Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7338603 | Process using rare earths to remove oxyanions from aqueous streams Oxyanions of various contaminant elements, such as chromium, antimony, molybdenum, tungsten, vanadium and uranium, are removed from water and other aqueous feeds by treating the feed with (1) a sorbent comprising one or more rare earth compounds, usually mixed or su... | 03/04/2008 |
| 7300589 | Process for removing arsenic from aqueous streams Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing ... | 11/27/2007 |
| 7231974 | Self-leaving in-situ device and method for passively removing oil from water wells A simple and inexpensive device with no moving arts for removing from a well non-aqueous liquids, such as gasoline or crude oil, that accumulate on top of the water table in the well comprises a buoyant elongated member, such as a plastic tube sealed at both ends, a... | 06/19/2007 |
| 7210530 | Subsea separation system A preferred embodiment of the inventive fluid delivery system comprises a vertical liquid/vapor separator and riser assembly that comprises a multi-phase separator inlet, a vapor outlet and riser, and a liquid outlet port connected to a hydraulically-driven centrifu... | 05/01/2007 |
| 7048853 | Process for removing arsenic from drinking water Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing ... | 05/23/2006 |
| 6925924 | Method and apparatus to improve perforating effectiveness using a unique multiple point initiated shaped charge perforator A non-linear shaped charge perforator for use in perforating an oil and gas formation into which a wellbore has been drilled comprises a monolithic, axisymmetric metal case in which is disposed a main explosive charge between the front of the case, which is closed w... | 08/09/2005 |
| 6863825 | Process for removing arsenic from aqueous streams Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing ... | 03/08/2005 |
| 6761865 | Method for synthesizing crystalline magnesium silicates from geothermal brine Crystalline magnesium silicates are synthesized from silica-containing brines, preferably spent geothermal brines, by mixing the brine with a magnesium-containing compound, adjusting the pH of the resultant mixture between 8.0 and 14, and crystallizing the magnesium... | 07/13/2004 |
| 5464526 | Hydrocracking process in which the buildup of polynuclear aromatics is controlled The buildup of heavy polynuclear aromatic compounds in a hydrocracking system is controlled by contacting at least a portion of the recycle oil to the hydrocracker with a porous solid that has been treated with an acid. The porous solid serves as a suppor... | 11/07/1995 |
| 5285205 | Laser guided vehicle positioning system and method A vehicle guidance and positioning system utilizing a laser, the emitted beam from which is directed over the path along which a vehicle is to be guided. The laser beam impinges on a target area located on the vehicle in such a manner that the impingement... | 02/08/1994 |
| 4582694 | Shock calcined crystalline silica catalysts A process for producing a thermally shock calcined crystalline silica comprising (A) precalcining a crystalline silica at a relatively low temperature, (B) very rapidly increasing the temperature of the crystalline silica to a relatively high temperature ... | 04/15/1986 |
| 4581214 | Shock calcined aluminosilicate zeolites A process for producing a thermally shock calcined aluminosilicate zeolite comprising (A) precalcining an aluminosilicate zeolite at a relatively low temperature, (B) very rapidly increasing the temperature of the aluminosilicate zeolite to a relatively h... | 04/08/1986 |
| 4556458 | Apparatus for cooling, depressurizing, and moisturizing retorted oil shale An apparatus and process are provided for depressurizing, cooling, and, optionally, moisturizing retorted oil shale produced in an oil shale retort operated at superatmospheric pressure. Hot retorted oil shale particles are gravitated from the retort and ... | 12/03/1985 |
| 4528277 | Catalyst for oxidizing hydrogen sulfide Catalysts comprising bismuth and vanadium components are highly active and stable, especially in the presence of water vapor, for oxidizing hydrogen sulfide to sulfur or SO2. Such catalysts have been found to be especially active for the conver... | 07/09/1985 |
| 4521278 | Method for producing needle coke A method is provided for producing needle coke comprising the steps of heating green needle coke at temperatures between about 875° F. and about 1,200° F. for between about 10 minutes and about 24 hours, and, without first allowing the temperature of th... | 06/04/1985 |
| 4469612 | Agglomeration of mineral-derived fines Mineral-derived fines are contacted with a polymeric material to agglomerate the fines. The agglomerating polymeric materials are the homopolymers and salts of homopolymers of acrylic acid and methacrylic acid, the copolymers and salts of copolymers of ac... | 09/04/1984 |
| 4465606 | Stabilization of hydrocarbon oil Hydroprocessed hydrocarbon compositions are inhibited or prevented from forming sediment upon exposure to light by the addition of chemical additives. These sediment inhibiting additives are polyalkenylsuccinimides, calcium sulfonates, metal phenates, pol... | 08/14/1984 |
| 4465584 | Use of hydrogen sulfide to reduce the viscosity of bottoms streams produced in hydroconversion processes Coal, petroleum residuum and similar carbonaceous feed materials are subjected to hydroconversion in the presence of molecular hydrogen to produce a hydroconversion effluent which is then subjected to one or more separation steps to remove lower molecular... | 08/14/1984 |
| 4448665 | Use of ammonia to reduce the viscosity of bottoms streams produced in hydroconversion processes Coal, petroleum residuum and similar carbonaceous feed materials are subjected to hydroconversion in the presence of molecular hydrogen to produce a hydroconversion effluent which is then subjected to one or more separation steps to remove lower molecular... | 05/15/1984 |
| 4441984 | Recovery of oil from oil-bearing limestone Hydrocarbon liquids are recovered from run-of-mine oil-bearing rock composed primarily of limestone by separating the rock into a low-density fraction and a high-density fraction, contacting the low-density fraction with an organic solvent in an extractio... | 04/10/1984 |
| 4434043 | Recovery of catalyst from coal liquefaction residues Metal constituents are recovered from the heavy bottoms produced during the liquefaction of coal and similar carbonaceous solids in the presence of a catalyst containing metal constituents by reducing the carbonaceous content of the heavy bottoms, contact... | 02/28/1984 |
| 4428821 | Oil shale extraction process Hydrocarbon liquids are recovered from kerogen-containing oil shale by treating the oil shale with gaseous ammonia or a gaseous aliphatic amine prior to or during contact of the oil shale with an organic solvent. The hydrocarbon liquids thus extracted fro... | 01/31/1984 |
| 4417972 | Recovery of coal liquefaction catalysts Metal constituents are recovered from the heavy bottoms produced during the liquefaction of coal and similar carbonaceous solids in the presence of a catalyst containing a metal capable of forming an acidic oxide by burning the heavy bottoms in a combusti... | 11/29/1983 |
| 4408999 | Coal and oil shale beneficiation process Coal, oil shale and similar carbonaceous solids are beneficiated by subjecting the solids to electromagnetic radiation having a frequency between about 0.1 MHz and about 105 MHz in the presence of an aqueous acid solution. The electromagnetic e... | 10/11/1983 |
| 4366864 | Method for recovery of hydrocarbons from oil-bearing limestone or dolomite Hydrocarbon liquids and/or gases are recovered from thick underground deposits of oil-bearing limestone or dolomite by drilling two or more boreholes from the earth's surface into the lower part of the deposit, establishing communication between the boreh... | 01/04/1983 |
| 4365975 | Use of electromagnetic radiation to recover alkali metal constituents from coal conversion residues In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein particles containing alkali metal residues are produced, alkali metal constituents are recovered from the particles b... | 12/28/1982 |
| 4348487 | Production of methanol via catalytic coal gasification Methanol is produced by gasifying a carbonaceous feed material with steam in the presence of a carbon-alkali metal catalyst and added hydrogen and carbon monoxide at a temperature between about 1000° F. and about 1500° F. and at a pressure in excess of ... | 09/07/1982 |
| 4348486 | Production of methanol via catalytic coal gasification Methanol is produced by gasifying a carbonaceous feed material with steam in the presence of a carbon-alkali metal catalyst and added hydrogen and carbon monoxide at a temperature between about 1000° F. and about 1500° F. and at a pressure in excess of ... | 09/07/1982 |
| 4348274 | Oil shale upgrading process A size fraction of oil shale is upgraded by separating the shale into a first low density fraction containing particles relatively rich in kerogen and a first high density fraction containing particles relatively lean in kerogen, crushing the first low de... | 09/07/1982 |
| 4345989 | Catalytic hydrogen-donor liquefaction process Coal or a similar solid carbonaceous feed material is converted into lower molecular weight liquid hydrocarbons by contacting the feed material with a hydrogen-donor solvent containing above about 0.6 weight percent donatable hydrogen and molecular hydrog... | 08/24/1982 |
| 4338184 | Coal conversion in the presence of added alkali metal compounds Coal or similar liquefiable carbonaceous solids are converted into hydrocarbon liquids by contacting the feed solids with molecular hydrogen in the absence of an added hydrocarbon solvent and in the presence of an added alkali metal compound under liquefa... | 07/06/1982 |
| 4338188 | Coal cleaning process A size fraction of coal is physically cleaned by separating the coal into a low density fraction containing relatively small amounts of inorganic constituents and a high density fraction containing relatively large amounts of inorganic constituents, crush... | 07/06/1982 |
| 4336034 | Process for the catalytic gasification of coal Carbonaceous solids are contacted in the presence of water with potassium sulfate and a calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, and calcium carbonate thereby producing treated carbonaceous solids which are ... | 06/22/1982 |
| 4334893 | Recovery of alkali metal catalyst constituents with sulfurous acid In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein solid particles containing alkali metal residues are produced, alkali metal constituents are recovered from the parti... | 06/15/1982 |
| 4322283 | Coal conversion in the presence of added hydrogen sulfide Coal or similar liquefiable carbonaceous solids are converted into lower molecular weight liquids by contacting the feed solids with molecular hydrogen in the absence of externally added hydrocarbon liquids and in the presence of added hydrogen sulfide un... | 03/30/1982 |
| 4318712 | Catalytic coal gasification process A carbonaceous feed material, a potassium compound having a relatively poor catalytic activity as compared to that of potassium carbonate, and a sodium or lithium salt are introduced into a gasification reactor. The carbonaceous material is then gasified ... | 03/09/1982 |
| 4313816 | Staged temperature coal conversion process Coal or similar liquefiable carbonaceous solids are converted into lower molecular weight liquids by contacting the feed solids with molecular hydrogen in the absence of externally added hydrocarbon liquids under liquefaction conditions during sequential ... | 02/02/1982 |
| 4292048 | Integrated catalytic coal devolatilization and steam gasification process Hydrocarbon liquids and a methane-containing gas are produced from carbonaceous feed solids by contacting the solids with a mixture of gases containing carbon monoxide and hydrogen in a devolatilization zone at a relatively low temperature in the presence... | 09/29/1981 |
| 4284416 | Integrated coal drying and steam gasification process Carbonaceous solids slurried in an aqueous solution, which preferably contains catalyst constituents having gasification activity, are dried by contacting the slurry with superheated steam in a fluid bed slurry dryer and the resultant dried solids are sub... | 08/18/1981 |
| 4283267 | Staged temperature hydrogen-donor coal liquefaction process An increased yield of hydrogenated liquid product is obtained from coal by contacting the feed coal with a hydrogen-donor solvent and a hydrogen-containing gas in a series of two or more liquefaction zones arranged in series and operated in such a manner ... | 08/11/1981 |
