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| Number | Title | Issue Date |
| 4874128 | Rail-tie fastening assembly A rail-tie fastening assembly for connecting a rail having a rail flange to a tie comprising a rail seat assembly and a rail anchor. The rail seat assembly is connectible to the tie and includes an anchor slot and a seat hook assembly. The seat hook assem... | 10/17/1989 |
| 4803056 | System for increasing the capacity of a titanium dioxide producing process A system for increasing the capacity of a process for producing titanium dioxide by reacting titanium tetrachloride vapors with oxygen wherein the process includes an oxygen preheat assembly for preheating oxygen to a predetermined temperature level and a... | 02/07/1989 |
| 4702899 | Process for treating coal to reduce sulfur content in flue gases produced by coal combustion A process for reducing the sulfur oxide content of flue gases produced by combustion of sulfur-containing coal containing cations of alkali metals, alkaline earth metals or both, in ion exchangeable form. Flue gases containing sulfur oxides are recycled t... | 10/27/1987 |
| 4700568 | Pulse accumulator network adapted for use in a flow monitoring system A pulse accumulator network for receiving a plurality of pulse trains wherein each pulse train includes a plurality of pulses. The pulse accumulator network accumulates the pulses in each of the received pulse trains and the pulse accumulator network outp... | 10/20/1987 |
| 4669667 | Nozzle for spraying a liquid into a vessel opening A nozzle and a method for spraying a liquid into a vessel opening through such a nozzle wherein the nozzle includes a casing assembly and a core. The casing assembly has a casing opening which extends through the upper end of the casing assembly and exten... | 06/02/1987 |
| 4666562 | Solvent recovery from solvent process material mixtures A method of recovering light organic solvent from a liquid mixture containing the solvent and a process material, such as asphaltenes or coal liquefaction products. The solvent-process material mixture is treated in a solvent separation zone to separate a... | 05/19/1987 |
| 4664788 | Multi-stage coal liquefaction and fractionation method A multi-stage coal liquefaction method in which coal is slurried with a primary light solvent, such as toluene, hexane and/or cyclohexane, and a process-derived primary heavy solvent. The coal-primary solvent slurry is treated under coal-liquefying condit... | 05/12/1987 |
| 4645654 | Reducing sulfur content in flue gases produced by coal combustion A process for reducing the sulfur oxide content of flue gases produced by combustion of sulfur-containing coal containing cations of alkali metals, alkaline earth metals, or both, in ion exchangeable form. Flue gases containing sulfur oxides are recycled ... | 02/24/1987 |
| 4629554 | Coal liquefaction with coal tar solvent A method of liquefying coal in which coal is mixed with a process solvent comprising at least partially hydrogenated coal tar material to produce a coal-solvent slurry. This slurry is treated under coal-liquefying conditions, preferably including a hydrog... | 12/16/1986 |
| 4629392 | System for batch loading coal into railroad cars A method for loading particles, such as coal, into a plurality of railroad cars wherein a control weight of a railroad car loaded with particles is established. Each of the railroad cars is weighed prior to loading particles into the railroad car from a w... | 12/16/1986 |
| 4581498 | Reel having a removable hub An improved reel having a hub and a removable hub. The hub has a diameter and the removable hub is adapted to be removably connected to the reel and about the hub. The removable hub has a diameter which is larger than the diameter of the hub. The removabl... | 04/08/1986 |
| 4581497 | System for monitoring cathodic protection system of marine installations including an improved reel An improved system for monitoring cathodic protection systems for marine installations wherein a reference electrode is utilized to measure and periodically monitor the cathodic reference potentials. The reference electrode is connected to one end of a ca... | 04/08/1986 |
| 4562739 | Production monitoring system A monitoring system utilizing an ultrasonic transducer wherein the power level of the transducer operating signals is raised while maintaining the gain about unity for permitting the use of relatively longer signal paths between a signal generator and the... | 01/07/1986 |
| 4557913 | Borax recovery using sodium metaborate and boric acid intermediates Sodium metaborate is recovered from a boron-containing first feed solution by extraction of the first feed solution with a 1,3-diol, followed by re-extraction with a solution of an alkali metal hydroxide. Boric acid is recovered from a boron-containing se... | 12/10/1985 |
| 4540441 | Salt removal from treated titanium dioxide A method of removing aqueously soluble salt by-products produced by the treatment of raw titanium dioxide particles to add a finish thereto. The finished titanium dioxide particles with the salt are subjected to demineralization with mixed bed ion exchang... | 09/10/1985 |
| 4538939 | Method for ballasting a vessel A method for ballasting a vessel in which a sequence of subsets of ballast tanks, each subset comprising three tanks of the totality of ballast tanks of the vessel, is used to arrive at a final ballast configuration. For each subset in the sequence except... | 09/03/1985 |
| 4522222 | Non-plugging injection valve A valve for injecting fluid into a conduit carrying a slurry subject to separation to form deposits capable of plugging openings into the conduit. The valve comprises a valve body that is sealed to the conduit about an aperture formed through the wall of ... | 06/11/1985 |
| 4508597 | Recovery of organic solvents from liquid mixtures A method of recovering light organic solvent from a liquid mixture containing the solvent and a product material, such as asphaltenes or coal liquefaction products. The solvent-product material mixture is treated to separate a first vapor phase rich in so... | 04/02/1985 |
| 4504006 | Nailer for nailing at least one nail plate to a member A nailer for nailing at least one nail plate to a member. More particularly, the nailer includes a first and a second hammer assembly, the first hammer assembly being adapted to nail a nail plate to one end of a railroad tie and the second hammer assembly... | 03/12/1985 |
| 4502944 | Fractionation of heavy hydrocarbon process material A method of separating a process material comprising oils, resins and asphaltenes into at least three fractions. The process material is mixed in a mixing zone with a solvent selected from the group consisting of paraffinic hydrocarbons having between abo... | 03/05/1985 |
| 4489045 | Recovery of by-product calcium chloride from chlorination of titaniferous ores A process for the recovery of calcium chloride produced in the conversion of metal chloride by-products of chlorination to hydrous metal oxides. The hydrous metal oxides and other by-products of chlorination are insoluble in an aqueous solution of at leas... | 12/18/1984 |
| 4481503 | Production monitoring system A production monitoring system wherein the velocity of fluid flowing through a monitored flowline is plotted with respect to time for a period of time sufficient to establish a repeatable pattern (production flow characteristics profile) and wherein an al... | 11/06/1984 |
| 4479875 | Inlet distributor for liquid-liquid separators Apparatus for mounting in a fluid separation zone for improving the separation of fluids of different densities. The apparatus includes a distributor mounted within the separation zone provided with fluid openings having packing means disposed thereabout.... | 10/30/1984 |
| 4478599 | Method of continuously controlling crystal fines formation A method for continuously controlling the formation of crystal fines in a continuous crystallizing process in which product crystals are produced in a crystallizing zone from crystallizable material in a mother liquor, and in which product crystals are th... | 10/23/1984 |
| 4478697 | Method for electrodepositing metallic manganese A method for electrodepositing metallic manganese in an electrolytic cell wherein a water soluble natural guargum and a polyacrylamide based polymer additive, natural or synthetic, is added to the electrolyte feed solution.... | 10/23/1984 |
| 4460308 | Method for loading coal into railroad cars A system for loading coal or other particles into railroad cars wherein every other railroad car is designated an EVEN railroad car and the remaining every other railroad cars are designated ODD railroad cars. Each EVEN railroad car is weighed after being... | 07/17/1984 |
| 4460550 | Process for production of titanium dioxide from titaniferrous ore Titanium tetrachloride is produced from titanium ore and reductant suspended in molten salt by the passage of chlorine therethrough. The titanium tetrachloride is scrubbed by passage through at least one scrubber of molten salt and oxidized to produce tit... | 07/17/1984 |
| 4457812 | Critical solvent separations in inorganic systems A process for separating inorganic substances involving their abstraction from a mixture with near-supercritical inorganic fluids. One or more inorganic substances are abstracted and then separatively recovered by retrograde condensations. The process par... | 07/03/1984 |
| 4451511 | System for protecting glass structures in a combustion zone A system for protecting glass structures in a combustion zone wherein heat refractory material is applied to the glass structure. The applied heat refractory material substantially is opaque and non-reflective to visible light and also is resistant to deg... | 05/29/1984 |
| 4442075 | Titanium ore chlorination process using a molten salt A process of chlorinating titanium ore suspended with carbonaceous reductant in molten salt by passage of chlorine therethrough. Titanium tetrachloride produced is purified of by-product metal chlorides by their absorption in the salt as non-volatile doub... | 04/10/1984 |
| 4435365 | Process for producing titanium tetrachloride A process for producing titanium tetrachloride in which iron-titanium ore is leached in hydrochloric acid to produce a solid phase comprising upgraded titanium-containing material, and a spent liquid phase. Dissolved metal chlorides in the spent liquid ph... | 03/06/1984 |
| 4427640 | Sequential process for extraction and recovery of vanadium and uranium from wet process acids A process for preferentially extracting and recovering vanadium and uranium from wet process acids. The wet process acid first is contacted with a neutral organo-phosphorus compound to extract the vanadium values. The resulting loaded organic phase is sep... | 01/24/1984 |
| 4417840 | Particulate material transfer system An improved particulate material loading system for transferring particulate material from a storage assembly to a vehicle having a storage bin wherein the material is protected from the outside environment during the transfer. The storage assembly includ... | 11/29/1983 |
| 4415442 | Process for the separation of entrained organic fluids from gaseous streams in a coal deashing system A process for the prevention of the deposition of entrained soluble coal products from vaporous solvent recovered from a heavy fraction comprising insoluble coal products and some solvent and soluble coal products. The heavy fraction is produced in a coal... | 11/15/1983 |
| 4413408 | Method for fabricating electrodes This invention relates to a method for preparing an improved electrode comprised of titanium and platinum joined to one another in such manner as to resist separation by corrosion when utilized in a cathodic protection system in a corrosive environment su... | 11/08/1983 |
| 4406663 | Process for concentration of slurries comprising insoluble coal products A process for producing a flowable concentrated aqueous slurry of insoluble coal products from a dilute slurry of insoluble coal products. The dilute slurry is concentrated to form a nonflowable concentrate having a solids level in excess of 65 weight per... | 09/27/1983 |
| 4405464 | Process for the removal of selenium from aqueous systems A process for reducing the concentration of selenium ions in the Se(VI) oxidation state in an aqueous solution. The aqueous solution is admixed with a quantity of metallic iron. The iron reduces the selenium ions from the Se(VI) oxidation state to a lower... | 09/20/1983 |
| 4405437 | Process for coal liquefaction employing a superior coal liquefaction process solvent A process for liquefying coal utilizing an indigenously derived solvent enriched in basic nitrogen heterocyclic compounds. Particulate coal is slurried with an aromatic hydrocarbon distillate start-up solvent. The slurry is reacted under predetermined con... | 09/20/1983 |
| 4402919 | Process for the regeneration of mineral acids used to solubilize phosphate ores A process for solubilizing uranium and other values in an ore containing the same together with aluminum and phosphorus and effecting regeneration of a mineral acid employed to solubilize the ore. The regeneration is effected by heating the spent acid sol... | 09/06/1983 |
| 4396488 | Process for coal liquefaction employing a superior coal liquefaction process solvent A process for producing a superior coal liquefaction solvent. A particulate coal is admixed with a distillable aromatic hydrocarbon solvent and liquefied under predetermined conditions to form coal liquefaction products comprising distillable and substant... | 08/02/1983 |
