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| Number | Title | Issue Date |
| 7893377 | Method for concentrating oxygen isotope A method of concentrating the stable oxygen isotopes of 17O and 18O by irradiating ozone with light, selectively dissociating an isotopologue of ozone containing an oxygen isotope in its molecule into oxygen, followed by dissociating the ozone ... | 02/22/2011 |
| 7332080 | Apparatus for salt free water softening A water softening system and process for softening water on an as needed basis is disclosed. The system and process softens water without the addition of a substitute metal exchange cation. ... | 02/19/2008 |
| 7323651 | Method for isotope separation of thallium A method for isotope separation of thallium using a laser beam comprising the steps of: (a) producing photons of a first frequency by a laser system, wherein a wave length of the first frequency is about 378 nm; (b) producing photons of a second frequency by the las... | 01/29/2008 |
| 7307233 | Isotope separation method and working substance for isotope separation The present invention is directed to the provision of an isotope separation method, which can effectively prevent, without the use of a second gas, a secondary reaction and the formation of a polymer involved in a multiphoton dissociation reaction in laser isotope s... | 12/11/2007 |
| 7302812 | Process for production of isotopes A process for producing an isotopically enriched compound of a desired isotope includes (a) providing a cryogenic reaction zone containing a catalyst adapted to catalyze an isotope exchange reaction at a cryogenic reaction temperature, (b) feeding to the cryogenic r... | 12/04/2007 |
| 7276103 | Method and device for separating molecules having different excitation spectra The invention relates to a method for the separation of molecules having different excitation spectra, which form components of a gas. The molecules are excited by laser pulses in a way that the molecules to be separated are transferred into a state of excitation du... | 10/02/2007 |
| 7229535 | Hydrogen bubble reduction on the cathode using double-cell designs An apparatus and method for planarizing a surface of a substrate using a chamber separated into two parts by a membrane, and two separate electrolytes is provided. The embodiments of the present invention generally provide an electrochemical mechanical polishing sys... | 06/12/2007 |
| 7200198 | Recirculating target and method for producing radionuclide An apparatus for producing a radionuclide includes a target chamber, a particle beam source operatively aligned with the target chamber, and a regenerative turbine pump for circulating a target fluid through the target chamber via first and second liquid transports.... | 04/03/2007 |
| 7187744 | Method of providing a nuclear fuel and a fuel element provided by such a method A method for providing a nuclear fuel includes forming a uranium-molybdenum alloy that provides an enhanced reactivity in research, test and radioisotope production nuclear reactors. In this uranium-molybdenum alloy, the uranium is enriched in the isotope 235-U, whi... | 03/06/2007 |
| 7077901 | Process for producing single crystal silicon wafers A process for producing a single crystal silicon wafer, comprising the steps of forming a porous layer on a single crystal silicon substrate comprising a silicon whose concentration of mass number 28 silicon isotope is less than 92.5% on an average; dissolving a sta... | 07/18/2006 |
| 7022229 | Adsorption separation system An apparatus is presented for separating chemicals using adsorption separation methods. The apparatus uses a plurality of adsorption units holding adsorbent, where the adsorption units are serially connected and are moved to shift the relative position of the feeds ... | 04/04/2006 |
| 7018614 | Stabilization of radiopharmaceuticals labeled with 18-F An 18F isotope-labeled FDG radiopharmaceutical is stabilized against degradation in radiochemical purity due to radiolysis using selected amounts of ethyl alcohol that depend on the activity concentration of the 18F with due regard to limits se... | 03/28/2006 |
| 6800827 | Method for efficient laser isotope separation and enrichment of silicon A method for laser-assisted separation and enrichment of silicon isotopes such as 28Si, 29Si and 30Si on the basis of infrared multiple-photon dissociation of silicon halides represented by Si2F6, wherein the si... | 10/05/2004 |
| 6787723 | Method for laser induced isotope enrichment Methods for separating isotopes or chemical species of an element and causing enrichment of a desired isotope or chemical species of an element utilizing laser ablation plasmas to modify or fabricate a material containing such isotopes or chemical species are provid... | 09/07/2004 |
| 6653587 | Laser isotope separation method employing isotopically selective collisional relaxation A method of separating isotopes from polyatomic molecules, in particular 13 C from trifluoromethane HCF3, by applying to the polyatomic molecules in the gas phase two infrared laser beams of different frequencies. The first laser has... | 11/25/2003 |
| 6559402 | Process for separation of low natural concentration isotopes in an electromagnetic separator with ion source A process of separating low natural concentration protons in an electromagnetic separator having an ion source utilizes X-ray spectral analysis to distinguish areas of separated, increased-content of isotope enriched substance so as to treat them separate... | 05/06/2003 |
| 6267850 | Separation of isotopes by ionization Improved processing apparatus and methods are provided which involve the selective ionisation of a feed material and the separation of ionised and non-ionised species. Introduction of a chemical material to cause selective transition to a non-ionised and/... | 07/31/2001 |
| 6203669 | Nuclear waste separator A method and system for separating radioactive waste containing volatiles, into light ions and heavy ions, includes a loader/transporter for transferring the waste into a high vacuum environment in the chamber of a plasma processor. During this transfer, ... | 03/20/2001 |
| 6137073 | Enrichment method for radioactive isotopes In the method of this invention, a radioactive isotope, for example, U238, is placed within a region. High-energy electrons or high-energy photons in the form of X-rays, gamma rays, or laser excitation are applied to the region. This energy is ... | 10/24/2000 |
| 5948214 | Isotope separation A method of isotope separation includes vaporisation and atomising in an evacuated chamber a supply of the element whose isotopes are to be separated to form a stream of atoms of the element in the chamber. The supply which is vaporized includes an involi... | 09/07/1999 |
| 5945649 | Atomic vapor laser isotope separation of lead-210 isotope An isotopically selective laser process and apparatus for removal of Pb-210 from natural lead that involves a one-photon near-resonant, two-photon resonant excitation of one or more Rydberg levels, followed by field ionization and then electrostatic extra... | 08/31/1999 |
| 5827405 | Laser isotope separation by excitation of wavepackets A method for the separation of one isotope from other isotopes in a gaseous mixture of isotopes. First the gaseous mixture of isotopes is non-selectively excited by a laser pulse, so as to form spatially localized wavepackets in the isotopes, which initia... | 10/27/1998 |
| 5505829 | Molecular separation method and apparatus A method and apparatus for separating a gaseous mixture of chemically identical but physically different molecules based on their polarities. The gaseous mixture of molecules is introduced in discrete quantities into the proximal end of a porous glass mol... | 04/09/1996 |
| 5468355 | Method for producing radioisotopes A target is bombarded with high energy particles to generate a radioisotope, and the radioisotope is preferably extracted by one of the following: combusting the target in oxygen, stopping the bombardment and heating the target, or heating the target by i... | 11/21/1995 |
| 5464512 | Method of uranium isotope enrichment by utilizing a photochemically selective effect A method of uranium isotope enrichment by utilizing a photochemically selective effect is provided. The method comprises placing a powder of a uranyl compound of carboxylate having at least one oxygen-containing substituent in a magnetic field, irradiatin... | 11/07/1995 |
| 5443702 | Laser isotope separation of erbium and other isotopes Laser isotope separation is accomplished using at least two photoionization pathways of an isotope simultaneously, where each pathway comprises two or more transition steps. This separation method has been applied to the selective photoionization of erbiu... | 08/22/1995 |
| 5419887 | Separation of the isotopes of boron by chemical exchange reactions The isotopes of boron, 10 B and 11 B, are separated by means of a gas-liquid chemical exchange reaction involving the isotopic equilibrium between gaseous BF3 and a liquid BF3 . donor molecular addition complex ... | 05/30/1995 |
| 5419819 | Self-regenerating column chromatography The present invention provides a process for treating both cations and anions by using a self-regenerating, multi-ionic exchange resin column system which requires no separate regeneration steps. The process involves alternating ion-exchange chromatograph... | 05/30/1995 |
| 5419820 | Process for producing enriched uranium having a 235 U content of at least 4 wt. % via combination of a gaseous diffusion process and an atomic vapor laser isotope separation process to eliminate uranium hexafluoride tails storage An uranium enrichment process capable of producing an enriched uranium, having a 235 U content greater than about 4 wt. %, is disclosed which will consume less energy and produce metallic uranium tails having a lower 235 U content th... | 05/30/1995 |
| 5417943 | Method for producing UO2 or (U/PU)02 powder A method for producing UO2 or (U/Pu)O2 powder includes obtaining ammonium uranyl carbonate or ammonium uranyl plutonyl carbonate by treating a starting oxide selected from the group consisting of uranium oxide, plutonium oxide and ur... | 05/23/1995 |
| 5316635 | Zirconium isotope separation using tuned laser beams A method for selectively photoionizing odd mass Zr atoms. Atomic vapours are subjected to three resonant and are non resonant laser pulses to raise the energy of Zr atoms from the J=2 ground state, to a J=1 first intermediate state, to a J=(second interme... | 05/31/1994 |
| 5314592 | Method for enrichment of oxygen 18 with a laser The present invention relates to a method for enrichment of oxygen 18, which comprises the steps of optionally adding a hydrocarbon to a saturated aliphatic ether other than dimethyl ether and/or a saturated cyclic ether as an oxygen 18-containing startin... | 05/24/1994 |
| 5250231 | Nuclear fuel with isotopically depleted burnable absorber By using AVLIS or other methods capable of providing a depleted isotopic mixture, troublesome isotopes such as Gd154, Gd156 and Er166 are selectively removed from naturally occurring isotopic mixtures, while avoiding the a... | 10/05/1993 |
| 5221446 | Isotope separation process Selection criteria are disclosed for choosing a coreactant RX that will improve the isotope separation in laser-activated chemical reactions which may proceed by the steps: ##STR1## The step of coreactant activation can be important in some exchange ... | 06/22/1993 |
| 5205913 | Process of 196 Hg enrichment A simple rate equation model shows that by increasing the length of the photochemical reactor and/or by increasing the photon intensity in said reactor, the feedstock utilization of 196 Hg will be increased. Two preferred embodiments of the pre... | 04/27/1993 |
| 5202005 | Gadolinium photoionization process A method is provided for selective photoionization of the odd-numbered atomic mass gadolinium isotopes 155 and 157. The selective photoionization is accomplished by circular or linear parallel polarized laser beam energy effecting a three-step photoioniza... | 04/13/1993 |
| 5190667 | Separation of gases and solutes by augmented diffusion in counterflow A method and systems for separating fluids of differing masses from a mixture by enhanced diffusion wherein the method and systems embody at least one cycle wherein the mixture of fluids of differing masses is fed into a first reservoir which is connected... | 03/02/1993 |
| 5174873 | Method of isotope enrichment A method of isotope enrichment including providing a reactant. The reactant is a mixture of at least two isotopic compounds. One of the isotopic compounds has a greater percentage of a selected isotope than the other. An electron transfer agent is introdu... | 12/29/1992 |
| 5131991 | Automated product recovery in a HG-196 photochemical isotope separation process A method of removing deposited product from a photochemical reactor used in the enrichment of 196 Hg has been developed and shown to be effective for rapid re-cycling of the reactor system. Unlike previous methods relatively low temperatures ar... | 07/21/1992 |
| 5130001 | Uranium isotope separation by continuous anion exchange chromatography A simple, low temperature process for separating uranium isotopes and producing substantially pure uranium isotope fractions from a crude uranium isotope-containing aqueous feed stock is provided. A uranium isotope-containing solution is fed to an anion e... | 07/14/1992 |
