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 |
| 7442848 | Treatment of chemical agent hydrolysates The present invention relates generally to the destruction of chemical weapons. In particular, the present invention relates to methods for treating hydrolysates of chemical agents. In one embodiment, the present invention provides a method comprising oxidizing a hy... | 10/28/2008 |
| 6391205 | Osmotic desalinization process Desalinization of seawater is accomplished through the use of a forward osmosis process, which relies on a series of steps involving the opposition of various aqueous solutions across semi-permeable membranes. The process takes advantage of solutes having... | 05/21/2002 |
| 6197152 | Process and apparatus for recovery of lithium in a helminthoid evaporator A process and apparatus for continuously removing soluble minor constituents from brines containing soluble major and minor constituents by use of a Helminthoid evaporator.... | 03/06/2001 |
| 5843602 | Method of adjusting concentration of developer through load cell utilization and wet nitrogen gas atmosphere The concentration of a developer for use in developing resists in the fabrication of integrated circuits of semiconductors is adjusted highly accurately using a load cell. A stock developer and pure water are supplied to a mixing tank supported on a load ... | 12/01/1998 |
| 5640331 | Method and apparatus for obtaining species concentrations and reaction rates in a turbulent reacting flow A method and apparatus for computing molecular diffusion and chemical reaction within a material wherein shape and time evolution values of one or more material surfaces are determined, and a rate of stretch of each material surface is determined as a fun... | 06/17/1997 |
| 5586051 | Chemical reactor feed control In a process for manufacture of a chemical product, a reactive hydrocarbon feedstream, which varies in composition of the reactive component, is combined with a compatible but unreactive hydrocarbon feedstream to form a blended hydrocarbon stream which is... | 12/17/1996 |
| 5228885 | Process of concentrating a dilute sulfuric acid in a three-stage forced-circulation vacuum evaporation plant The process of concentrating a dilute sulfuric acid in a three-stage vacuum evaporation plant includes feeding an entry dilute sulfuric acid to a first evaporation stage of a vacuum evaporation plant to form an overhead vapor (6), withdrawing a finally co... | 07/20/1993 |
| 5114567 | Method for determining the properties and amount of fluid in a sample Methods are provided for determining the amount of fluids in a porous sample and determining petrophysical properties of those fluids. The methods employ a two component azeotropic solvent capable of dissolving both hydrocarbon and aqueous fluids in a por... | 05/19/1992 |
| 4871373 | Continuous preparation of solutions of low viscosity solvents and high viscosity, pasty products Solutions of low viscosity solvents and high viscosity, pasty products, for example water and sodium dithionite formulations, are prepared in a continuous manner in a matter of seconds in static and dynamic mixers connected in series while at the same tim... | 10/03/1989 |
| 4529444 | Method for separating solutions The invention relates to a method for continuously separating a hypoeutectic solution into two parts, of which parts, one comprises practically pure solvent and the other a solution which has a higher content of the dissolved substance than the original s... | 07/16/1985 |
| 4528168 | Brine saturator method of operation An apparatus is disclosed for dissolving salt in an undersaturated brine to bring the brine up to saturation conditions. A salt slurry, specifically sodium chloride, is brought into a holding tank and recycled to keep the solids suspended in the liquid. P... | 07/09/1985 |
| 4406869 | Process for producing anhydrous sodium carbonate crystal An anhydrous sodium carbonate crystal is produced by crystallizing a sodium carbonate hydrate crystal from an aqueous solution of sodium carbonate in a sodium carbonate hydrate crystallizing zone and transforming said sodium carbonate hydrate to an anhydr... | 09/27/1983 |
| 4391711 | Method of, and apparatus for, effecting liquid-liquid contact An apparatus and method for effecting liquid-liquid contact between an aqueous liquid medium and an organic liquid medium comprises a chamber for holding a body of each of the media having an agitator therein. One or both of the media are supplied to a mi... | 07/05/1983 |
| 4329155 | Process for the purification of waste sulfuric acid containing fluoride The invention relates to a process for the purification of fluoride-containing 65 to 95% strength waste sulfuric acid which contains water, organic impurities and fluoride. The impure sulfuric acid is introduced onto the top tray of a stripping column, in... | 05/11/1982 |
| 4282178 | Use of hydrazine compounds as corrosion inhibitors in caustic solutions The addition of a small amount of hydrazine or a derivative or salt thereof serves to inhibit the corrosive effect of caustic such as sodium hydroxide on metal surfaces during the manufacture of the caustic or in processes using same. For instance, aqueou... | 08/04/1981 |
| 4244924 | Dual temperature concentration system In a dual temperature isotope exchange system--exemplified by exchange of deuterium and protium between water and hydrogen sulfide gas in hot and cold towers, in which the feed stream (water) containing the desired isotope is passed through a pair of towe... | 01/13/1981 |
| 4067082 | Carpet cleaning A carpet cleaning machine comprising a rotary, plastic, static accumulator, drive means for rotating the accumulator, and a pile fabric cleaning pad driven by the accumulator. Preferably the accumulator is directly connected to a nipple pad making driving... | 01/10/1978 |
| 4014735 | Concentration and separation of corrosive liquid mixtures In the processing of a corrosive liquid mixture, such as 50 to 80% aqueous sulfuric acid, by its passage over one surface of a wall of inert heat resistant material, and heating the other surface of said wall, thereby to evaporate from said corrosive liqu... | 03/29/1977 |
| 3933575 | Separation of corrosive liquid mixtures In the processing of a corrosive liquid mixture, such as 50 to 80% aqueous sulfuric acid, by its passage over one surface of a wall of inert heat resistant material, and heating the other surface of said wall, thereby to evaporate from said corrosive liqu... | 01/20/1976 |
