In situ treatment of waste water to prevent ground water contamination
Patent 5132021 Issued on July 21, 1992. Estimated Expiration Date: 
April 22, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 22, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of organic waste disposal Process for absorbing liquid leaks and spills Patent #: 4840734 InventorApplicationNo. 689367 filed on 04/22/1991US Classes:210/679, Utilizing exchange or sorbent material associated with inert material210/170, Geographic (e.g., drainage ditch, septic, pond)210/283, Pervious divider between and contacting beds210/484, Medium within foraminous supporting container or sheath210/747, Including geographic feature (e.g., drainage ditch, septic, pond)405/55Cavity constructionExaminersPrimary: Cintins, IvarsAttorney, Agent or FirmInternational ClassB01D 015/04AbstractAn article of manufacture and method for holding and treating water contaminated with one or more water-soluble contaminants to substantially prevent the contaminants from seeping into ground water supplies disposed below a water hold area. The article of manufacture and method include the use of a water-holding material, e.g., a water-swellable clay, such as bentonite, for reducing the permeation of the contaminated water into the soil, and a treatment layer, disposed beneath the water-holding material, containing a material capable of adsorbing, absorbing, ion-exchanging, neutralizing or reacting with one or more water-soluble contaminants within the water for removing a substantial portion of the contaminants from the water so that the portion of the held water that permeates the water-holding layer, will be rendered substantially less contaminated.Field of SearchIon exchange or selective sorptionUtilizing exchange or sorbent material associated with inert material Including geographic feature (e.g., drainage ditch, septic, pond) Geographic (e.g., drainage ditch, septic, pond) Removable cartridge or hand-manipulated container Pervious divider between and contacting beds Particular liquid receiving means or foraminous bed retainer Medium within foraminous supporting container or sheath Porous or apertured pipe, flume, or tileway Uniform discharge Porous Porous waterway, e.g., sand drain, etc. Cavity construction Earth treatment Dissolving earth | |
