ4, and 0.0015ࣘzࣘ0.03, i... | 11/12/2002 |
| 6475942 | Conversion of polycrystalline alumina to single crystal sapphire using molybdenum doping A process for converting a polycrystalline ceramic material to a single crystal material includes the steps of doping at least a first portion of the polycrystalline ceramic material with a conversion-enhancing dopant having a +6 valence state in the unfi... | 11/05/2002 |
| 6292315 | Gem identification viewer A gem identifying device using filtered transmitted light for use in distinguishing type-I colorless diamonds from type II colorless diamonds, and natural diamonds and gems from synthetic or treated diamonds and gems.... | 09/18/2001 |
| 6270604 | Method for fabricating an optical waveguide A method in which a separate preformed optical material is suitably sized for easy handling, manipulation, and fabrication into a waveguide having a core (formed from the optical material) having transverse cross-sectional dimensions on the order of only ... | 08/07/2001 |
| 6200917 | Colorless silicon carbide gemstones Large single crystals of silicon carbide are grown in a furnace sublimation system. The crystals are grown with compensating levels of p-type and n-type dopants (i.e., roughly equal levels of the two dopants) in order to produce a crystal that is essentia... | 03/13/2001 |
| 6048813 | Simulated diamond gemstones formed of aluminum nitride and aluminum nitride: silicon carbide alloys Simulated diamond gemstones are produced by faceting and polishing bulk single crystals of colorless synthetic aluminum nitride or aluminum nitride:silicon carbide alloys.... | 04/11/2000 |
| 6025289 | Colorless silicon carbide crystals Large single crystals of silicon carbide are grown in a furnace sublimation system. The crystals are grown with compensating levels of p-type and n-type dopants (i.e., roughly equal levels of the two dopants) in order to produce a crystal that is essentia... | 02/15/2000 |
| 5925310 | Method of making a silicon carbide product A method of making a perforated silicon carbide product in a shorter time and with less labor work to achieve a lower cost and high yield. Openings 13a, 13b are previously formed in a mold 11, and inserts 14 are inserted into the openings to project towar... | 07/20/1999 |
| 5916955 | Diamond-carbon material and method for producing thereof The present invention relates to a diamond-carbon material, containing carbon, hydrogen, nitrogen, oxygen and incombustible impurities of a composition specified in the disclosure, and the surface contains methyl, carboxyl, lactone, aldehyde, ether and qu... | 06/29/1999 |
| 5888918 | Method for enhancing the color of minerals useful as gemstones In accordance with the present invention, there are provided methods for enhancing the color of minerals useful as gemstones. Invention methods are relatively inexpensive to carry out, avoid the use of hazardous materials, and require no specialized equip... | 03/30/1999 |
| 5861349 | Synthetic diamond-containing material and method of obtaining it A diamond-containing material having the following element content ratio in per cent by weight: carbon 75-90, hydrogen 0.6-1.5, nitrogen 1.0-4.5, oxygen the balance, the following phase content ratio in per cent by weight: roentgen amorphous diamond-like ... | 01/19/1999 |
| 5723391 | Silicon carbide gemstones Synthetic gemstones having extraordinary brilliance and hardness are formed from large single crystals of relatively low impurity, translucent silicon carbide of a single polytype that are grown in a furnace sublimation system. The crystals are cut into r... | 03/03/1998 |
