Process for producing porous fibers from orientable olefin polymers having cation-containing, pendent reactive side-groups and the resultant product
Patent 4766036 Issued on August 23, 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 3654679 3796778 3819782 Hollow water absorbing polyester filaments and a process for producing the same Membrane modified hydrogels Process for the production of swellable filaments, fibers and shaped structures of acrylic polymers, and the products obtained thereby Patent #: 4600407 InventorsApplicationNo. 06/776534 filed on 09/16/1985US Classes:428/364, Rod, strand, filament or fiber264/41, PORE FORMING IN SITU (E.G., FOAMING, ETC.)264/49, By treating occluded solids264/54, Chemical blowing428/397, Particular cross section428/398, Tubular or cellular521/143From acyclic mono-unsaturated hydrocarbon as only reactantExaminersPrimary: Anderson, PhilipAttorney, Agent or FirmInternational ClassesD01D 5/00 (20060101)D01F 11/04 (20060101) D01F 11/00 (20060101) B01D 39/08 (20060101) B01D 67/00 (20060101) B01D 69/00 (20060101) B01D 69/08 (20060101) D01D 5/247 (20060101) D01D 5/42 (20060101) AbstractNovel porous fibers and filaments are prepared from normally solid, thermoplastic, orientable, organic polymers which have reactive or reactable groups pendent from the polymer chain, employing a process which involves reactions of said pendent groups while the polymer is in an oriented condition. One of the preferred polymers is a copolymer of ethylene/acrylic acid.Other References
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