Formation of membrane-like material
Patent 4832833 Issued on May 23, 1989. Estimated Expiration Date: 
May 19, 2007. 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.
May 19, 2007. 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 ReferencesRemoval of chlorine-based contaminants from materials contaminated with same Removal of chlorine-based contaminants from materials contaminated the same Method of separating oil or bitumen from surfaces covered with same Patent #: 4704200 AbstractA membrane-like material forming component is obtained by dissolving material crude oil, bitumen or an amphipathic lipid in a solvent to form a solution thereof, the solvent being selected from the group consisting of halogenated hydrocarbons and p-xylene and being capable of forming in the presence of water and the oil, bitumen or amphipathic lipid and interfacial membrane-like material. Water is then admixed so as to cause the membrane-like material to form and the solution, water and membrane-like material are allowed to separate by relative densities, thereby forming a bottom layer of the solution, a top layer of water and an intermediate layer between the bottom and top layers, the intermediate layer comprising the membrane-like material. The membrane-like material is extended into the top layer of water from which it is isolated. The membrane-like material upon being brought into air dissociates and leaves a component derived from the oil, bitumen or amphipathic lipid and which is active to form or regenerate membrane-like material, when recombined with the solvent and water. | |
