Separator for electrochemical devices
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United States of America Patent
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Issued Date -
Apr 29, 2004
app pub date -
Oct 25, 2002
filing date -
Oct 25, 2002
priority date (Note) -
Abandoned
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Abstract
A separator for a wound electrochemical device comprising an expanded polytetrafluoroethylene membrane having pores defining an internal surface area, the internal surface area being substantially coated with a pore coating agent, the separator having a longitudinal modulus of greater than 20,000 lbs/in.sup.2.
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