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| Number | Title | Issue Date |
| 5021401 | Integrated production of superconductor insulation for chemical vapor deposition of nickel carbonyl This is a process for fabrication of nickel-oxide insulation on a superconductor. The process utilizes; reacting oxygen-free nickel powder with oxygen-free carbon monoxide generally at 50°-75° C. to produce a nickel carbonyl, separating the nickel carbo... | 06/04/1991 |
| 4934610 | Method of comminuting reactive metals A reactive metal such as zirconium, hafnium, and titanium is subjected to comminution in a closed chamber containing a non-reactive gas modified by the addition of preferably somewhat less than one volume percent of water vapor.... | 06/19/1990 |
| 4934569 | Pressurized fluid injection method and means A pressurized fluid is injected into a mass of material through at least one length of hose or other tubing of inherently resilient, elastomer material having one end closed and provided with at least one series of potential openings cut into the elastome... | 06/19/1990 |
| 4933154 | Production of ZrO2 powder of very fine particle size A ZrO2 powder of very fine particle size adapted especially for the making of high density ceramics is produced by chlorinating a zirconium source material, such as zircon sand, to produce crude ZrCl4 solids; the solids are dissolved... | 06/12/1990 |
| 4927468 | Process for making a martensitic steel alloy fuel cladding product This is a very narrowly defined martensitic steel alloy fuel cladding material for liquid metal cooled reactors, and a process for making such a martensitic steel alloy material. The alloy contains about 10.6 wt. % chromium, about 1.5 wt. % molybdenum, ab... | 05/22/1990 |
| 4923579 | Electrochemical process for zirconium alloy recycling A major cost component for zirconium alloy manufacture and fabrication is metal scrap generation during fabrication. This scrap, which has already incurred the entire process conversion cost from zircon sand to metal refining, constitutes an expensive cos... | 05/08/1990 |
| 4923577 | Electrochemical-metallothermic reduction of zirconium in molten salt solutions This is a method of reducing zirconium chloride to a metal product by introducing zirconium chloride into a molten salt bath containing at least one alkali metal chloride and at least one alkaline earth metal chloride; and electrochemically reducing alkal... | 05/08/1990 |
| 4916108 | Catalyst preparation using supercritical solvent A process for producing supported metal catalysts having increased catalytic activity is provided. This process includes the steps of forming a high surface area porous support of a suitable porous material such as alumina or zirconia, dissolving a salt o... | 04/10/1990 |
| 4913778 | Molten salt scrubbing of zirconium or hafnium tetrachloride Removal of aluminum and iron impurities is accomplished using an absorbing column containing potassium or sodium chloride, producing an aluminum and iron chloride-rich bottoms product and purified Zr(Hf)Cl4 vapor at the top of the column. This ... | 04/03/1990 |
| 4913884 | Uranium-preextraction in zirconium/hafnium separations process This is an improvement to a process for making zirconium metal from uranium-containing zircon ore. The process being improved is of the type which utilizes a fluidized bed carbochlorination process of the zircon ore in which uranium chloride is volatilize... | 04/03/1990 |
| 4904341 | Selective silicon dioxide etchant for superconductor integrated circuits This is an improved method for providing silicon dioxide with openings which expose contact pad areas for connections to superconductor in the preparation of superconducting integrated circuits. It relates to the type of method which utilizes depositing o... | 02/27/1990 |
| 4904980 | Refractory resistors with etch stop for superconductor integrated circuits This is a structure of, and method for preparation of, molybdenum resistors in a superconductor integrated circuit. It utilizes a pattern superconductor film; applying an aluminum film on the patterned superconductor film; and then applying a molybdenum f... | 02/27/1990 |
| 4900536 | Preparation of precursors for yttrium-containing ceramic superconductors This is a process for making precursors for ceramic superconductor. It utilizes fluidized bed chlorination of a rare earth ore (e.g. xenotime or monazite) a separation of yttrium chloride by differential condensation at 725°-1200° C. and reaction with a... | 02/13/1990 |
| 4874475 | Molten salt extractive distillation process for zirconium-hafnium separation Improvements are described to a process in which the extractive distillation separation of zirconium or hafnium may be accomplished using mixtures of fused alkali metal or alkali metal and alkaline earth chlorides as the solvent. The solvent composition i... | 10/17/1989 |
| 4873072 | Recovery of hafnium values from loaded extraction solvent In the production of a highly pure hafnium oxide by calcination of a highly pure hafnium hydroxide, the production of a highly pure hafnium hydroxide from a hafnium-loaded, methyl isobutyl ketone solvent that is substantially free of zirconium and sulfate... | 10/10/1989 |
| 4870824 | Passively cooled catalytic combustor for a stationary combustion turbine A catalytic combustor unit for a stationary combustion turbine includes a substrate composed of a plurality of intersecting walls defining a series of generally parallel passages aligned in rows and columns, open at their opposite ends and exposed to a he... | 10/03/1989 |
| 4865693 | Preparation of complexes of zirconium and hafnium tetrachlorides with phosphorus oxychloride This is a zirconium-hafnium separation process utilizing a complex of zirconium-hafnium chlorides and phosphorus oxychloride. The complex is introduced into a distillation column and a hafnium chloride enriched stream is taken from the top of the column a... | 09/12/1989 |
| 4865694 | Electrochemical decomposition of complexes of zirconium or hafnium This is an improved method for separating hafnium from zirconium of the type where a complex of zirconium and hafnium chlorides and phosphorus oxychloride is prepared from zirconium-hafnium chloride and the complex is introduced into a distillation column... | 09/12/1989 |
| 4865696 | Recovery of metal chlorides from their complexes by molten salt displacement This is a process for removing phosphorus oxychloride from a complex of zirconium or hafnium chloride and phosphorus oxychloride utilizing a lithium-potassium chloride molten salt absorber vessel displacing phosphorous oxychloride from the complex, with a... | 09/12/1989 |
| 4865695 | Preparation of complexes of zirconium and hafnium tetrachlorides with phosphorus oxychloride This is a method for molten salt systems related to distillation for zirconium-hafnium separation and prevents buildup of iron chloride by electrochemically reducing iron from the molten salt to give very low levels of iron chloride in the distillation co... | 09/12/1989 |
| 4859879 | Superconducting digital logic amplifier This is a superconducting digital logic amplifier for interfacing superconductor circuits with semiconductor circuits. It provides a gigahertz amplifier to convert low voltage superconducting logic signals to higher voltage signals, suitable for semicondu... | 08/22/1989 |
| 4849016 | Combined ultra slow electron beam and vacuum arc melting for barrier tube shell material This is a process for making a very pure and very homogeneous zirconium material for use in lining the interior of zirconium alloy fuel element cladding. The improvement utilizes the forming of consumable feed material from generally virgin sponge materia... | 07/18/1989 |
| 4849013 | Combined electron beam and vacuum arc melting for barrier tube shell material This is a process for making a very pure and very homogeneous material for use in lining the interior of zirconium alloy fuel element cladding. The improvement utilizes the forming of a consumable electrode from generally virgin sponge material, melting t... | 07/18/1989 |
| 4817857 | Process for restricted lead content soldering of copper with controlled copper contamination of the molten solder reservoir This is a process which provides the first essentially continuous high tin flow soldering method for attaching copper-based fins to non-copper-based tubing. This invention avoids sludge buildup in the reservoir and generally avoids lead carbonate formatio... | 04/04/1989 |
| 4816214 | Ultra slow EB melting to reduce reactor cladding This is a process for producing material for lining reactor fuel element claddings. Rather than using unalloyed zirconium, this invention provides for an alloy liner for the cladding. The process uses ultra-slow electron beam melting of zirconium, to give... | 03/28/1989 |
| 4816215 | Ultrapure zirconium-tin liner material This is a material for lining reactor fuel element cladding. Rather than using unalloyed zirconium, this invention utilized for a 0.1-4% tin alloy liner for the cladding. The very low metallic impurities to reduce solid solution strengthening and second p... | 03/28/1989 |
| 4814136 | Process for the control of liner impurities and light water reactor cladding This is a process for producing material for lining reactor fuel element claddings. Rather than using unalloyed zirconium, this invention provides for an alloy liner for the cladding. The process uses electron beam melting of zirconium, to give very low m... | 03/21/1989 |
| 4812149 | Hot inert gas purging for filter blowback process A filter cleaning process for filters for separating particulates from a hot gas stream using hollow, tubular filter elements. Blowback and hot purge gas systems provide for cleaning of the filter elements and maintenance of the blowback system clear of t... | 03/14/1989 |
| 4754542 | Process of fabricating spar-type consumable electrode for vacuum arc melting of zirconium or titan alloys with wedged-on segment This is an improved electrode for consumable vacuum arc melting of zirconium and titanium alloys, for alloys containing a low melting point alloying material or for very low oxygen zirconium. Electrodes of this type use a low resistance spar extending sub... | 07/05/1988 |
| 4749448 | Zirconium and hafnium tetrachloride separation by extractive distillation with molten zinc chloride calcium and/or magnesium chloride solvent This is a molten salt extractive distillation process for separating hafnium from zirconium. It utilizes at least principally a ZnCl2 --Ca/MgCl2 molten salt solvent, and preferably ZnCl2 --Ca/MgCl2 in a near 95-... | 06/07/1988 |
| 4738747 | Process for etching zirconium metallic objects A process for etching zirconium metallic articles using an aqueous bath of hydrofluoric acid and nitric acid wherein the active hydrofluoric and nitric acid contents of the bath are determined by measurement of the dissolved zirconium content of the bath,... | 04/19/1988 |
| 4737244 | Zirconium and hafnium tetrachloride separation by extractive distillation with molten zinc chloride lead chloride solvent This is a molten salt extractive distillation process for separating hafnium from zirconium. It utilizes at least principally a ZnCl2 -PbCl2 molten salt solvent, and preferably ZnCl2 -PbCl2 in a near eutectic or... | 04/12/1988 |
| 4728507 | Preparation of reactive metal hydrides Transition metal, notably zirconium alloy, is melted (e.g., by a plasma) to form droplets within the size range of minus 20, plus 60 mesh. The droplets are exposed to a hydrogen atmosphere for a short period while cooling through the hydriding temperature... | 03/01/1988 |
| 4726181 | Method of reducing nox emissions from a stationary combustion turbine Hydrocarbon fuel is combusted in a combustion turbine by a method which produces NOx emmissions below an ultra-low standard. In the method, first, a mix of hydrocarbon fuel and air in a primary flow thereof is burned in a primary combustion zon... | 02/23/1988 |
| 4722827 | Zirconium and hafnium with low oxygen and iron This is a high quality zirconium or hafnium sponge, a fuel element cladding liner having material of the quality of this sponge and a process utilizing this quality sponge to fabricate liner material for lined fuel element cladding. The sponge contains 25... | 02/02/1988 |
| 4717428 | Annealing of zirconium based articles by induction heating Processes for the rapid alpha annealing of zirconium based articles are described. These processes utilize induction heating to rapidly heat a worked zirconium based article to an elevated temperature after which it is then cooled. Time at the selected el... | 01/05/1988 |
| 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 |
| 4700863 | Seal welded cast iron nuclear waste container This invention identifies methods and articles designed to circumvent metallurgical problems associated with hermetically closing an all cast iron nuclear waste package by welding. It involves welding nickel-carbon alloy inserts which are bonded to the ma... | 10/20/1987 |
| 4689279 | Composite containing nickel-base austenitic alloys A solid solution, nonmagnetic, austenitic nickel base alloy class is described. It contains: about 12 to 21 weight percent chromium; a concentration of molybdenum and/or tungsten, such that the sum of the weight percent molybdenum and one third the weight... | 08/25/1987 |
| 4668287 | Process for producing high purity zirconium and hafnium This is a process for producing high quality zirconium or hafnium sponge. It is especially useful for producing the very high purity zirconium which may be used to line the inner surface zirconium of Zircaloy tubing for nuclear fuel rods. The process uses... | 05/26/1987 |
