Method for forming a water-impermeable layer in a soil
Patent 4690589 Issued on September 1, 1987. Estimated Expiration Date: 
April 28, 2006. 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 28, 2006. 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 References 3552130 Soil stabilization by ion diffusion Water control with polymers Method for stabilizing soil Injection process and injection apparatus for solidifying a ground Rendering porous structures impermeable by treatment with gellable amine polymers Methods of minimizing fines migration in subterranean formations Patent #: 4558741 InventorAssigneeApplicationNo. 06/856188 filed on 04/28/1986US Classes:405/263, Chemical405/270ImpermeabilizationExaminersPrimary: Husar, Cornelius J.Assistant: Stodola, Nancy J. Attorney, Agent or FirmInternational ClassesE02D 3/12 (20060101)E02D 3/00 (20060101) Foreign Application Priority Data1985-04-30 JPAbstractAn improvement was provided in the method for forming a water-impermeable layer in a sandy soil by sprinkling an aqueous solution containing a water-soluble polymer, e.g. poly(acrylic acid), over the land so as to infiltrate the soil with the solution, according to which the water-impermeable layer can be formed at a controlled depth as desired from the ground surface by controlling the value of pH of the aqueous polymer solution in the range from 4 to 12. | |
