Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7360550 | System for recycling spent sulfuric acid, method for recycling spent sulfuric waste liquid, and recycled sulfuric acid A system for recycling spent sulfuric acid, wherein spent sulfuric acid is effectively utilized at a place other than a discharge source regardless of geographical conditions, and a method for recycling waste sulfuric acid. In the system, when spent sulfuric acid th... | 04/22/2008 |
| 7183453 | Method for treating infectious waste matter A system and method is provided for producing a safely disposable end product from waste matter containing undesirable materials, such as infectious, biohazardous, hazardous, or radioactive elements. The method comprises the steps of providing a highly basic solvent... | 02/27/2007 |
| 7163615 | Method of treating substance to be degraded and its apparatus There is provided a method of treating a substance to be degraded comprising the steps of: degrading the substance to produce a degraded product; contacting the product obtained in the degrading step with a liquid; and entrapping a component of the product not trapp... | 01/16/2007 |
| 7034198 | Method for decomposing plastic A conventional method of pyrolytically decomposing plastic to make low-molecular compounds is poor in efficiency of use of energy due to high heating temperatures (at least 600° C. and 800° C. at maximum). The invention provides that a functional powder is ... | 04/25/2006 |
| 6096219 | Method and apparatus for pretreatment of hazardous waste material The present invention provides a method for the pre-treatment of hazardous biological and chemical contaminants from a waste fluid stream prior to discharge to a waste water treatment facility such as a publicly owned water treatment works or a similar pr... | 08/01/2000 |
| 5688378 | Photoassisted oxidation of species in solution The invention relates to methods and processes for the photoassisted oxidation of dissolved species such as arsenic, iron, phosphorous and sulphur. Each aspect of the invention involves supplying to a solution including the species to be oxidized, an oxid... | 11/18/1997 |
| 5527985 | Process for recycling waste sulfuric acid A process for recycling waste sulfuric acid by decomposing organic contaminants by use of light energy, comprising exposing a waste sulfuric acid containing contaminants to a focused radiation emission having an irradiation intensity within the range of f... | 06/18/1996 |
| 5516970 | Process and apparatus for photolytic degradation of explosives A process for photolytic degradation of the organic and nitrogenous components of high explosives in organic solvent is described. The process can be applied with a module photolytic apparatus so that munitions can be destroyed without endangering the env... | 05/14/1996 |
| 5480524 | Method and apparatus for removing undesirable chemical substances from gases, exhaust gases, vapors, and brines The present invention relates to a method and pertinent apparatus for purifying gases, exhaust gases, vapors, and brines, which are contaminated with undesirable chemical substances or contain high concentrations of these substances, by means of photocata... | 01/02/1996 |
| 4981650 | Method for treatment of dioxin-contaminated media Methods for treating toxic chlorinated dibenzo-p-dioxin-contaminated media by photolytic degradation are disclosed. Soil contaminated wiht such toxins are contacted with a photolysis-activating agent such as 1-hexadecylpyridinium chloride and irradiated w... | 01/01/1991 |
| 4780287 | Decomposition of volatile organic halogenated compounds contained in gases The invention is a method and apparatus for rate enhanced decomposition of volatile organic halogenated compounds. In the invention a stream of gas carrying these volatile organic halogenated compounds is passed through a porous bed of silica gel, prefera... | 10/25/1988 |
| 4699667 | Removing residual PCB S from transformers Disclosed is a method and apparatus for removing residual polychlorinated biphenyls from transformers. A vaporized solvent which forms a low-boiling azeotrope with polychlorinated biphenyls is passed through the transformer. The vaporized azeotrope is rem... | 10/13/1987 |
| 4512900 | Method for treating waste compositions Process for treating liquid waste compositions which contain copper ions and a complexing agent for the copper which includes reducing the concentration of copper ions in the waste composition to less than about 8 ppm and contacting the composition with H... | 04/23/1985 |
| 4289594 | Treatment of waste compositions Process for treating liquid waste compositions which contain copper ions and a complexing agent for the copper which includes reducing the concentration of copper ions in the waste solution to less than about 8 ppm and contacting the solution with an ozon... | 09/15/1981 |
| 4144152 | Dehalogenation of halogenated compounds Process for degrading halogenated organic compound having C-halogen groups to remove halogen atoms from said compound by treating it with ultraviolet (UV) radiation and hydrogen. Process for degrading such compound by treating it in aqueous alkaline solut... | 03/13/1979 |
| 4038116 | Method for degrading aromatic explosive solutions A method for treating an aqueous solution of aromatic explosives whereby losive molecules are destroyed and the resulting effluent is safe for disposal. An additive, such as acetone or hydrogen peroxide, is added to an aqueous solution of aromatic explos... | 07/26/1977 |
| 3977952 | Process for decomposing carbon-containing compounds Carbon-containing compounds contained in a gas, such as polluted air or an industrial flue gas, or in a liquid, such as an aqueous solution or dispension, e.g. sewage liquid, contaminated drinking water or waste electroplating baths, are decomposed by bei... | 08/31/1976 |
