Patents by Inventor Charles S. Holden

Charles S. Holden has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20150194229
    Abstract: A compact neutron generator for power production that includes an electron beam source; a target converter material at which an electron beam from said electron beam source is directed, said target converter material comprising low enriched uranium trihydride; a subcritical fuel assembly; at least one neutron spectrum shaper disposed between said subcritical fuel assembly and said target converter material; and a ceramic hydrogen tight cladding enclosing said target converter material.
    Type: Application
    Filed: January 6, 2014
    Publication date: July 9, 2015
    Inventors: Marlene Kravetz Schenter, Charles S. Holden
  • Publication number: 20150139379
    Abstract: A lightly hydrided/deuterated metallic plutonium-thorium fuel for use in a fast fission pool-type nuclear reactor cooled with liquid metal coolants, including lithium-7 lead eutectic, lead bismuth eutectic or lead. When so used, plutonium-239 is consumed, and merchantable heat is produced along with fissile uranium-233, which can be denatured with uranium-238 and used in light water reactors as fuel.
    Type: Application
    Filed: December 23, 2014
    Publication date: May 21, 2015
    Inventor: Charles S. Holden
  • Patent number: 8917807
    Abstract: A lightly hydrided/deuterated metallic plutonium-thorium fuel for use in a fast fission pool-type nuclear reactor cooled with liquid metal coolants, including lithium-7 lead eutectic, lead bismuth eutectic or lead. When so used, plutonium-239 is consumed, and merchantable heat is produced along with fissile uranium-233, which can be denatured with uranium-238 and used in light water reactors as fuel.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: December 23, 2014
    Inventor: Charles S. Holden
  • Publication number: 20140226774
    Abstract: An actinium-227 production device having a plurality of metallic or ceramic caplets, each enclosing a radium-226 compound in redundantly nested sealed cylinders. The radium-226 compound is compacted into a disk and diluted with heat transporting ceramic materials. A thermal neutron shield including spectrum shaping materials to protect actinium-227 produced from exposure to thermal neutrons is included along with a strong neutron absorber to shape the neutron spectrum such that radium-226 nuclei are exposed to neutrons in the higher epithermal energy groups upon entry into the target with an energy of between 20 eV and 1 KeV.
    Type: Application
    Filed: January 10, 2014
    Publication date: August 14, 2014
    Applicant: THORENCO MEDICAL ISOTOPES LLC
    Inventors: Charles S. Holden, Robert E. Schenter
  • Patent number: 8625731
    Abstract: A neutron generator and isotope production apparatus and method of using the same to produce commercially and medically useful neutrons. The gamma,n reaction produces neutrons in beryllium and deuterium and the spectrum of the neutrons generated is shaped to optimize capture of the neutrons in a gamma emitting isotope. The gammas interact with target materials to produce large quantities of neutrons.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: January 7, 2014
    Inventors: Charles S. Holden, Robert E. Schenter
  • Publication number: 20110268237
    Abstract: A neutron generator and isotope production apparatus and method of using the same to produce commercially and medically useful neutrons. The gamma,n reaction produces neutrons in beryllium and deuterium and the spectrum of the neutrons generated is shaped to optimize capture of the neutrons in a gamma emitting isotope. The gammas interact with target materials to produce large quantities of neutrons.
    Type: Application
    Filed: April 13, 2007
    Publication date: November 3, 2011
    Inventors: Charles S. Holden, Robert e. Schenter
  • Publication number: 20100018347
    Abstract: A method of chemically extracting radium-228, rare earth metals, thorium, the decay products of thorium, and phosphates from thorium-containing ores. The method involves breaking thorium-containing ore into fragments, wetting the fragments with a concentrated strong acid to make a slurry, heating the slurry, passing the heated solution through a first anion exchange column, retaining metals and radium-228 captured on the resin, allowing the radium-228 ions to decay to actinium-228, purifying the actinium-228 fraction, sending the actinium-228 fraction through a capture column, eluting the captured thorium-228 with acid, removing radium from the solution, retaining the radium-228 fraction for isomer in-growth, retaining decay products from the radium-228, separating the REEs from the process stream; and eluting and retaining the REEs.
    Type: Application
    Filed: October 5, 2007
    Publication date: January 28, 2010
    Inventors: Charles S. Holden, Larry A. Burchfield
  • Publication number: 20090274258
    Abstract: A neutron generator and method of using the same to produce commercial and medical isotopes. Isotopes are transmuted using fission spectrum neutrons produced in neutron multiplier alloys proximate a target isotope. The produced neutron fission spectrum is tailored or shaped by alloys disposed between the multiplier alloys and the target isotope. The tailoring alloys selectively convert the neutron fission spectrum to a nearly coherent distribution of selected high energy, fast, epithermal, or thermal neutrons. The tailoring alloys are engineered to slow the fission spectrum neutrons to the resonance energies of the selected target isotopes through scattering or hydriding of selected components of high temperature aluminum alloys that optimize neutron capture in engineered target alloys.
    Type: Application
    Filed: April 13, 2007
    Publication date: November 5, 2009
    Inventors: Charles S. Holden, Robert E. Schenter
  • Publication number: 20080240330
    Abstract: A method and apparatus for directing high energy electrons to a converter material that emits gamma rays, which, in turn interact directly with parent isotopes to produce unstable, short-lived medical isotopes and product isotopes by the gamma, n reaction, or which interact with high-z materials to produce neutrons that then produce valuable isotopes by neutron capture in parent isotopes.
    Type: Application
    Filed: January 16, 2008
    Publication date: October 2, 2008
    Inventor: CHARLES S. HOLDEN
  • Publication number: 20080144762
    Abstract: A set of alloy formulations is disclosed to use with thorium based nuclear fuels in a fast spectrum reactor; with thorium based nuclear fuels in existing thermal spectrum power reactors; for medical isotope production in the epithermal, the fast, the fission spectrum and the thermal spectra; and to use as fuel in test and experimental reactors that are non proliferative. The alloys form inert metal matrixes to hold fine particles of dispersed thorium containing fuel. The formulations also are useful for the production of medical and commercial isotopes in the high energy, fast and epithermal neutron spectra.
    Type: Application
    Filed: March 2, 2006
    Publication date: June 19, 2008
    Inventors: Charles S. Holden, Tak Pul Lou