Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer or spacer insulating structure
Reexamination Certificate
2003-03-19
2011-10-18
Ruddock, Ula C (Department: 1729)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Separator, retainer or spacer insulating structure
C429S145000, C429S247000, C429S252000
Reexamination Certificate
active
08039140
ABSTRACT:
An absorbent battery separator comprising a substantially homogeneous blend of a thermoplastic polymer and of at least one inert filler, where the inert filler is pyrogenic silica, precipitated silica, titanium dioxide, magnesium carbonate, magnesium oxide and magnesium hydroxide, or mixtures thereof and, the separator has a volume porosity of at least 75% and an extraction pore size of greater than 2 microns.
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Amer-Sil S.A.
Cantor & Colburn LLP
Echelmeyer Alix
Ruddock Ula C
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