Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7037482 | Solvent extraction of a halide from a aqueous sulphate solution A method of extracting a halide and sulphate from an aqueous sulphate solution, such as a zinc sulphate solution, comprises subjecting the solution to solvent extraction to extract halide and sulphate from the solution and controlling the amount of sulphate extracte... | 05/02/2006 |
| 6146612 | Method for recovering sulfuric acid from sulfate salts A process is provided for the recovery of sulfuric acid from NH4 HSO4 and (NH4)2 SO4 salts produced from the sulfuric acid hydrolysis of methylmercaptopropionaldehyde (MMP) cyanohydrin to produce 2-hy... | 11/14/2000 |
| 5766339 | Process for producing cement from a flue gas desulfurization process waste product Cement is produced by forming a moist mixture of a flue gas desulfurization process waste product containing 80-95 percent by weight calcium sulfite hemihydrate and 5-20 percent by weight calcium sulfate hemihydrate, aluminum, iron, silica and carbon, agg... | 06/16/1998 |
| 5409679 | Process for the production of titanium dioxide The production of titanium dioxide by the sulphate process generates waste substances such as the wash filtrates, which are formed in the washing of titanium dioxide hydrate, and waste gases which contain sulphur dioxide. In this improved process the wash... | 04/25/1995 |
| 5286465 | Hydrometallurgical process for recovering iron sulfate and zinc sulfate from baghouse dust A process for recovering zinc/rich and iron-rich fractions from the baghouse dust that is generated in various metallurgical operations, especially in steel-making and other iron-making plants, comprises the steps of leaching the dust by hot concentrated ... | 02/15/1994 |
| 5130112 | Method for recovering high grade process energy from a contact sulfuric acid process An improved process for the recovery of high grade energy from a contact sulfuric acid manufacturing process. Improvements include: injection of steam between an intermediate catalyst stage and a heat recovery absorption tower and/or a heat exchanger for ... | 07/14/1992 |
| 4371512 | Production of alkali metal sulfates Alkali metal sulfates are produced from an aqueous solution containing alkali metal hydrogen sulfate which comprises contacting the aqueous solution of alkali metal hydrogen sulfate with a hydrophilic solvent, the hydrophilic solvent being effective to ex... | 02/01/1983 |
| 4298584 | Removing carbon oxysulfide from gas streams Process for removing carbon oxysulfide from a gas stream including contacting the gas stream with a scrubbing solution containing copper sulfate buffered to an acidic pH and removing at least some of the copper sulfides produced.... | 11/03/1981 |
| 4054562 | Process for the manufacture of lactams In a process for manufacturing a lactam which includes rearranging a cycloalkanone-oxime with sulfuric acid to form the lactam, neutralizing the rearrangement mixture with ammonia to form ammonium sulfate, and separating the lactam and the ammonium sulfat... | 10/18/1977 |
| 4049646 | Process for the manufacture of lactams In a process for manufacturing a lactam which includes rearranging a cycloalkanone-oxime with sulfuric acid to form said lactam, neutralizing the rearrangement mixture with ammonia to form ammonium sulfate, and separating said lactam and said ammonium sul... | 09/20/1977 |
