Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1993-05-11
1994-02-01
Sever, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210654, 21032175, 21032184, 21050037, 21050042, B01D 6308, B01D 7134
Patent
active
052829715
ABSTRACT:
A filter medium comprising a microporous polyvinylidene fluoride membrane and a polymer containing positively charged quaternary ammonium groups covalently bonded to the membrane, and a method of using the filter medium to treat a composition, particularly a biological or pharmaceutical composition such as an ophthalmic composition.
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Degen Peter J.
Lee Joseph
Pall Corporation
Sever Frank
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