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| Number | Title | Issue Date |
| 4829486 | Transmitting multiple borehole parameters in sonic logging In an acoustic logging system for providing information regarding selected parameters of the wall of a borehole in the earth, and of the rock formation which is adjacent the borehole, in which a single transmit/receive transducer system (T/RTS) mounted on... | 05/09/1989 |
| 4780380 | Porous lithium electrodes and their use in nonaqueous electrochemical cells Porous lithium electrodes for use in nonaqueous electrochemical cells are prepared by depositing lithium from solution in liquid ammonia.... | 10/25/1988 |
| 4746327 | Ethylene-unsaturated, ester-substituted olefin terpolymer flow improvers An ethylene-unsaturated, ester-substituted olefin distillate flow improver and cold-flow plugging point improvers are disclosed.... | 05/24/1988 |
| 4713421 | Process for obtaining narrow molecular weight distribution in vinyl aromatic mass polymerization system In a process for the mass polymerization of vinyl aromatic monomer wherein vinyl aromatic monomer is polymerized in successive stages of increasing temperature, the improvement which narrows the molecular weight distribution of the resulting polymer compr... | 12/15/1987 |
| 4711766 | Apparatus for mixing cracking catalyst with a fluid hydrocarbon The present invention relates to a plug valve which effects the immediate and intimate mixing of fluidizable cracking catalyst with a fluid hydrocarbon in a riser reactor. Further, a stationary guide tube is located around a portion of the plug valve stem... | 12/08/1987 |
| 4705643 | Detergent lubricant compositions An ashless two-stroke cycle additive is prepared by condensing isostearic acid and tetraethylenepentamine. The additive maintains excellent engine cleanliness and has excellent low-temperature storage stability in a lubricant composition.... | 11/10/1987 |
| 4705832 | Injection moldable amide-imide copolymers containing polyetherimides The toughness properties of a polyamide-imide copolymer are improved by the addition of polyetherimides. These copolymers are useful as engineering resins, films are molded objects.... | 11/10/1987 |
| 4699895 | Process for the manufacture of catalysts for the production of maleic anhydride A process for the manufacture of a phosphorus-vanadium and phosphorus-vanadium co-metal catalysts suitable for use in the manufacture of maleic anhydride from benzene, butane, and other C4 hydrocarbons which process comprises reacting at a temp... | 10/13/1987 |
| 4684674 | Injection moldable polyamide-imide containing aromatic sulfone polymers Novel polyamide-imide-phthalamide copolymers and polyamide-imide copolymers containing aromatic sulfone polymers are disclosed. These copolymers are useful in the manufacture of molded objects and engineering resins.... | 08/04/1987 |
| 4677598 | Seismic data acquisition method Three-dimensional seismic prospecting is conducted using a less than complete multifold array of seismic sources and receivers which are positioned so that the resulting system of linear static connection equations according to common depth point are cont... | 06/30/1987 |
| 4673442 | Decoking process A specially constructed decoking apparatus is provided to effectively and efficiently bore a pilot hole and ream the remainder of a bed of coke with a high pressure stream of water or other cutting fluid without first changing nozzle heads or using differ... | 06/16/1987 |
| 4672169 | Apparatus and method for heating materials with a laser heat source An apparatus and method for heating materials with photoelectric radiant energy include directing photoelectric radiant energy onto a reflective conical member positioned at one focal line of an ellipsoidal reflective surface. The radiant energy is disper... | 06/09/1987 |
| 4670104 | Polar solvent dedusting A process and system is provided to produce and dedust oil from oil shale and other types of solid hydrocarbon-containing material. In the process, raw oil shale is retorted, preferably with solid heat carrier material, to liberate an effluent product str... | 06/02/1987 |
| 4668380 | Method for treating shale A method for producing a kerogen concentrate from oil shale comprises treating shale with an aqueous caustic treating solution to produce a shale product of substantially transformed mineral content, and then treating the shale product with an aqueous aci... | 05/26/1987 |
| 4656153 | Active carbon containing a dispersion of a metal component and method for making same A high surface area, porous active carbon containing a substantially uniform dispersion of a metal or metal-containing material and a method for making the same are disclosed.... | 04/07/1987 |
| 4652543 | Catalysts useful for the manufacture of maleic anhydride having a characteristic X-ray diffraction pattern A process for the manufacture of novel phosphorus-vanadium and phosphorus-vanadium co-metal catalysts having a characteristic X-ray diffraction pattern suitable for use in the manufacture of maleic anhydride from benzene, butane and other C4 hy... | 03/24/1987 |
| 4648523 | Underground tank assembly with internal bladder An improved underground tank assembly is provided for storing motor fuels, such as gasoline or diesel fuel. the underground tank assembly has an expandable bladder-like primary tank positioned within the interior of a rigid secondary tank. Advantageously,... | 03/10/1987 |
| 4649205 | Process for the manufacture of maleic anhydride utilizing catalysts reactivated with alkyl esters of orthophosphoric acid in the presence of water A process for the reactivation of a vanadium-phosphorus-oxygen catalyst promoted by metals selected from the group consisting of zinc, molybdenum, niobium, tungsten, uranium, cobalt and tin with alkyl esters of phosphoric acid and water is disclosed. The ... | 03/10/1987 |
| 4643812 | Photochemical process for the hydrobromination of olefinic double bonds The free radical hydrobromination reaction of an olefinic compound is initiated photochemically by irradiating a mixture of hydrogen bromide and the olefinic compound with coherent light having a wavelength in the range from about 335 to about 500 nm.... | 02/17/1987 |
| 4640944 | Injection moldable polyamide-imide-phthalamide copolymers containing polyetherimides Novel polyamide-imide-phthalamide copolymers containing polyetherimides are disclosed. These copolymers are useful for the manufacture of thin films, molded objects and engineering resins.... | 02/03/1987 |
| 4640744 | Amorphous carbon electrodes and their use in electrochemical cells Amorphous carbon is an electrocatalytically active material which is useful as an electrode component in electrochemical cells.... | 02/03/1987 |
| 4640963 | Method and apparatus for recycle of entrained solids in off-gas from a gas-phase polyolefin reactor In a process for quench-cooled, vapor-phase polymerization of olefin monomer comprising (a) contacting an olefin monomer, or mixture of olefin monomers, with a polymerization catalyst in the presence of hydrogen in a reactor vessel to form polymer product... | 02/03/1987 |
| 4638072 | Disubstituted maleic anhydride compounds Di-substituted maleic anhydride compounds are disclosed of the structural formula ##STR1## wherein R and R1 are selected from the group consisting of aliphatic and phenyl moieties, and R2 is a divalent aromatic moiety. Poly... | 01/20/1987 |
| 4636299 | Process for the manufacture of lubricating oils The present invention provides for a process for reducing the pour point of a hydrocarbon feedstock containing nitrogen- and sulfur-containing compounds. Specifically, the hydrocarbon feedstock is passed to an extraction zone wherein N-Methyl-2-pyrrolidon... | 01/13/1987 |
| 4632213 | Seismic source system for use in water covered area Apparatus for forming a downwardly directed beam of acoustic wave energy in a body of water, comprising a source of acoustic wave energy such as a water gun, supported at a selected depth in the body of water. Means are provided above and around the sourc... | 12/30/1986 |
| 4631264 | Catalyst and process for preparation of alpha, beta-unsaturated acids Catalyst and process are disclosed for preparation of alpha, beta-unsaturated acids. Catalyst comprises a silica component and a Group IA alkali metal component which is present in an amount of from 200 to 15,000 parts per million, said silica component c... | 12/23/1986 |
| 4629859 | Enhanced evaporation from a laser-heated target The rate of evaporation of material from a laser-heated target is enhanced by coating the target with a layer of condensed substantially inert gas.... | 12/16/1986 |
| 4629700 | Selective conversion of cyano compounds to amides and carboxylic acids A process for producing aromatic compound having at least one cyano group and one amide group or carboxyl group which process comprises subjecting aromatic polynitrile compound containing no carboxyl groups in a simple medium to the action of one or more ... | 12/16/1986 |
| 4627735 | Double reverse helix agitator The double reverse helix agitator with an internal conveying screw is used in a gas phase olefin polymerization reactor having at least one polymerization section and has helical flights defined by helical blades which are mounted to a shaft, which extend... | 12/09/1986 |
| 4624836 | Apparatus and process for mixing cracking catalyst with a fluid hydrocarbon A plug valve which effects the immediate and intimate mixing of fluidizable cracking catalyst with a fluid hydrocarbon in a riser reactor. Specifically there is an elongated feed tube extending generally upwardly through the acess opening into the riser, ... | 11/25/1986 |
| 4622210 | Sulfur oxide and particulate removal system A system is provided in which particulates and sulfur oxides are simultaneously removed from flue gases in a granular bed filter with special sulfur oxide-capturing and particulate-removing material. The spent sulfur oxide-capturing and particulate-removi... | 11/11/1986 |
| 4620922 | Catalyst and process for the hydrotreating of nitrogen-containing feeds There are disclosed a catalyst and a process for the hydrodenitrogenation of a hydrocarbon stream containing a substantial amount of nitrogen compounds, such as whole shale oil. The catalyst comprises a hydrogenation component comprising chromium, molybde... | 11/04/1986 |
| 4619771 | Technique for increased retention time in oil field settling tanks A technique for continuous gravity separation of a produced oil and water emulsion has particular utility in separating water for reinjection during a waterflood secondary recovery operation without loss of saleable oil. The method employs a flow directio... | 10/28/1986 |
| 4620049 | Method and apparatus for controlling polybutene production The method is particularly adapted for controlling the molecular weight of a product output from a polybutene reactor. The method includes the steps of: deriving from the operating parameter of a polybutene reactor system a formula which correlates molecu... | 10/28/1986 |
| 4618594 | Catalyst and process for the hydrodenitrogenation and hydrocracking of high-nitrogen feeds There is disclosed a catalyst, which catalyst comprises a hydrogenation component comprising chromium, molybdenum, and at least one metal of Group VIII, a crystalline molecular sieve zeolite, and a porous refractory inorganic oxide. Suitable molecular sie... | 10/21/1986 |
| 4617175 | Nitrogen oxide, sulfur oxide, and particulate removal system A system is provided in which particulates, nitrogen oxides, and sulfur oxides are simultaneously removed from flue gases in a granular bed filter and scrubber with a nitrogen oxide-capturing reducing agent and a bed of sulfur oxide-capturing and particul... | 10/14/1986 |
| 4615390 | System to control the combining of two fluids A method and related system are disclosed for combining two fluids in correct proportions. The flow rates of the two fluids are measured and the volume proportion of the first fluid to the second fluid is determined from these measurements. The flow rate ... | 10/07/1986 |
| 4615362 | Overfill and spillage protection device An environmentally safe protection device is provided to contain and store both fill hose spillage and underground tank overfill of gasoline and diesel fuel. The containment and protection device has a fill tube and an auxiliary vapor return tube to accom... | 10/07/1986 |
| 4613707 | Hydrogenation using copper aluminum borate catalyst The reduction of organic compounds to the corresponding hydroxy compounds which comprises contacting a suitable organic compound selected from the group consisting of organic carboxylic acid compounds, aldehydes and ketones with a reducing agent in the pr... | 09/23/1986 |
| 4611613 | Decoking apparatus A specially constructed decoking apparatus is provided to effectively and efficiently bore a pilot hole and ream the remainder of a bed of coke with a high pressure stream of water or other cutting fluid without first changing nozzle heads or using differ... | 09/16/1986 |
