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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 4354876 | Utilization of dry scrubber waste materials Cured compacted products suitable for use as landfill materials, embankments, roadbase compositions and the like are produced by the described method from fly ash-containing waste materials obtained by a lime based dry scrubbing flue gas desulfurization o... | 10/19/1982 |
| 4354875 | Controlling the curing time of alkali metal silicates using derivatives of glyoxal A liquid alkali metal silicate composition comprises water, an alkali metal, e.g., sodium silicate, and as curing agent for said alkali metal silicate, a derivative of glyoxal which is 2,3-dihydroxy-1,4-dioxane or glyoxal trimer. The composition optionall... | 10/19/1982 |
| 4336142 | Removal of heavy metals with gamma dicalcium silicate According to the present invention we provide a method of controlling the heavy metal content of the water in an aqueous system which comprises incorporating in the system an amount of gamma dicalcium silicate to insolubilize heavy metals present.... | 06/22/1982 |
| 4329090 | Employing quicklime in stabilizing surface layers of the earth This specification discloses method and apparatus for treating surface layers of the earth to obtain stabilization, build strength and permeability characteristics; characterized by slaking quicklime (CaO) in a mixing tank to form an elevated temperature,... | 05/11/1982 |
| 4316679 | Ground stabilization equipment In apparatus for injecting and mixing a ground stabilization agent into the material of the earth during the operation of an earth drill, a device is provided for generating signals indicative of the upward movement of the earth drill as the drill is with... | 02/23/1982 |
| 4314779 | Method of aquifer restoration A method is disclosed for restoring a clay rich aquifer which has been solution mined with ammonium ions. Calcium carbonate is precipitated from a solution pumped through the aquifer by the addition of calcium oxide, calcium hydroxide, or a mixture thereo... | 02/09/1982 |
| 4300860 | Method of treating a subterranean formation to remove ammonium ions An improved method of restoring a subterranean clay-containing formation having ammonium ions absorbed on the clay, wherein the formation is flushed with a halogenated restoration fluid having a halogen therein which reacts with the ammonium ion in the fo... | 11/17/1981 |
| 4279635 | Process for treating phosphatic clay suspensions A process for treating thickened phosphatic clay suspensions produced in the processing of phosphate ore by water beneficiation, and which have a solids content of from about 5% to about 30%. A deflocculating agent is mixed with the suspension to cause de... | 07/21/1981 |
| 4278292 | Clay stabilization in uranium leaching and restoration Process for the stabilization of formation clays by the use of aluminum in the in-situ leaching of uranium or the restoration of contaminated formations. The aluminum is added to a lixiviant having a pH in the range of 6-10 or to a restoration fluid havin... | 07/14/1981 |
| 4244664 | Method and apparatus for on-site treatment of mud and silt According to this invention, when the area to be treated is accessible, the procedure involves breaking up the soil to be treated by a continuous, forward-moving mixing process down to a chosen depth. A first vertical section of a determined width is foll... | 01/13/1981 |
| 4233015 | Employing quicklime in stabilizing earth This specification discloses method and apparatus for treating subsurface layers of the earth to build strength of the subsurface layers and control movement of the subsurface water characterized by slaking quicklime (CaO) in a mixing tank to form an elev... | 11/11/1980 |
| 4229295 | Solidification of aqueous sludge A process for treating aqueous sludge comprising a slurry of clay minerals and silica in water includes rapidly dispersing throughout the sludge at least one additive compound selected from the group consisting of mineral acids, acid salts of alkaline ear... | 10/21/1980 |
| 4226556 | Injection process and injection apparatus for solidifying a ground An injection process for solidifying a soft ground by injecting a blend of water glass type grout thereinto which is a non-alkaline aqueous solution of silicic acid obtained by the mixing water glass into an aqueous solution of acidic reactant so as to re... | 10/07/1980 |
| 4226557 | Injection process and injection apparatus for solidifying a ground An injection process for solidifying a soft ground by injecting a blend of water glass type grout thereinto which is a non-alkaline aqueous solution of silicic acid obtained by the mixing water glass into an aqueous solution of acidic reactant so as to re... | 10/07/1980 |
| 4222685 | Pond sealing A method of providing a substantially impermeable lining to the bottom of an earthen pond using native soil. Such soil is classified and formed into a slurry containing fine particles of predominately five or less micron size. The pond bottom is covered w... | 09/16/1980 |
| 4209568 | Bentonite-gelled oil waterproofing composition A bentonite composition useful for preventing a flow of water through a structure is disclosed. The composition has substantially all of the bentonite in non-hydrated form by dispersing the bentonite throughout a non-aqueous gel formed from a non-aqueous ... | 06/24/1980 |
| 4192963 | Grounding electrode and method of reducing the electrical resistance of soils A first solution of an electrolyte is injected underground into a volume of soil having negative surface charges on its particles. A cationic surfactant suspended in this solution neutralizes these surface charges of the soil particles within the volume. ... | 03/11/1980 |
| 4187041 | Method for consolidating a body of earth Relatively impermeable earth such as clay is made permeable so as to effectively produce drains or draining layers by injecting into the earth one or more substances chemically reacting with and/or physically cooperating with one or more of the natural co... | 02/05/1980 |
| 4174912 | System for heave reduction in highways due to frost or moisture in expansive clay or shale materials Means for controlling the moisture content and ultimate freeze-thaw cycle parameters of a paved roadbed including, a combination of electrolytic means together with the conventional roadbed, the electrolytic means being utilized to control the moisture mi... | 11/20/1979 |
| 4149817 | Primary reflector for solar energy collection systems and method of making same A fixed, linear, ground-based primary reflector having an extended curved sawtooth-contoured surface covered with a metalized polymeric reflecting material, reflects solar energy to a movably supported collector that is kept at the concentrated line focus... | 04/17/1979 |
| 4136998 | Process for the disposal of the residue of the exhaust gas washers of furnaces in particular bituminous coal power stations A process for disposing of the residue of exhaust gas washers by utilizing them as a structural material in mines. The sulfur in the exhaust gases is reacted with calcium compounds to form CaSO4.2H.sub.2 O. The CaSO4.2H.sub.2 O is re... | 01/30/1979 |
| 4133179 | Soil stabilizing method using air bubbled solidifying suspension A soil stabilizing method by using an air bubbled solidifying suspension or solution, which is jetted into the ground at a high pressure for the formation of solidified soil having homogeneous strength.... | 01/09/1979 |
| 4069678 | Device for solidifying sludgy material in a surface layer This invention relates to a device for solidifying sludgy material depositing on the earth surface, the device comprising an agitator having intergrated agitating shafts, each of which is provided with agitating blades. The agitator is attached to a stern... | 01/24/1978 |
| 4064940 | Water control with polymers A method is provided for reducing the water permeability of a porous subterranean formation by injecting a dispersion of polyamide and a water soluble polymer through a well bore into the formation. Preferred materials are polyamides and poly-acrylamides.... | 12/27/1977 |
| 4043830 | Method of consolidating poor quality soils A method of consolidating a poor quality soil or a water leaking soil by injecting hardeners thereinto, in which a mixture of water and gelling agent and a water glass aqueous solution containing gelling agent are employed as said hardeners, said hardener... | 08/23/1977 |
| 4023325 | Load bearing reinforced ground slab A reinforced horizontal slab having high bearing strength is created on the surface of the ground by initially forming a plurality of discrete vertically elongated reinforced zones in situ in the ground with their tops adjacent ground level and then cover... | 05/17/1977 |
| 4009578 | Method for preventing fluid migration in coal seams A method for preventing fluid migration in coal seams by forming a substantially fluid impermeable zone across the fluid migration path by positioning at least one borehole in the coal seams in a direction generally parallel to the direction of fluid migr... | 03/01/1977 |
| 4004428 | Process for stabilizing soil In the stabilization of soil which comprises injecting into soil a mixture of (A) an aqueous sodium silicate solution and (B) at least one compound selected from the group consisting of chlorides, sulfates and nitrates of aluminum, magnesium and iron, and... | 01/25/1977 |
| 3971222 | Soil stabilization Soil stabilization methods and apparatus whereby a material such as lime is introduced to soil beneath the earth's surface. The lime or other treating material is applied to the soil in slurry form. The slurried material may be introduced at depths from j... | 07/27/1976 |
| 3959975 | Soil stabilization by ion diffusion A method for the stabilization of soils is described wherein an aqueous concentrate or powder of an organic or inorganic ionizable salt is applied to a soil to be stabilized, said salt when solubilized liberating ions which will interact with ions natural... | 06/01/1976 |
| 3956900 | Method for consolidating coal and/or rock in mining The specification describes a method for the consolidation of coal and/or rock in mines by injection of a liquid which subsequently hardens made up of magnesium chloride solution, having a specific gravity above 1.22, magnesium oxide and bentonite. Before... | 05/18/1976 |
| 3950179 | Stabilization composition A hydrous composition for stabilizing finely divided soils comprises a gum swellable when hydrated, such as sodium alginate; water; and an alcohol, such as methanol, in an amount sufficient to prevent the composition from setting prior to use. The composi... | 04/13/1976 |
| 3948055 | Method for controlling stress and increasing the strength of support members in coal mines A method for controlling stress and increasing the load-bearing strength of support members, the support members comprising coal, of a coal mine wherein the method consists essentially of injecting ammonia or hydrochloric acid into the interior portions o... | 04/06/1976 |
