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| Number | Title | Issue Date |
| 4840816 | Method of fabricating optical waveguides by ion implantation doping A method for fabricating high-quality optical waveguides in optical quality oxide crystals by ion implantation doping and controlled epitaxial recrystallization is provided. Masked LiNbO3 crystals are implanted with high concentrations of Ti do... | 06/20/1989 |
| 4838098 | Contained radiological analytical chemistry module A system which provides analytical determination of a plurality of water chemistry parameters with respect to water samples subject to radiological contamination. The system includes a water sample analyzer disposed within a containment and comprising a s... | 06/13/1989 |
| 4839133 | Target and method for the production of fission product molybdenum-99 A target for the reduction of fission product Mo-99 is prepared from uranium of low U-235 enrichment by coating a structural support member with a preparatory coating of a substantially oxide-free substrate metal. Uranium metal is electrodeposited from a ... | 06/13/1989 |
| 4837936 | Underwater measuring gage A device for remotely measuring the diameter of wire rope. The device includes a linear variable differential tansducer, a mechanism to guide and clamp the rope in relation to the anvil of the transducer, an elongated handle for manually manipulating the ... | 06/13/1989 |
| 4838989 | Laser-driven fusion etching process The surfaces of solid ionic substrates are etched by a radiation-driven chemical reaction. The process involves exposing an ionic substrate coated with a layer of a reactant material on its surface to radiation, e.g. a laser, to induce localized melting o... | 06/13/1989 |
| 4839339 | Superconductor precursor mixtures made by precipitation method Method and apparatus for preparing highly pure homogeneous precursor powder mixtures for metal oxide superconductive ceramics. The mixes are prepared by instantaneous precipitation from stoichiometric solutions of metal salts such as nitrates at controlle... | 06/13/1989 |
| 4835395 | Continuous aqueous tritium monitor An apparatus for a selective on-line determination of aqueous tritium concentration is disclosed. A moist air stream of the liquid solution being analyzed is passed through a permeation dryer where the tritium and moisture and selectively removed to a pur... | 05/30/1989 |
| 4834497 | Fiber optic fluid detector Particular gases or liquids are detected with a fiber optic element (11, 11a to 11j) having a cladding or coating of a material (23, 23a to 23j) which absorbs the fluid or fluids and which exhibits a change of an optical property, such as index of refract... | 05/30/1989 |
| 4831846 | Low temperature cryoprobe A portable, hand held probe usable within a small confine to produce a point source of nitrogen or helium at a relatively constant temperature of 77 degrees Kelvin.... | 05/23/1989 |
| 4831965 | Fabrication of solid oxide fuel cell by electrochemical vapor deposition In a high temperature solid oxide fuel cell (SOFC), the deposition of an impervious high density thin layer of electrically conductive interconnector material, such as magnesium doped lanthanum chromite, and of an electrolyte material, such as yttria stab... | 05/23/1989 |
| 4829828 | Pressure transducer A pressure transducer suitable for use in high temperature environments includes two pairs of induction coils, each pair being bifilarly wound together, and each pair of coils connected as opposite arms of a four arm circuit; an electrically conductive ta... | 05/16/1989 |
| 4827773 | Measuring alignment of loading fixture An apparatus and method for measuring the alignment of a clevis and pin type loading fixture for compact tension specimens include a pair of substantially identical flat loading ligaments. Each loading ligament has two apertures for the reception of a res... | 05/09/1989 |
| 4829020 | Substrate solder barriers for semiconductor epilayer growth During the growth of compound semiconductors by epitaxial processes, substrates are typically mounted to a support. In modular beam epitaxy, mounting is done using indium as a solder. This method has two drawbacks: the indium reacts with the substrate, an... | 05/09/1989 |
| 4828691 | Submersible purification system for radioactive water A portable, submersible water purification system for use in a pool of water containing radioactive contamination includes a prefilter for filtering particulates from the water. A resin bed is then provided for removal of remaining dissolved, particulate,... | 05/09/1989 |
| 4828761 | Process for impregnating a concrete or cement body with a polymeric material A process for impregnating cementitious solids with polymeric materials by blending polymeric materials in a grout, allowing the grout to cure, and contacting the resulting solidified grout containing the polymeric materials with an organic mixture contai... | 05/09/1989 |
| 4827479 | Density gradient free electron collisionally excited X-ray laser An operational X-ray laser (30) is provided that amplifies 3p-3s transition X-ray radiation along an approximately linear path. The X-ray laser (30) is driven by a high power optical laser. The driving line focused optical laser beam (32) illuminates a fr... | 05/02/1989 |
| 4826966 | Radioiodinated branched carbohydrates A radioiodinated branched carbohydrate for tissue imaging. Iodine-123 is stabilized in the compound by attaching it to a vinyl functional group that is on the carbohydrate. The compound exhibits good uptake and retention and is promising in the developmen... | 05/02/1989 |
| 4823601 | Vibration sensing method and apparatus A method and apparatus for nondestructive evaluation of a structure is disclosed. Resonant audio frequency vibrations are excited in the structure to be evaluated and the vibrations are measured and characterized to obtain information about the structure.... | 04/25/1989 |
| 4824547 | Electrophoretic extraction of proteins from two-dimensional electrophoresis gel spots After two-dimensional electrophoresis of proteins or the like, resulting in a polyacrylamide gel slab having a pattern of protein gel spots thereon, an individual protein gel spot is cored out from the slab, to form a gel spot core which is placed in an e... | 04/25/1989 |
| 4824742 | Manifold, bus support and coupling arrangement for solid oxide fuel cells Individual, tubular solid oxide fuel cells (SOFCs) are assembled into bundles called a module within a housing, with a plurality of modules arranged end-to-end in a linear, stacked configuration called a string. A common set of piping comprised of a suita... | 04/25/1989 |
| 4825038 | Method for controlling gas metal arc welding The heat input and mass input in a Gas Metal Arc welding process are controlled by a method that comprises calculating appropriate values for weld speed, filler wire feed rate and an expected value for the welding current by algorithmic function means, ap... | 04/25/1989 |
| 4824276 | Helix coupling A coupling for connecting helix members in series, which consists of a pair of U-shaped elements, one of which is attached to each helix end with the "U" sections of the elements interlocked. The coupling is particularly beneficial for interconnecting hel... | 04/25/1989 |
| 4824447 | Enhanced oil recovery system All energy resources available from a geopressured geothermal reservoir are used for the production of pipeline quality gas using a high pressure separator/heat exchanger and a membrane separator, and recovering waste gas from both the membrane separator ... | 04/25/1989 |
| 4824598 | Synthetic laser medium A laser medium is particularly useful in high average power solid state lasers. The laser medium includes a chormium dopant and preferably neodymium ions as codopant, and is primarily a gadolinium scandium gallium garnet, or an analog thereof. Divalent ca... | 04/25/1989 |
| 4822207 | Anti-terrorist vehicle crash impact energy absorbing barrier An anti-terrorist vehicle crash barrier includes side support structures, crushable energy absorbing aluminum honeycomb modules, and an elongated impact-resistant beam extending between, and at its opposite ends through vertical guideways defined by, the ... | 04/18/1989 |
| 4821584 | Piezoelectric film load cell robot collision detector A piezoelectric load cell which can be utilized for detecting collisions and obstruction of a robot arm end effector includes a force sensing element of metallized polyvinylidene fluoride (PVDF) film. The piezoelectric film sensing element and a resilient... | 04/18/1989 |
| 4820226 | Getter pump for hydrogen and hydrocarbon gases A gettering device for hydrogen isotopes and gaseous hydrocarbons based on the interaction of a plasma and graphite used as cathodic material. The plasma is maintained at a current density within the range of about 1 to about 1000 mA/cm2. The g... | 04/11/1989 |
| 4821091 | Polysilicon photoconductor for integrated circuits A photoconductive element of polycrystalline silicon is provided with intrinsic response time which does not limit overall circuit response. An undoped polycrystalline silicon layer is deposited by LPCVD to a selected thickness on silicon dioxide. The dep... | 04/11/1989 |
| 4820925 | Room air monitor for radioactive aerosols A housing assembly for use with a room air monitor for simultaneous collection and counting of suspended particles includes a casing containing a combination detector-preamplifier system at one end, a filter system at the other end, and an air flow system... | 04/11/1989 |
| 4820391 | Exhaust gas clean up process A method of cleaning an exhaust gas containing particulates, SO2 and NOx includes prescrubbing with water to remove HCl and most of the particulates, scrubbing with an aqueous absorbent containing a metal chelate and dissolved sulfit... | 04/11/1989 |
| 4817494 | Magnetic reconnection launcher An electromagnetic launcher includes a plurality of electrical stages which are energized sequentially in synchrony with the passage of a projectile. Each stage of the launcher includes two or more coils which are arranged coaxially on either closed-loop ... | 04/04/1989 |
| 4818366 | Long life reference electrode An external, reference electrode is provided for long term use with a high temperature, high pressure system. The electrode is arranged in a vertical, electrically insulative tube with an upper portion serving as an electrolyte reservior and a lower porti... | 04/04/1989 |
| 4818448 | Method for fabricating light weight carbon-bonded carbon fiber composites Ultralight carbon-bonded carbon fiber composites of densities in the range of about 0.04 to 0.10 grams per cubic centimeter are fabricated by forming an aqueous slurry of carbonaceous fibers which include carbonized fibers and 0-50 weight percent fugitive... | 04/04/1989 |
| 4818479 | Nuclear reactor spacer grid and ductless core component The invention relates to a nuclear reactor spacer grid member for use in a liquid cooled nuclear reactor and to a ductless core component employing a plurality of these spacer grid members. The spacer grid member is of the egg-shell type and is constructe... | 04/04/1989 |
| 4818485 | Radiation resistant austenitic stainless steel alloys An austenitic stainless steel alloy, with improved resistance to radiation-induced swelling and helium embrittlement, and improved resistance to thermal creep at high temperatures, consisting essentially of, by weight percent: from 16 to 18% nickel; from ... | 04/04/1989 |
| 4819179 | Digital slip frequency generator and method for determining the desired slip frequency The output frequency of an electric power generator is kept constant with variable rotor speed by automatic adjustment of the excitation slip frequency. The invention features a digital slip frequency generator which provides sine and cosine waveforms fro... | 04/04/1989 |
| 4818295 | Cyclone reactor A system is provided to produce sugars from a liquid-solid mixture containing biomass, and an acid, wherein the mixture is heated to an appropriate temperature to achieve hydrolysis. The liquid-solid mixture is introduced as a stream into the circular-cyl... | 04/04/1989 |
| 4816205 | Remotely replaceable tokamak plasma limiter tiles U-shaped limiter tiles placed end-to-end over a pair of parallel runners secured to a wall have two rods which engage L-shaped slots in the runners. The short receiving legs of the L-shaped slots are perpendicular to the wall and open away from the wall, ... | 03/28/1989 |
| 4815828 | Techniques for optically compressing light intensity ranges A pin hole camera assembly for use in viewing an object having a relatively large light intensity range, for example a crucible containing molten uranium in an atomic vapor laser isotope separator (AVLIS) system is disclosed herein. The assembly includes ... | 03/28/1989 |
| 4817101 | Heterodyne laser spectroscopy system A heterodyne laser spectroscopy system utilizes laser heterodyne techniques for purposes of laser isotope separation spectroscopy, vapor diagnostics, processing of precise laser frequency offsets from a reference frequency and the like, and provides spect... | 03/28/1989 |
