Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2011-03-22
2011-03-22
Menon, Krishnan S (Department: 1777)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S649000, C210S500410, C095S273000
Reexamination Certificate
active
07910003
ABSTRACT:
A polymer alloy has been developed comprising a polysulfone and a vinyl lactam polymer. The resulting alloy has excellent thermal characteristics and even in the presence of substantial quantities in vinyl lactam polymers, has solvent resistance to both organic and aqueous solvent materials. The materials, when dissolved in solvents, can be spun from a variety of solvents into a variety of useful fiber materials. The resulting fine fiber, microfiber and nanofiber materials have excellent thermal and chemical resistance for a variety of fiber applications. The polymer alloys of the invention can be spun into nanofiber mats that can act as a filtration media and can also be combined into conventional substrate materials for fabrication into filter structures.
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Cardinal Richard S.
Ferrer Ismael
Kalayci Veli
Donaldson & Company, Inc.
Menon Krishnan S
Pauly, DeVries Smith & Deffner L.L.C.
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