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| Number | Title | Issue Date |
| 6712875 | Method and apparatus for optimized mixing in a common hearth in plasma furnace A method and apparatus for optimized mixing in a common hearth in a plasma furnace. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby the refining hearths and molds define at leas... | 03/30/2004 |
| 6454815 | Alkaline electrochemical capacitor and electrode fabrication A high power density alkaline electrochemical capacitor cell includes a pair of titanium nitride powder electrodes fabricated by subjecting titanium hydride powder to a controlled flow of ammonia vapor. A porous separating membrane for containing an elect... | 09/24/2002 |
| 6113666 | Method of magnetically-controllable, electroslag melting of titanium and titanium-based alloys, and apparatus for carrying out same A method of magnetically-controllable, electroslag melting of titanium and titanium-based alloys is provided that includes the effect of an external radial magnetic field on the metallurgical melt. The field forms at least two adjoining melting layers whi... | 09/05/2000 |
| 6019812 | Subatmospheric plasma cold hearth melting process A plasma cold hearth melting process which provides an ingot of improved properties and including a plasma cold hearth melting furnace operated inside an air-tight chamber containing an inert gas, such as helium, at subatmospheric pressure levels. Raw mat... | 02/01/2000 |
| 6004368 | Melting of reactive metallic materials Method and apparatus for melting reactive metallic materials, such as for example titanium base alloys and other reactive alloys, by selective and sequential induction heating of a plurality of solid alloy charge components segregated in a refractory melt... | 12/21/1999 |
| 6001495 | High modulus, low-cost, weldable, castable titanium alloy and articles thereof An improved high-modulus, low-cost, castable, weldable titanium alloy and a process for making such an alloy is provided. In general, titanium is alloyed with about 0.75 weight percent iron and about 8 weight percent aluminum to result in an alloy with a ... | 12/14/1999 |
| 5984999 | Apparatus having gas-actuated pump and charge well and method of melting metal therewith charge a well of a metal-melting furnace The charge well of a metal melting furnace is provided with an internal cavity having a circular cross section when viewed from the top, preferably a cavity of cylindrical or conical configuration, and with a peripheral exit port located tangentially with... | 11/16/1999 |
| 5972065 | Purification of tantalum by plasma arc melting Purification of tantalum by plasma arc melting. The level of oxygen and carbon impurities in tantalum was reduced by plasma arc melting the tantalum using a flowing plasma gas generated from a gas mixture of helium and hydrogen. The flowing plasma gases o... | 10/26/1999 |
| 5968224 | Recovery of titanium values from titanium grinding swarf by electric furnace smelting A method for the recovery of valuable materials from titanium grinding swarf is provided comprising the steps of sieving the accumulated titanium grinding swarf to remove unwanted coarse trash and grinding wheel fragments, pelletizing, and smelting in an ... | 10/19/1999 |
| 5910621 | Treatment of titaniferous materials A process for facilitating the removal of impurities e.g. radionuclides, such as uranium and thorium, and/or one or more of their radionuclide daughters, from titaniferous material includes contacting the titaniferous material with one or more reagents at... | 06/08/1999 |
| 5788736 | Recovery of titanium values from titanium grinding swarf by electric furnace smelting A method for the recovery of valuable materials from titanium grinding swarf is provided comprising the steps of sieving the accumulated titanium grinding swarf to remove unwanted coarse trash and grinding wheel fragments, pelletizing, and smelting in an ... | 08/04/1998 |
| 5772724 | High purity titanium production process The present invention provides a method for producing high-purity titanium from titanium sponge obtained by the Kroll process in which a core of the cylindrical lump of titanium sponge obtained with a weight less than 20-30% of that of the cylindrical lum... | 06/30/1998 |
| 5578109 | Treatment of titaniferous materials A process for facilitating the removal of impurities e.g. radionuclides, such as uranium and thorium, and/or one or more of their radionuclide daughters, from titaniferous material includes contacting the titaniferous material with one or more reagents at... | 11/26/1996 |
| 5462647 | Preparation of lead-zirconium-titanium film and powder by electrodeposition A process for the preparation of lead-zirconium-titanium (PZT) film and powder compositions. The process comprises the steps of providing an electrodeposition bath, providing soluble salts of lead, zirconium and titanium metals to this bath, electrically ... | 10/31/1995 |
| 5336378 | Method and apparatus for producing a high-purity titanium A sputtering target for forming a thin film consisting of high-purity titanium, in which the content of alkali metal is 0.1 ppm or less, the content of radio active elements is 1 ppb or less, and the oxygen content is 100 ppm or less, and, further, the ba... | 08/09/1994 |
| 5174971 | Continuous anion exchange chromatography for the separation of zirconium isotopes The thermal neutron capture cross-section of zirconium may be altered by altering its natural isotope distribution through a steady state chromatographic separation of these isotopes using an anion exchange resin as the stationary phase of the chromatogra... | 12/29/1992 |
| 5147451 | Method for refining reactive and refractory metals A process is disclosed for recovering high purity refractory product metal such as titanium, hafnium, zirconium, vanadium, niobium or their alloys from the regulus of a reduction reaction mixture of a by-product metal halide, excess reducing metal and pro... | 09/15/1992 |
| 5112493 | Zirconium-hafnium production in a zero liquid discharge process A simple, low cost continuous process for separating and purifying zirconium and hafnium which eliminates liquid waste and facilitates the management of RCRA and LLW wastes is provided. An aqueous zirconium and hafnium--containing feed solution is prepare... | 05/12/1992 |
| 5110566 | Chromatographic separation of zirconium isotopes with reduced waste liquor The isotopes of zirconium can be partially or completely separated by loading an aqueous solution of an ionic compound of zirconium onto a cationic exchange resin with pentavalent phosphorus derived active groups which serves as the stationary phase of a ... | 05/05/1992 |
| 5098678 | Chromatographic separation of zirconium isotopes The isotopes of zirconium can be partially or completely separated by loading an aqueous solution of an ionic compound of zirconium onto a cationic exchange resin which serves as the stationary phase of a chromatograph, eluting the compound with an aqueou... | 03/24/1992 |
| 5080859 | Process for hardening sponge refractory metals and pressing to form a shape A process for hardening sponge refractory metal and making it more susceptible to crushing by the addition of oxygen and/or nitrogen gas to either the reduction stage of the production of the metal from a tetrachloride thereof with magnesium, or to the tr... | 01/14/1992 |
| 5078789 | Continuous vacuum distillation and furnace therefor A vacuum distillation furnace and method for removing unreacted magnesium metal and magnesium chloride from a sponge refractory metal, such as zirconium, utilizes a vertically arranged series of mutually isolated distillation vessels in respective furnace... | 01/07/1992 |
| 5071472 | Induction slag reduction process for purifying metals A continuous method is provided for purifying and recovering transition metals such as neodymium and zirconium that become reactive at temperatures above about 500° C. that comprises the steps of contacting the metal ore with an appropriate fluorinating... | 12/10/1991 |
| 5062887 | Process for chloride removal from sponge metal A sponge refractory metal product, especially a zirconium metal sponge, that retains a residual quantity of magnesium chloride following subjection to an initial, conventional, distillation cycle is reprocessed by the addition of virgin magnesium in amoun... | 11/05/1991 |
| 4985069 | Induction slag reduction process for making titanium Continuous process for preparing titanium comprising fluorinating titanium ore, and reducing the formed alkaline earth fluotitanate with an alkaline earth metal in an induction slag reactor.... | 01/15/1991 |
| 4919191 | Molten-metal forming method and apparatus which are bottom-loading, bottom-pouring and bottom-unloading The bottom of a solid metal charge melts to fill a form below the charge. During melting, usually, the metal that enters the form remains continuous with an unused solid part of the charge. After cooling, the formed metal is removed together with the unus... | 04/24/1990 |
| 4828814 | Process for purification of solid material A process is disclosed for producing a solid material which, in some cases, may have a resultant purity of 99.999% or better which comprises contacting the solid material at a temperature approaching the melting point of the solid material with a purifyin... | 05/09/1989 |
| 4793854 | Highly pure titanium and process for producing the same Disclosed is a highly pure titanium which comprises containing not more than 200 ppm of oxygen; not more than 30 ppm each of elements consisting of iron, nickel and chromium, and not more than 0.1 ppm each of elements consisting of sodium and potassium. D... | 12/27/1988 |
| 4749409 | Method of purifying refractory metal A method of purifying refractory metal, comprising: providing a distillation space, said space comprising both a heatable portion and a condensation portion in communication with each other, and being closed but provided with gas inlet- and gas outlet ope... | 06/07/1988 |
| 4711664 | Process for producing zirconium sponge with a very low iron content A process for distilling zirconium sponge in an iron containing vessel at a temperature sufficiently low to preclude iron contamination of said sponge is disclosed. A distillation temperature near about 934° C. is sufficiently low to minimize iron contam... | 12/08/1987 |
| 4710481 | Method for melting Ti or a high-Ti alloy in CaO refractories Ti or a high-Ti alloy is melted in a container composed of high-purity CaO materials on its inner sides. The materials are composed of not less than 99% by weight of CaO, not more than 0.1% by weight of SiO2, not more than 0.02% by weight of Fe... | 12/01/1987 |
| 4368072 | Iodide cell vapor pressure control A method of controlling the vapor pressure inside of an iodide decomposition vessel or apparatus for an iodide decomposition process by directly measuring the pressure inside the cell and adjusting the temperature of the lid of the cell. Zirconium and haf... | 01/11/1983 |
| 4243411 | Reduction of metal sulfides A method for the recovery of a desired metal (e.g., copper) from its sulfide ore by reaction with process metal (e.g., aluminum) capable of forming at least a high sulfide and subsulfide compound. The aluminum subsulfide compound is reacted with the coppe... | 01/06/1981 |
| 4239531 | Sponge ring feed for iodide crystal bar cells Using a self-supporting metal sponge ring compact in an Iodide Crystal Bar Cell, as opposed to a loose fill. The sponge ring is formed by compressing the metal into a self supporting sponge ring by any means including isostatic pressing or conventional ra... | 12/16/1980 |
