Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2011-07-26
2011-07-26
Fortuna, Ana M (Department: 1777)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S651000, C210S500270, C210S500410, C210S500370, C264S049000, C428S308400
Reexamination Certificate
active
07985339
ABSTRACT:
A method for making a polysulfone having zwitterionic functionality comprising reacting a piperazine amine functionalized polysulfone with sultone is described as are blends with other polymers. Membranes containing polysulfones having zwitterionic functionality are also provided. Membranes thus formed are used in hemodialysis, hemofiltration, and water purification.
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Steiger Daniel
Yeager Gary William
Zhang Yanshi
Zhou Hongyi
Fortuna Ana M
Gallagher Eileen W.
General Electric Company
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