Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Reexamination Certificate
2005-07-12
2005-07-12
Zalukaeva, Tatyana (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
C521S027000, C521S025000, C521S031000, C521S029000, C524S755000, C524S757000, C524S765000, C524S766000, C528S494000, C528S495000
Reexamination Certificate
active
06916853
ABSTRACT:
Solid and liquid compositions containing particles of highly fluorinated ion-exchange polymer having sulfonate functional groups with an ion exchange ratio of less than about 33. The compositions contain at least about 25% by weight of polymer particles having a particle size of about 2 nm to about 30 nm.
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Curtin Dennis Edward
Howard, Jr. Edward George
E. I. du Pont de Nemours and Company
Zalukaeva Tatyana
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