Class 62/919 - ISOTOPE

Subclass of Class 62 - Refrigeration
Definition: Subject matter specific to the separation of one isotope
No. of patents: 21
Last issue date: 12/04/2007

Number	Title	Issue Date
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
6461583	Method for enrichment of heavy component of oxygen isotopes A method and apparatus for enrichment of heavy oxygen isotopes is provided wherein an oxygen starting material which contains heavy oxygen isotopes is enriched in at least one of oxygen molecule 16 O17 O, 16 O18...	10/08/2002
6423387	Resilient containers for hyperpolarized gases and associated methods A resilient multi-layer container is configured to receive a quantity of hyperpolarized noble fluid such as gas and includes a wall with at least two layers, a first layer with a surface which minimizes contact-induced spin-relaxation and a first or secon...	07/23/2002
6305190	Polarized gas accumulators and heating jackets and associated gas collection methods and thaw methods and polarized gas products Methods of collecting, thawing, and extending the useful polarized life of frozen polarized gases include heating a portion of the flow path and/or directly liquefying the frozen gas during thawing. A polarized noble gas product with an extended polarized...	10/23/2001
6293111	Process and apparatus for preparing hyperpolarized helium gas at high pressure and application of the process A process for preparing hyperpolarized helium gas at high pressure including optical pumping at a resonant wavelength of about 1083 nanometers a helium gas formed by pure helium-3 isotope or by a mixture of helium-3 and helium-4 isotopes; and subjecting t...	09/25/2001
6282920	Apparatus and method for producing polarized vapor-phase helium-3, particularly for NMR imaging The present invention relates to an apparatus for producing polarized high-pressure vapor-phase helium-3, particularly for NMR imaging. The apparatus comprises a means for injecting helium-3 or a mixture of isotopes into an optical pumping cell (2), a mea...	09/04/2001
6202440	Process and apparatus for separation of stable isotope compound Stable isotope atoms present in the form of stable isotope compounds, for example, 13 C present in the form of 13 CO, are separated by distillation using a distillation column packed orderly with a formed packing, and preferably by d...	03/20/2001
6199385	Polarized gas accumulators and heating jackets and associated gas collection and thaw methods and polarized gas products Methods of collecting, thawing, and extending the useful polarized life of frozen polarized gases include heating a portion of the flow path and/or directly liquefying the frozen gas during thawing. A polarized noble gas product with an extended polarized...	03/13/2001
6128918	Containers for hyperpolarized gases and associated methods A resilient container configured to receive a quantity of hyperpolarized noble gas includes a wall with at least two layers, a first layer with a surface which minimizes spin-relaxation and a first or second layer which is substantially impermeable to oxy...	10/10/2000
6079213	Methods of collecting, thawing, and extending the useful life of polarized gases and associated accumulators and heating jackets Methods of collecting, thawing, and extending the useful polarized life of frozen polarized gases include heating a portion of the flow path and/or directly liquefying the frozen gas during thawing. A polarized noble gas product with an extended polarized...	06/27/2000
5934103	Method and apparatus for production of spin-polarized medical-grade xenon ¹²⁹ gas by laser optical pumping Spin-polarized xenon gas is provided in medical-grade purity for use as a contrast medium in MRI studies by use of collision-induced transfer of spin energy to the xenon gas from laser-pumped spin-polarized Rb gas. The Rb gas is provided by thermally vapo...	08/10/1999
5860295	Cryogenic accumulator for spin-polarized xenon-129 A method and apparatus for accumulation of hyperpolarized 129 Xe is disclosed. The method and apparatus of the invention enable the continuous or episodic accumulation of flowing hyperpolarized 129 Xe in frozen form. The method also ...	01/19/1999
5809801	Cryogenic accumulator for spin-polarized xenon-129 A method and apparatus for accumulation of hyperpolarized 129 Xe is disclosed. The method and apparatus of the invention enable the continuous or episodic accumulation of flowing hyperpolarized 129 Xe in frozen form. The method also ...	09/22/1998
5642625	High volume hyperpolarizer for spin-polarized noble gas A method and apparatus for hyperpolarization of flowing noble gases is disclosed, including means for hyperpolarization of noble gases in a continuous flow arrangement. Noble gases such as xenon-129 and helium-3 can be hyperpolarized using the disclosed m...	07/01/1997
4666480	Separation of gaseous mixtures A gas can be separated by condensation from a gaseous mixture by exposing the mixture to reduced temperature in a chamber having an outlet. The outlet contains a restrictive structure, such as a sintered glass filter disc, on which a thin film of the cond...	05/19/1987
4525186	Method for producing isotopically enriched helium-4 and use of same as nuclear reactor coolant Isotopically enriched helium-4, that is, helium-4 which is low in helium-3, is useful as a nuclear reactor coolant. It is produced from liquefied natural gas source helium by distilling helium-3 therefrom. The coolant is preferably enriched in hydrogen up...	06/25/1985
4474592	Apparatus for producing liquid para-hydrogen The apparatus for preparing liquid para-hydrogen from normal hydrogen has a reservoir for the liquid para-hydrogen. A gas space of the reservoir communicates via a line with the suction side of an ejector. The ejector extracts the para-hydrogen vapor evol...	10/02/1984
4353871	Hydrogen isotope separation A system of four cryogenic fractional distillation columns interlinked with two equilibrators for separating a DT and hydrogen feed stream into four product streams, consisting of a stream of high purity D2, DT, T2, and a tritium-fre...	10/12/1982
4270938	Processes for decontaminating nuclear process off-gas streams In a process for decontaminating a nuclear process off-gas stream, oxygen and oxides of nitrogen are removed by catalytic reaction with hydrogen. The feed gas stream is then passed serially through a drier, a carbon dioxide adsorber and a xenon adsorber t...	06/02/1981
4101375	Isotopically enriched helium-4 Isotopically enriched helium-4, that is to say, helium-4 which is low in helium-3, is useful as a nuclear reactor coolant. It is produced from liquefied natural gas source helium by removing helium-3 therefrom....	07/18/1978
4039411	Isotope separation using vibrationally excited molecules A system for isotope separation or enrichment wherein molecules of a selected isotope type in a flow of molecules of plural isotope types are vibrationally excited and collided with a background gas to provide enhanced diffusivity for the molecules of the...	08/02/1977

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Class 62/919 - ISOTOPE