Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer – spacer or materials for use therewith
Reexamination Certificate
2011-07-19
2011-07-19
Ryan, Patrick (Department: 1726)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Separator, retainer, spacer or materials for use therewith
C429S129000, C429S247000, C429S249000, C429S253000, C429S254000, C429S223000, C429S229000
Reexamination Certificate
active
07981549
ABSTRACT:
The instant invention is a separator for a battery having a zinc electrode. The battery separator according to the instant invention includes a microporous membrane, and a coating on at least one surface of the microporous membrane. The coating includes a mixture of 25-40 weight % polymer and 60-75 weight % surfactant combination. The polymer is cellulose acetate, and the surfactant combination includes a first surfactant and a second surfactant. The first surfactant, preferably, has an active ingredient selected from the group consisting of organic ethers, and the second surfactant is, preferably, an oxirane polymer with 2-ethylhexyl dihydrogen phosphate.
REFERENCES:
patent: 3811957 (1974-05-01), Buntin
patent: 4298666 (1981-11-01), Taskier
patent: 4359510 (1982-11-01), Taskier
patent: 4438185 (1984-03-01), Taskier
patent: 4544616 (1985-10-01), Poa et al.
patent: 6479190 (2002-11-01), Wensley
Material Safety Data Sheet—Victawet-12 Surface Release Agent, (Oct. 27, 2005).
Watson Jill V.
Wensley C. Glen
Celgard Inc.
Hammer & Associates, P.C.
Mercado Julian
Ryan Patrick
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