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| Number | Title | Issue Date |
| 7452483 | Yellow-emitting phosphor blend for electroluminescent lamps A phosphor blend for an electroluminescent lamp is described that comprises a green-emitting electroluminescent phosphor and a red-emitting photoluminescent phosphor, the blend exhibiting an x color coordinate from 0.220 to 0.350 and a y color coordinate from 0.450 ... | 11/18/2008 |
| 7300492 | Ammonium dodecamolybdomolybdate and method of making A novel molybdenum compound, ammonium dodecamolybdomolybdate (AMM), is described which may be used in the manufacture of molybdenum metal and molybdenum carbide powders. The molybdenum compound is a dodecaheteropoly acid salt having a Keggin-type structure wherein m... | 11/27/2007 |
| 7291291 | Electroluminescent phosphor powder with D50 value of less than 12 μm and method of making There is presented an electroluminescent phosphor powder of copper-activated zinc sulfide particles that has a size distribution with a D50 value of less than 12 μm, and more preferably less than 10 μm. The powder is preferably made by a method that includes the s... | 11/06/2007 |
| 7041151 | Electrochemical displacement-deposition method for making composite metal powders An electrochemical displacement-deposition method for making composite metal powders is described. The method is carried out by combining tungsten or molybdenum metal particles with particles of silver oxide or copper oxide in an aqueous hydroxide solution. Heat is ... | 05/09/2006 |
| 6793907 | Ammonium dodecamolybdomolybdate and method of making A novel molybdenum compound, ammonium dodecamolybdomolybdate (AMM), is described which may be used in the manufacture of molybdenum metal and molybdenum carbide powders. The molybdenum compound is a dodecaheteropoly acid salt having a Keggin-type structure wherein m... | 09/21/2004 |
| 6051196 | Purification of phosphorus containing scheelite ore A method for purifying a phosphorus containing scheelite ore is described wherein the calcite phase is selectively dissolved prior to dissolution of the apatite phase. Selective dissolution of the calcite produces several benefits: (1) a usable calcium so... | 04/18/2000 |
| 5819158 | Reclamation of tungsten values from tungsten-thoria A simple, cost effective method for reclaiming tungsten values from tungsten-thoria has been invented. The method involves reacting the tungsten-thoria with molten sodium hydroxide to form a soluble sodium tungstate and an insoluble residue of thoria, coo... | 10/06/1998 |
| 5788938 | Recovery of tungsten from ferrotungsten A method is provided whereby tungsten values are recovered from ferrotungsten by completely oxidizing the ferrotungsten at high temperatures in an oxygen atmosphere followed by digestion with sodium hydroxide to form soluble sodium tungstate. The sodium t... | 08/04/1998 |
| 5164171 | Removal of carbonate from caustic sulfide solution In the manufacture of ammonium paratungstate, sulfide is added to a tungsten-containing solution in order to precipitate molybdenum sulfide. Volatiles, including sulfides, evolved during this process are collected in a caustic scrubbing solution. The sulf... | 11/17/1992 |
| 5154757 | Method of making pure cobalt metal powder substantially free of divalent cationic impurities A method for producing pure cobalt metal powder involves the removal of divalent cationic impurities from a trivalent hexamine cobalt chloride solution. This solution is then decomposed to an insoluble cobalt oxide-containing material, from which pure cob... | 10/13/1992 |
