Patents Represented by Attorney Judson R. Hightower
  • Patent number: 4878442
    Abstract: An improved method for removing nitrogen oxides from concentrated waste gas streams, in which nitrogen oxides are ignited with a carbonaceous material in the presence of substoichiometric quantities of a primary oxidant, such as air. Additionally, reductants may be ignited along with the nitrogen oxides, carbonaceous material and primary oxidant to achieve greater reduction of nitrogen oxides. A scrubber and regeneration system may also be included to generate a concentrated stream of nitrogen oxides from flue gases for reduction using this method.
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: November 7, 1989
    Assignee: The United States of America as represented by the Department of Energy
    Inventors: James T. Yeh, James M. Ekmann, Henry W. Pennline, Charles J. Drummond
  • Patent number: 4878652
    Abstract: An improved plug valve wherein a novel shape for the valve plug and valve chamber provide mating surfaces for improved wear characteristics. The novel shape of the valve plug is a frustum of a body of revolution of a curved known as a tractrix, a solid shape otherwise known as a peudosphere.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: November 7, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: John J. Wordin
  • Patent number: 4879086
    Abstract: A neutron reactivity control system for a LWBR incorporating a stationary seed-blanket core arrangement. The core arrangement includes a plurality of contiguous hexagonal shaped regions. Each region has a central and a peripheral blanket area juxapositioned an annular seed area. The blanket areas contain thoria fuel rods while the annular seed area includes seed fuel rods and movable thoria shim control rods.
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: November 7, 1989
    Assignee: The United States of America as represented by The United States Department of Energy
    Inventors: Robert G. Luce, Daniel F. McCoy, Floyd C. Merriman, Steve Gregurech
  • Patent number: 4879262
    Abstract: A self-sustaining combustion synthesis process for producing hard, tough, lightweight B.sub.4 C/TiB.sub.2 composites is based on the thermodynamic dependence of adiabatic temperature and product composition on the stoichiometry of the B.sub.4 C and TiB.sub.2 reactants. For lightweight products the composition must be relatively rich in the B.sub.4 C component. B.sub.4 C-rich composites are obtained by varying the initial temperature of the reactants. The product is hard, porous material whose toughness can be enhanced by filling the pores with aluminum or other metal phases using a liquid metal infiltration process. The process can be extended to the formation of other composites having a low exothermic component.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: November 7, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Danny C. Halverson, Beverly Y. Lum, Zuhair A. Munir
  • Patent number: 4879472
    Abstract: Method and apparatus for detecting and differentiating organic compounds based on their electron affinity. An electron capture detector cell (ECD) is operated in a plurality of multiplexed electroncially programmable operating modes to alter the detector response during a single sampling cycle to acquire multiple simultaneous chromatograms corresponding to each of the different operating modes. The cell is held at a constant subatmospheric pressure while the electron collection bias voltage applied to the cell is modulated electronically to allow acquisition of multiple chromatograms for a single sample elution from a chromatograph representing three distinctly different response modes.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: November 7, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Marcus B. Wise, Michelle V. Buchanan
  • Patent number: 4877736
    Abstract: A chlorinated aliphatic hydrocarbon-degrading microorganism, having American Type Culture Collection accession numbers ATCC 53570 and 53571, in a biologically pure culture aseptically collected from a deep subsurface habitat and enhanced, mineralizes trichloroethylene and tetrachloroethylene to HCl, H.sub.2 O and Co.sub.2 under aerobic conditions stimulated by methane, acetate, methanol, tryptone-yeast extract, propane and propane-methane.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: October 31, 1989
    Assignee: The United States of Americal as represented by the United States Department of Energy
    Inventor: Carl B. Fliermans
  • Patent number: 4876032
    Abstract: High-temperature electrically conducting polymers. The in situ reactions: AgNO.sub.3 +RCHO.fwdarw.AG.sup.0 +RCOOH and R.sub.3 M.fwdarw.M.sup.0 3R, where M=Au or Pt have been found to introduce either substantial bulk or surface conductivity in high-temperature polymers. The reactions involving the R.sub.3 M were caused to proceed thermally suggesting the possibility of using laser means for initiating such reactions in selected areas or volumes of the polymeric materials. The polymers successfully investigated to date are polyphenylquinoxaline, polytolylquinoxaline, polyquinoline, polythiazole, and pyrrone.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: October 24, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Raimond Liepins, Betty S. Jorgensen, Leila Z. Liepins
  • Patent number: 4876688
    Abstract: A systematic approach to the production of frequency conversion crystals is described in which a chiral molecule has attached to it a "harmonic generating unit" which contributes to the noncentrosymmetry of the molecule. Certain preferred embodiments of such harmonic generating units include carboxylate, guanadyly and imidazolyl units. Certain preferred crystals include L-arginine fluoride, deuterated L-arginine fluoride, L-arginine chloride monohydrate, L-arginine acetate, dithallium tartrate, ammonium N-acetyl valine, N-acetyl tyrosine and N-acetyl hydroxyproline. Chemical modifications of the chiral molecule, such as deuteration, halogenation and controlled counterion substitution are available to adapt the dispersive properties of a crystal in a particular wavelength region.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: October 24, 1989
    Assignee: The United States of America as represented by the Secetary of the Department of Energy
    Inventors: Francis Wang, Stephan P. Velsko
  • Patent number: 4875467
    Abstract: A support and maneuvering apparatus is disclosed for a solar energy receiving device adpated for receiving and concentrating solar energy and having a central axis extending through the center thereof. The apparatus includes a frame for mounting the perimeter of said solar energy receiving device. A support member extends along the central axis of the receiving device and has a base end passing through the center of the receiving device and an outer distal end adapted for carrying a solar energy receiving and conversion mechanism. A variable tension mechanism interconnects the support member with the frame to provide stiffening for the support member and the frame and to assist in the alignment of the frame to optimize the optical efficiency of the solar energy receiving device. A rotatable base is provided, and connecting members extend from the base for pivotable attachment to the frame at spaced positions therealong.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: October 24, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Lawrence M. Murphy
  • Patent number: 4876080
    Abstract: A method for producing hydrogen from coal is described wherein high temperature steam is brought into contact with coal in a pulverizer or fluid energy mill for effecting a steam-carbon reaction to provide for the generation of gaseous hydrogen. The high temperature steam is utilized to drive the coal particles into violent particle-to-particle contact for comminuting the particulates and thereby increasing the surface area of the coal particles for enhancing the productivity of the hydrogen.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: October 24, 1989
    Assignee: The United States of Americal as represented by the United States Department of Energy
    Inventor: Leland E. Paulson
  • Patent number: 4876115
    Abstract: A gas reaction fuel cell may be provided with a solid polymer electrolyte membrane. Porous gas diffusion electrodes are formed of carbon particles supporting a catalyst which is effective to enhance the gas reactions. The carbon particles define interstitial spaces exposing the catalyst on a large surface area of the carbon particles. A proton conducting material, such as a perfluorocarbon copolymer or ruthenium dioxide contacts the surface areas of the carbon particles adjacent the interstitial spaces. The proton conducting material enables protons produced by the gas reactions adjacent the supported catalyst to have a conductive path with the electrolyte membrane. The carbon particles provide a conductive path for electrons. A suitable electrode may be formed by dispersing a solution containing a proton conducting material over the surface of the electrode in a manner effective to coat carbon surfaces adjacent the interstitial spaces without impeding gas flow into the interstitial spaces.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: October 24, 1989
    Assignee: United States Department of Energy
    Inventor: Ian D. Raistrick
  • Patent number: 4874600
    Abstract: The invention relates to a new radiolabeled imaging agent, no-carrier-added [1-.sup.11 C]putrescine, and to the use of this very pure material as a radiotracer with positron emission tomography for imaging brain tumors. The invention further relates to the synthesis of no-carrier-added [1-.sup.11 C]putrescine based on the Michael addition of potassium .sup.11 C-labeled cyanide to acrylonitrile followed by reduction of the .sup.11 C-labeled dinitrile. The new method is rapid and efficient and provides radiotracer with a specific activity greater than 1.4 curies per millimol and in a purity greater than 95%.
    Type: Grant
    Filed: April 17, 1986
    Date of Patent: October 17, 1989
    Assignee: The United States of America as Represented by the United States Department of Energy
    Inventors: Daniel W. McPherson, Joanna S. Fowler, Alfred P. Wolf
  • Patent number: 4874946
    Abstract: A method and apparatus is disclosed for obtaining and mapping chemical compositional data for solid devices. It includes a SIMS mass analyzer or similar system capable of being rastered over a surface of the solid to sample the material at a pattern of selected points, as the surface is being eroded away by sputtering or a similar process. The data for each point sampled in a volume of the solid is digitally processed and indexed by element or molecule type, exact spacial location within the volume, and the concentration levels of the detected element or molecule types. This data can then be recalled and displayed for any desired planar view in the volume.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: October 17, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Lawrence L. Kazmerski
  • Patent number: 4873482
    Abstract: A microvertex particle detector for use in a high energy physic collider including a plurality of parallel superconducting thin film strips separated from a superconducting ground plane by an insulating layer to form a plurality of superconducting waveguides. The microvertex particle detector indicates passage of a charged subatomic particle by measuring a voltage pulse measured across a superconducting waveguide caused by the transition of the superconducting thin film strip from a superconducting to a non-superconducting state in response to the passage of a charged particle. A plurality of superconducting thin film strips in two orthogonal planes plus the slow electromagnetic wave propogating in a superconducting transmission line are used to resolve N.sup.2 ambiguity of charged particle events.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: October 10, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Kenneth E. Gray
  • Patent number: 4872905
    Abstract: Submicron size particles are produced by using a sputtering process to deposit particles into a liquid. The liquid is processed to recover the particles therefrom, and the particles have sizes in the range of twenty to two hundred Angstroms. Either metallic or non-metallic particles can be produced, and the metallic particles can be used in "metallic inks".
    Type: Grant
    Filed: May 11, 1988
    Date of Patent: October 10, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Roy S. Bourne, Clarence C. Eichman, William W. Welbon
  • Patent number: 4873218
    Abstract: The polycondensation of resorcinol with formaldehyde under alkaline conditions results in the formation of surface functionalized polymer "clusters". The covalent crosslinking of these "clusters" produces gels which when processed under supercritical conditions, produce low density, organic aerogels (density .ltoreq.100 mg/cc; cell size .ltoreq.0.1 microns). The aerogels are transparent, dark red in color and consist of interconnected colloidal-like particles with diameters of about 100 .ANG.. These aerogels may be further carbonized to form low density carbon foams with cell size of about 0.1 micron.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: October 10, 1989
    Assignee: The United States Department of Energy
    Inventor: Richard W. Pekala
  • Patent number: 4873444
    Abstract: Detection of surface impurity phases in high-temperature superconducting materials. Thermally stimulated luminescence has been found to occur in insulating impurity phases which commonly exist in high-temperature superconducting materials. The present invention is sensitive to impurity phases occurring at a level of less than 1% with a probe depth of about 1 .mu.m which is the region of interest for many superconductivity applications. Spectroscopic and spatial resolution of the emitted light from a sample permits identification and location of the impurity species. Absence of luminescence, and thus of insulating phases, can be correlated with low values of rf surface resistance.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: October 10, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: D. Wayne Cooke, Muhammad S. Jahan
  • Patent number: 4871527
    Abstract: There is disclosed radioligands labeled with the position emitting radionuclide [.sup.18 F] suitable for dynamic study in living humans with position emission transaxial tomography. These new [.sup.18 F]-N-fluoroalkylspiroperidols, wherein the alkyl group contains from 2-6 carbon atoms, exhibit extremely high affinity for the dopamine receptors and provide enhanced uptake and retention in the brain concomitant with reduced radiation burden. These characteristics all combine to make these new radioligands useful for mapping dopamine receptors in normal and disease states in the living brain. Additionally, a new synthetic procedure for these radioligands as well as a new procedure for preparing the radiolabeled alkyl halide alkylating reagents are also disclosed.
    Type: Grant
    Filed: April 29, 1987
    Date of Patent: October 3, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Chyng-Yann Shiue, Alfred P. Wolf, Lan-Qin Bai, Ren-Tui Teng
  • Patent number: 4869625
    Abstract: A combination drilling and skiving tool including a longitudinally extending hollow skiving sleeve slidably and concentrically mounted on a right-handed twist drill. Dogs or pawls provided on the internal periphery of the skiving sleeve engage with the helical grooves of the drill. During a clockwise rotation of the tool, the drill moves downwardly and the sleeve translates upwardly, so that the drill performs a drilling operation on a workpiece. On the other hand, the drill moves upwardly and the sleeve translates downwardly, when the tool is rotated in a counter-clockwise direction, and the sleeve performs a skiving operation. The drilling and skiving operations are separate, independent and exclusive of each other.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: September 26, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: William J. Stone
  • Patent number: H689
    Abstract: A fuel pin for a liquid metal nuclear reactor is provided. The fuel pin includes a generally cylindrical cladding member with metallic fuel material disposed therein. At least a portion of the fuel material extends radially outwardly to the inner diameter of the cladding member to promote efficient transfer of heat to the reactor coolant system. The fuel material defines at least one void space therein to facilitate swelling of the fuel material during fission.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: October 3, 1989
    Assignee: The United States of America as reprsented by the United States Department of Energy
    Inventors: David W. Christiansen, Richard A. Karnesky, Robert D. Leggett, Ronald B. Baker