Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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 |
| 7837969 | Method of making large-volume CaFsingle crystals for optical elements with an optic axis parallel to the (100)-or (110)-crystal axis and CaF single crystal made thereby The method of making a single crystal, especially a CaF2 single crystal, includes tempering, in which the crystal is heated at | 11/23/2010 |
| 7829058 | Process for the purification of (hydro) halocarbons A process for treating a composition comprising one or more desired (hydro)halocarbons and one or more undesired sulphur containing impurities so as to reduce the concentration of at least one undesired sulphur containing impurity, the process comprising contacting ... | 11/09/2010 |
| 7569206 | Group III nitride compositions The present invention provides compositions and a novel high-yielding process for preparing high purity Group III nitrides. The process involves heating a Group III metal and a catalytic amount of a metal wetting agent in the presence of a nitrogen source. Group III... | 08/04/2009 |
| 7534412 | Large-volume CaFsingle crystals with reduced scattering and improved laser stability, and uses thereof Single crystals with low scattering, small refractive index differences and few small angle grain boundaries have a bi-directional scattering distribution function value (BSDF) of less than 1.5*10−6 or 5*10−7. ... | 05/19/2009 |
| 7404943 | Methods for solubilizing and recovering fluorinated compounds Methods of enhancing the solubility of a fluorinated compound in an organic solvent are provided. In one embodiment, carbon dioxide gas pressure is applied to the solvent at a pressure effective to enhance the solubility of the fluorinated compound. The method may f... | 07/29/2008 |
| 7390335 | Nanostructured bioactive materials prepared by spray drying techniques Nano-particles of calcium and phosphorous compounds are made in a highly pure generally amorphous state by spray drying a weak acid solution of said compound and evaporating the liquid from the atomized spray in a heated column followed by collection of the precipit... | 06/24/2008 |
| 7364715 | As-grown single crystal of alkaline earth metal fluoride A single crystal of alkaline earth metal fluoride is produced by a single crystal pulling method, has a straight barrel part diameter of not less than 17 cm, preferably has a straight barrel part length of not less than 5 cm, and has a light transmittance, as measur... | 04/29/2008 |
| 7361325 | Methods for making XF•nHOcompounds A substantially dried XF•nH2O2 product is produced by method(s) wherein a feed solution comprised of (i) a XF composition wherein X is K, Na+ or NH4+ and n is an integer from 1 to 3, (ii) hydrogen peroxide (H | 04/22/2008 |
| 7294291 | Ceramicrete stabilization of U-and Pu-bearing materials A method of stabilizing nuclear material is disclosed. Oxides or halides of actinides and/or transuranics (TRUs) and/or hydrocarbons and/or acids contaminated with actinides and/or TRUs are treated by adjusting the pH of the nuclear material to not less than about 5... | 11/13/2007 |
| 7175878 | Cold antireflection layer deposition process The invention concerns a method for making an antiglare stack by vacuum evaporation on an organic substrate (1) at a temperature lower than 150° C., comprising steps which consist in depositing at least a layer of material having a refractive index different... | 02/13/2007 |
| 7102032 | Purification of amide compound In the synthesis of an amide compound through reaction of an acyl fluoride group-bearing compound with an amino compound, a reaction mixture contains the amide compound and hydrogen fluoride or a hydrofluoric acid amine salt. The amide compound is recovered in high ... | 09/05/2006 |
| 7063823 | Depleted UFprocessing plant and method for processing depleted UF A depleted UF6 processing plant including a first fluidized bed reactor configured to react depleted UF6 with steam to produce UO2F2 and hydrogen fluoride, a second fluidized bed reactor connected to the first fluidized be... | 06/20/2006 |
| 7033563 | Method for reducing oxygen component and carbon component in fluoride A method for reducing oxygen and carbon components in high-purity fluoride such as calcium fluoride and barium fluoride (a high-purity fluoride that is not limited to calcium fluoride and barium fluoride), or in rare-earth fluorides such as ytterbium fluoride and ce... | 04/25/2006 |
| 7022303 | Single-crystal-like materials Polycrystalline materials of macroscopic size exhibiting Single-Crystal-Like properties are formed from a plurality of Single-Crystal Particles, having Self-Aligning morphologies and optionally ling morphology, bonded together and aligned along at least one, and up ... | 04/04/2006 |
| 7014703 | Method for annealing group IIA metal fluoride crystals The invention is directed to a method for processing and annealing metal fluoride single crystals. Among other steps, the method includes of removing the as-grown surfaces of the crystals after they emerge from the growth furnace, processing the surfaces in such way... | 03/21/2006 |
| 7001458 | Process for growing of optical fluorite single crystals The present invention relates to the technical field of preparing artificial calcium fluoride (optical fluorite) single crystals by growing from a melt by the directed crystallization and by using a seed crystal. The aim of the invention is to obtain oriented single... | 02/21/2006 |
| 6989060 | Calcium fluoride crystal and method and apparatus for using the same A calcium fluoride crystal produced in accordance with a method for producing calcium fluoride crystal on the basis of refining a raw material of calcium fluoride and causing crystal growth of the refined calcium fluoride, the method including a process of raising a... | 01/24/2006 |
| 6929784 | Chlorotrifuorine gas generator system A ClF3 gas generation system is provided with supply sources of chlorine (3) (for example a cylinder of compressed chlorine) and fluorine (4) (for example a fluorine generator) connected into a gas reaction chamber (2) enabling genera... | 08/16/2005 |
| 6841141 | System for in-situ generation of fluorine radicals and/or fluorine-containing interhalogen (XFn) compounds for use in cleaning semiconductor processing chambers A system for in-situ generation of fluorine radicals and/or fluorine-containing interhalogen compounds XFn (wherein X is Cl, Br, or I, and n is an odd integer). Such system comprises a fluorine source, a halogen source for supplying halogen species other ... | 01/11/2005 |
| 6806039 | Photolithographic element blank calcium strontium fluoride UV transmitting mixed fluoride crystal with minimized spatial dispersion The invention provides a UV below 200 nm lithography method utilizing mixed calcium strontium fluoride crystals. The invention includes providing a below 200 nm radiation source for producing | 10/19/2004 |
| 6758977 | Purification of phosphoric acid plant pond water A process for the partial purification of contaminated phosphoric acid plant pond water is described, in which the pond water is treated sequentially, with two basic compounds, clarified, aged, clarified again and re-acidified. The thus treated pond water, still con... | 07/06/2004 |
| 6723139 | Method for recycling fine calcium fluoride powder Process for recycling a composition comprising pulverulent calcium fluoride in the form of micrometric particles comprising: (i) a stage of mixing, in the presence of water, the said composition with pulverulent calcium fluoride (also known as natural spar), ... | 04/20/2004 |
| 6676914 | Phosphate acidulation utilizing HF acid Phosphoric acid, essentially free from impurities, is prepared by reacting aqueous hydrofluoric acid with phosphate in particles of calcium bearing phosphate rock to form a calcium fluoride pseudomorph solid from which filter-grade phosphoric acid is sepa... | 01/13/2004 |
| 6669920 | Below 160NM optical lithography crystal materials and methods of making The present invention provides below 160 nm optical lithography crystal materials for VUV optical lithography systems and processes. The invention provides fluoride optical lithography crystals for utilization in 157 nm optical microlithography elements w... | 12/30/2003 |
| 6666973 | Method for fixing fluorine and phosphorus in waste water containing fluorophosphoric acid-derived compound to remove them A method is provided for fixing and eliminating fluorine and phosphorus in waste water wherein the waste water includes a fluorophosphate compound in which hydrochloric acid is added to the waste water including the fluorophosphate compound. The waste wat... | 12/23/2003 |
| 6649326 | Photolithographic method and UV transmitting fluoride crystals with minimized spatial dispersion The invention provides a UV below 200 nm lithography method. The invention includes providing a below 200 nm radiation source for producing | 11/18/2003 |
| 6630117 | Making a dispersion managing crystal The present invention provides fluoride lens crystals for VUV optical lithography systems and processes. The invention provides a barium fluoride optical lithography crystal for utilization in 157 nm optical microlithography elements which manipulate belo... | 10/07/2003 |
| 6596252 | Recycling of spent pot linings A process is described for the treatment of spent pot lining material from electrolyte reduction cells, this spent material having a substantial content of cryolite. The spent material is first leached with water at a dilution and a time sufficient to dis... | 07/22/2003 |
| 6592832 | Method for producing highly pure lithium salts A process for preparing a high purity lithium salt from lithium carbonate comprises steps A to D as defined hereinbelow: A: treating a mixture comprising lithium carbonate and water by means of CO2 to obtain an aqueous mixture comprising lithium bic... | 07/15/2003 |
| 6524546 | Process for making calcium chlorides A new process for producing calcium chloride and other metal halides from the carbonates, bicarbonates, oxides of these metals. The process utilizes the discovery that hydrogen halides, when used in a true or conventional fluidizing medium in shallow beds... | 02/25/2003 |
| 6507020 | Halide compound mass spectrometry method and mass spectrometry apparatus A mass spectrometry apparatus is provided with an emitter for emitting metal ions, a reaction chamber where the detected gas is introduced and ionized by the metal ions, an aperture for guiding molecules of the ionized detected gas, and a mass spectromete... | 01/14/2003 |
| 6488769 | Fluoride refining method and fluoride crystal manufacturing method, and optical part and aligner using same In order to provide a fluoride refining method and a fluoride crystal manufacturing method that have great general-purpose properties and can reduce the manufacturing cost and to provide at a low cost a fluoride crystal, an optical part and an aligner the... | 12/03/2002 |
| 6458333 | Process for recycling alkali metal fluorides and/or difluorides The invention relates to a process for recovering alkali metal fluorides and/or difluorides from waste mixtures containing alkali metal chlorides and/or alkali metal fluorides and/or difluorides and, optionally, organic compounds, by (a) subjecting a wast... | 10/01/2002 |
| 6451274 | Depleted UF6 processing plant and method for processing depleted UF6 The object of the present invention is to simplify the depleted UF6 processing plant and processing method and to prevent calcium fluoride to be a fine powder, wherein the processing plant comprises a first fluidized bed reactor for forming UO | 09/17/2002 |
| 6428764 | Process for the production of calcium fluoride A process is disclosed for producing calcium fluoride. The process comprises (a) mixing phosphate rock with aqueous H2 SiF6 at ambient temperature for at least one hour; (b) nucleating the calcium fluoride in the slurry prepared in s... | 08/06/2002 |
| 6409978 | Method of removing impurities from mineral concentrates A process for removing impurities contained in the crystal lattice of minerals, comprising the steps of forming a mixture of a mineral capable of structurally reorganizing its crystal lattice which contains an impurity in its crystal lattice and a halogen... | 06/25/2002 |
| 6355221 | Process for removing soluble fluoride from a waste solution containing the same The present invention relates to a process for recovery of particulate calcium fluoride from a waste solution containing soluble fluoride. More specifically, the invention relates to a process for removal of soluble fluoride from and recovery of fluorspar... | 03/12/2002 |
| 6342312 | Calcium fluoride crystal, optical article and exposure apparatus for photo-lithography using the same A calcium fluoride crystal in which the light transparency does not deteriorate with consecutive irradiation by high output short wavelength light over long time periods. A calcium fluoride crystal in accordance with the present invention has an internal ... | 01/29/2002 |
| 6309618 | Method for treating exhaust gas containing fluorine-containing interhalogen compound, and treating agent and treating apparatus A treating method comprising contacting a fluorine-containing interhalogen compound first with a treating agent for the fluorine component and then with a treating agent for the halogen component, treating agents therefor, and a method for treating exhaus... | 10/30/2001 |
| 6296773 | Removal of boron and fluoride from water A process for reducing boron and/or fluoride ion content of water. Feed water is contacted, in the presence of magnesium, with an alkaline hydroxide to produce treated water and a magnesium precipitate containing boron and fluorine. The precipitate is sep... | 10/02/2001 |
