Removal of metals from solutions
Patent 4747954 Issued on May 31, 1988. Estimated Expiration Date: 
September 16, 2005. 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.
September 16, 2005. 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 3493498 Water conditioning process Method of machine washing of solid soiled materials by contacting the circulating wash liquid with organic cationic exchange resins Patent #: 4120653 InventorsApplicationNo. 06/776347 filed on 09/16/1985US Classes:210/670, Including rehabilitating or regenerating exchange material or sorbent210/681, Removing ions210/687, Calcium or magnesium (e.g., hardness, water softening, etc.)210/688, Heavy metal585/820By contact with solid sorbentExaminersPrimary: Cintins, IvarsAttorney, Agent or FirmInternational ClassesC01D 15/00 (20060101)C01D 3/14 (20060101) C01D 3/16 (20060101) C01D 15/04 (20060101) C01D 3/00 (20060101) C01G 3/00 (20060101) C01F 7/00 (20060101) C01G 37/00 (20060101) C01F 11/00 (20060101) C01G 21/00 (20060101) C01G 53/00 (20060101) C01G 49/00 (20060101) C01G 9/00 (20060101) AbstractParticles, fibers, or filaments of ethylene/carboxylic acid copolymers or terpolymers, especially in highly porous or microporous form, are employed in removing contaminants from solution in aqueous and/or organic liquids, especially metal contaminants. The porous polymers, having a surface area/weight ratio of at least about 0.5 m2 /gm, are useful alone, but may also be used in conjunction with, or in tandem with, previously known ion exchange resins such as polyacrylic acid crosslinked with divinylbenzene.Other References
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