Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer or spacer insulating structure
Reexamination Certificate
2005-07-26
2005-07-26
Barr, Michael (Department: 1746)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Separator, retainer or spacer insulating structure
C429S145000, C029S623100
Reexamination Certificate
active
06921608
ABSTRACT:
The present invention is directed to a battery separator. The battery separator comprises a microporous film having a first portion and a second portion. The first portion is bonded to the second portion. The bond has a strength greater than 5 g/in. The film has a thickness less than 1.7 mils, a Gurley of less than 50 sec/10 cc, and a puncture strength of greater than 400 g/mil.
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patent: 5565281 (1996-10-01), Yu et al.
patent: 5667911 (1997-09-01), Yu et al.
patent: 5922492 (1999-07-01), Takita et al.
patent: 5952120 (1999-09-01), Yu et al.
U.S. Appl. No. 09/484,184, filed Jan. 18, 2002, Call et al.
Berins, M.L., Plastics Engineering Handbook, 5th Edition, Chapman & Hall, New York, NY (1991), pp. 102-105.
Call Ronald W.
Dees J. Robert
Ogura Shizuo
Simmons Donald K.
Wei Xiangyun
Barr Michael
Celgard Inc.
Robert H. Hammer III, P.C.
Wills Monique
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