Membrane
Patent 4866099 Issued on September 12, 1989. Estimated Expiration Date: 
March 10, 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.
March 10, 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 References 4026977 Sulphonated polyaryl-ether-sulphones and membranes thereof Membranes Patent #: 4714725 InventorAssigneeApplicationNo. 07/024198 filed on 03/10/1987US Classes:521/64, Removing a liquid to form a cellular product210/500.41, Sulfone210/650, Filtering through membrane (e.g., ultrafiltration)210/653, Utilizing specified membrane material210/654, Synthetic resin427/244, Filter, sponge, or foam427/245, Microporous coating (e.g., vapor permeable, etc.)427/246, Coagulating or jelling the coating427/384, Organic coating521/27, Membrane or process of preparing521/28, Previously formed solid ion-exchange polymer admixed with nonreactive material or ion-exchange polymer524/465, Mixing with two or more chlorine- or bromine-containing organic compounds; or with a chlorine- or bromine-containing organic compound other than carbon tetrachloride, chloroform, or methylene chloride, and having numerical limitations other than amount, e.g., included herein, are m.p., b.p., m.w, structure, etc., or composition or product thereof, DNRM524/475With water NRMExaminersPrimary: Foelak, MortonAssistant: Acquah, Samuel A. Attorney, Agent or FirmInternational ClassesB01D 71/00 (20060101)B01D 71/52 (20060101) B01D 67/00 (20060101) B01D 71/68 (20060101) C08J 5/22 (20060101) C08J 5/20 (20060101) C08G 65/00 (20060101) C08G 65/48 (20060101) C08G 75/00 (20060101) C08G 75/23 (20060101) Foreign Application Priority Data1986-03-10 GBAbstractA sulphonated aromatic polymer containing repeating units (Ar-Y) (where Y is SO2 and/or CO), where at least half of groups Ar contain a group SO3 M and M is l/m of a polyvalent metal cation in at least 80% of such groups SO3 M, and where m is the valency of the ion. The polyvalent cation compound is formed by heating the corresponding sulphonic acid or monovalent cation compound with a salt of a polyvalent metal. The polymer is useful as a membrane and the polyvalent metal salt addition and/or the heat treatment may be applied to polymer in membrane form.Other References
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