Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2003-12-19
2010-06-08
Ryan, Patrick (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S095000, C429S010000, C029S623500
Reexamination Certificate
active
07732078
ABSTRACT:
A liquid-absorbent composition, which has a liquid-absorbent crosslinked resin that exhibits excellent absorption of the nonaqueous electrolyte of nonaqueous electrolyte secondary cells that constitute a nonaqueous electrolyte battery pack (and particularly a lithium ion nonaqueous electrolyte rechargeable battery pack), contains a powder of a liquid-absorbent crosslinked resin produced by crosslinking a methyl vinyl ether/maleic anhydride copolymer with a polyfunctional isocyanate compound, and a binder resin. Also, a liquid-absorbent sheet for a nonaqueous electrolyte battery pack contains supporting substrate and formed on one side of a supporting substrate a liquid-absorbent crosslinked resin layer, produced by crosslinking a methyl vinyl ether/maleic anhydride copolymer with a polyfunctional isocyanate compound. The nonaqueous electrolyte battery pack contains a battery case and disposed within the battery pack a nonaqueous electrolyte battery cell, a wiring circuit board, and an electrolyte absorption member formed from the liquid-absorbent sheet for absorbing electrolyte in the event that electrolyte leaks from the nonaqueous electrolyte battery cell.
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JPO Office Action, Nov. 25, 2008 (English Translation).
Nomura Mamiko
Samukawa Hiroshi
Apicella Karie O'Neill
Oliff & Berridg,e PLC
Ryan Patrick
Sony Chemical & Information Device Corporation
Sony Corporation
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