Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2011-01-11
2011-01-11
Egwim, Kelechi C (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C429S010000, C528S377000, C528S391000, C549S042000, C549S046000, C549S048000
Reexamination Certificate
active
07868086
ABSTRACT:
Aromatic sulfonimide ionene polymers useful as membranes in electrochemical cells are prepared.
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E. I. Du Pont de Nemours and Company
Egwim Kelechi C
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