Ion exchange polymers for anion separations
Patent 5670550 Issued on September 23, 1997. Estimated Expiration Date: 
June 7, 2015. 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.
June 7, 2015. 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 2683124 2801224 Color diffusion transfer unit with polymeric quaternary nitrogen mordant Patent #: 4154615 InventorsApplicationNo. 476964 filed on 06/07/1995US Classes:521/32, Treated with nitrogen-containing material210/682, Radioactive210/684, Metal complexed (e.g., chromate, ferricyanide, chlorplatinate, etc.)521/30, Chemically treated solid polymer521/31, Solid polymer derived from ethylenically unsaturated reactant only525/355, Chemical treating agent contains hydrogen halide, elemental halogen, organic halogen-containing compound, or compound containing only halogen atoms525/379, Organic amine526/263, Nitrogen of ring is bonded directly or indirectly to extracyclic ethylenic moiety526/265, 6-membered ring contains a single nitrogen atom526/278Pentavalent phosphorus is bonded to at least one atom of carbonExaminersPrimary: Zitomer, FredAttorney, Agent or FirmInternational ClassesC08F 008/32C08F 008/40 B01J 041/06 AbstractAnion exchange resins including at least two positively charged sites and a ell-defined spacing between the positive sites are provided together with a process of removing anions or anionic metal complexes from aqueous solutions by use of such resins. The resins can be substituted poly(vinylpyridine) and substituted polystyrene.Field of SearchTreated with nitrogen-containing materialChemically treated solid polymer Solid polymer derived from ethylenically unsaturated reactant only 6-membered ring contains a single nitrogen atom Nitrogen of ring is bonded directly or indirectly to extracyclic ethylenic moiety Pentavalent phosphorus is bonded to at least one atom of carbon Chemical treating agent contains hydrogen halide, elemental halogen, organic halogen-containing compound, or compound containing only halogen atoms Organic amine Radioactive Metal complexed (e.g., chromate, ferricyanide, chlorplatinate, etc.) | |
