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| Number | Title | Issue Date |
| 5803983 | Method for removing solid particulate material from within liquid fuel injector assemblies A method for removing residual solid particulate material from the interior of liquid fuel injectors and other fluid flow control mechanisms having or being operatively associated with a flow-regulating fixed or variable orifice. The method comprises the ... | 09/08/1998 |
| 4252564 | Method for cleaning bomb-reduced uranium derbies The concentration of carbon in uranium metal ingots induction cast from derbies prepared by the bomb-reduction of uranium tetrafluoride in the presence of magnesium is effectively reduced to less than 100 ppm by removing residual magnesium fluoride from t... | 02/24/1981 |
| 4234423 | Energy recovery system The present invention is directed to an improved wet air oxidation system and method for reducing the chemical oxygen demand (COD) of waste water used from scrubbers of coal gasification plants, with this COD reduction being sufficient to effectively elim... | 11/18/1980 |
| 4229909 | Tool grinding machine The present invention relates to an improved tool grinding mechanism for grinding single point diamond cutting tools to precise roundness and radius specifications. The present invention utilizes a tool holder which is longitudinally displaced with respec... | 10/28/1980 |
| 4224992 | Method for enhanced oil recovery The present invention is directed to an improved method for enhanced recovery of oil from relatively "cold" reservoirs by carbon dioxide flooding. In oil reservoirs at a temperature less than the critical temperature of 87.7° F. and at a pore pressure gr... | 09/30/1980 |
| 4215088 | Method for fabricating boron carbide articles The present invention is directed to the fabrication of boron carbide articles having length-to-diameter or width ratios greater than 2 to 1. The process of the present invention is practiced by the steps comprising hot pressing boron carbide powder into ... | 07/29/1980 |
| 4187738 | Rim for rotary inertial energy storage device and method The present invention is directed to an improved rim or a high-performance rotary inertial energy storage device (flywheel). The improved rim is fabricated from resin impregnated filamentary material which is circumferentially wound in a side-by-side rela... | 02/12/1980 |
| 4175929 | Process for control of pollutants generated during coal gasification The present invention is directed to an improvement in the coal gasification process that effectively eliminates substantially all of the environmental pollutants contained in the producer gas. The raw producer gas is passed through a two-stage water scru... | 11/27/1979 |
| 4173327 | Solid handling valve The present invention is directed to a solids handling valve for use in combination with lock hoppers utilized for conveying pulverized coal to a coal gasifier. The valve comprises a fluid-actuated flow control piston disposed within a housing and provide... | 11/06/1979 |
| 4163516 | Method for joining metal by solid-state bonding The present development is directed to a method for joining metal at relatively low temperatures by solid-state bonding. Planar surfaces of the metal workpieces are placed in a parallel abutting relationship with one another. A load is applied to at least... | 08/07/1979 |
| 4157528 | Wellbore pressure transducer Subterranean earth formations containing energy values are subjected to hydraulic fracturing procedures to enhance the recovery of the energy values. These fractures are induced in the earth formation by pumping liquid into the wellbore penetrating the ea... | 06/05/1979 |
| 4153427 | Apparatus and method for feeding coal into a coal gasifier This invention is directed to a system for feeding coal into a gasifier operating at high pressures. A coal-water slurry is pumped to the desired pressure and then the coal is "dried" prior to feeding the coal into the gasifier by contacting the slurry wi... | 05/08/1979 |
| 4152381 | Method for preparing metallated filament-wound structures Metallated graphite filament-wound structures are prepared by coating a continuous multi-filament carbon yarn with a metal carbide, impregnating the carbide coated yarn with a polymerizable carbon precursor, winding the resulting filament about a mandrel,... | 05/01/1979 |
| 4152482 | Anisotropic fibrous thermal insulator of relatively thick cross section and method for making same The present invention is directed to an anisotropic thermal insulator formed of carbon-bonded organic or inorganic fibers and having a thickness or cross section greater than about 3 centimeters. Delaminations and deleterious internal stresses generated d... | 05/01/1979 |
| 4148235 | Coupling for joining a ball nut to a machine tool carriage The present invention relates to an improved coupling for joining a lead screw ball nut to a machine tool carriage. The ball nut is coupled to the machine tool carriage by a plurality of laterally flexible bolts which function as hinges during the rotatio... | 04/10/1979 |
| 4142868 | Wear compensating seal means for rotary piston coal feeder The present invention is directed to a wear compensating seal arrangement for use in a rotary piston feeder utilized for feeding pulverized coal into a gasifier operating at relatively high pressures and elevated temperatures. The rotary piston feeder has... | 03/06/1979 |
| 4128473 | Catalytic hydrotreating process Carbonaceous liquids boiling above about 300° C such as tars, petroleum residuals, shale oils and coal-derived liquids are catalytically hydrotreated by introducing the carbonaceous liquid into a reaction zone at a temperature in the range of 300° to 45... | 12/05/1978 |
| 4123949 | Inertial energy storage device The inertial energy storage device of the present invention comprises a composite ring formed of circumferentially wound resin-impregnated filament material, a flanged hollow metal hub concentrically disposed in the ring, and a plurality of discrete filam... | 11/07/1978 |
| 4122897 | In situ gasification process for producing product gas enriched in carbon monoxide and hydrogen The present invention is directed to an in situ coal gasification process wherein the combustion zone within the underground coal bed is fed with air at increasing pressure to increase pressure and temperature in the combustion zone for forcing product ga... | 10/31/1978 |
| 4095650 | Method for increasing the calorific value of gas produced by the in situ combustion of coal The present invention relates to the production of relatively high Btu gas by the in situ combustion of subterranean coal. The coal bed is penetrated with a horizontally-extending borehole and combustion is initiated in the coal bed contiguous to the bore... | 06/20/1978 |
| 4090875 | Ductile tungsten-nickel-alloy and method for manufacturing same The tensile elongation of a tungsten-nickel-iron alloy containing essentially 95 weight percent reprocessed tungsten, 3.5 weight percent nickel, and 1.5 weight percent iron is increased from a value of less than about 1 percent up to about 23 percent by t... | 05/23/1978 |
| 4072084 | Graphite fiber reinforced structure for supporting machine tools Machine tools utilized in precision machine operations require tool support structures which exhibit minimal deflection, thermal expansion and vibration characteristics. The tool support structure of the present invention is a graphite fiber reinforced co... | 02/07/1978 |
| 4069867 | Cyclic flow underground coal gasification process The present invention is directed to a method of in situ coal gasification for providing the product gas with an enriched concentration of carbon monoxide. The method is practiced by establishing a pair of combustion zones in spaced-apart boreholes within... | 01/24/1978 |
| 4062404 | Method for in situ combustion This invention relates to an improved in situ combustion method for the recovery of hydrocarbons from subterranean earth formations containing carbonaceous material. The method is practiced by penetrating the subterranean earth formation with a borehole p... | 12/13/1977 |
| 4057780 | Method for describing fractures in subterranean earth formations The configuration and directional orientation of natural or induced fractures in subterranean earth formations are described by introducing a liquid explosive into the fracture, detonating the explosive, and then monitoring the resulting acoustic emission... | 11/08/1977 |
| 4052885 | Portable device and method for determining permeability characteristics of earth formations The invention is directed to a device which is used for determining permeability characteristics of earth formations at the surface thereof. The determination of the maximum permeability direction and the magnitude of permeability are achieved by employin... | 10/11/1977 |
| 4045724 | Electromagnetic wave method for mapping subterranean earth formations The present invention is directed to a method for remotely mapping subterranean coal beds prior to and during in situ gasification operations. This method is achieved by emplacing highly directional electromagnetic wave transmitters and receivers in bore ... | 08/30/1977 |
| 4043192 | Apparatus for providing directional permeability measurements in subterranean earth formations Directional permeability measurements are provided in a subterranean earth formation by injecting a high-pressure gas from a wellbore into the earth formation in various azimuthal directions with the direction having the largest pressure drop being indica... | 08/23/1977 |
| 4032105 | Mold with improved core for metal casting operation The present invention is directed to a mold containing an improved core for use in casting hollow, metallic articles. The core is formed of, or covered with, a layer of cellular material which possesses sufficient strength to maintain its structural integ... | 06/28/1977 |
| 4026356 | Method for in situ gasification of a subterranean coal bed The method of the present invention relates to providing controlled directional bores in subterranean earth formations, especially coal beds for facilitating in situ gasification operations. Boreholes penetrating the coal beds are interconnected by laser-... | 05/31/1977 |
| 4025317 | High pressure rotary piston coal feeder for coal gasification applications The subject development is directed to an apparatus for feeding pulverized coal into a coal gasifier operating at relatively high pressures and elevated temperatures. This apparatus is a rotary piston feeder which comprises a circular casing having a coal... | 05/24/1977 |
| 4016784 | Tool setting device The present invention relates to a tool setting device for use with numerically controlled machine tools, such as lathes and milling machines. A reference position of the machine tool relative to the workpiece along both the X and Y axes is utilized by th... | 04/12/1977 |
| 4011076 | Method for fabricating beryllium structures Thin-walled beryllium structures are prepared by plasma spraying a mixture of beryllium powder and about 2500 to 4000 ppm silicon powder onto a suitable substrate, removing the plasma-sprayed body from the substrate and placing it in a sizing die having a... | 03/08/1977 |
| 4005233 | Filament wound structure and method The present invention relates to a filament wound spherical structure comprising a plurality of filament band sets disposed about the surface of a mandrel with each band of each set formed of a continuous filament circumferentially wound about the mandrel... | 01/25/1977 |
| 3997005 | Method for control of subsurface coal gasification The burn front in an in situ underground coal gasification operation is controlled by utilizing at least two parallel groups of vertical bore holes disposed in the coalbed at spaced-apart locations in planes orthogonal to the plane of maximum permeability... | 12/14/1976 |
| 3978805 | Stabilized floating platforms The subject invention is directed to a floating platform for supporting nuclear reactors and the like at selected offshore sites. The platform is provided with a stabilizer mechanism which significantly reduces the effects of wave action upon the platform... | 09/07/1976 |
| 3979209 | Ductile tungsten-nickel alloy and method for making same The present invention is directed to a ductile, high-density tungsten-nickel alloy which possesses a tensile strength in the range of 100,000 to 140,000 psi and a tensile elongation of 3.1 to 16.5 percent in 1 inch at 25°C. This alloy is prepared by the ... | 09/07/1976 |
| 3977478 | Method for laser drilling subterranean earth formations Laser drilling of subterranean earth formations is efficiently accomplished by directing a collimated laser beam into a bore hole in registry with the earth formation and transversely directing the laser beam into the earth formation with a suitable refle... | 08/31/1976 |
| 3976735 | Fabrication of boron articles This invention is directed to the fabrication of boron articles by a powder metallurgical method wherein the articles are of a density close to the theoretical density of boron and are essentially crackfree. The method comprises the steps of admixing 1 to... | 08/24/1976 |
| 3969123 | Refractory ceramic compositions and method for preparing same This invention relates to ceramic compositions of tungsten and tantalum oxides including 0 to 33 1/3 mole percent of a metal oxide such as hafnia. These ceramics are characterized by melting points greater than about 1400°C and selectively controlled coe... | 07/13/1976 |
