Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer – spacer or materials for use therewith
Reexamination Certificate
2011-05-10
2011-05-10
Apicella, Karie O'Neill (Department: 1726)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Separator, retainer, spacer or materials for use therewith
C429S250000, C429S251000
Reexamination Certificate
active
07939204
ABSTRACT:
A separator for a lead-acid battery enabling the lead acid battery to infallibly have a predetermined capacity after the initial charging and a prolonged service life by limiting the maximum quantity of reducing substance liberated or produced from the separator at or below a given level.The separator for a lead-acid battery comprising a porous membrane made mainly from a polyolefin resin, an inorganic powder and a mineral oil and containing a surface active agent as an auxiliary material, characterized in that the amount of any reducing substance liberated or eluted after 24 hours of electrolysis carried out at about 25° C. with a direct current of 1.2 A by using an electrolytic cell composed of the porous membrane, a positive electrode, a negative electrode and diluted sulfuric acid is 1.0 ml or less per 100 cm2when calculated from the consumption of a (1/100)N potassium permanganate solution per 100 cm2of the porous membrane.
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Office Action issued on May 8, 2009 in the corresponding Chinese patent application No. 200580005820.9 with English translation.
Kita Masaki
Matsunami Yoshiaki
Nagakubo Shuhei
Shidomi Takashi
Yamashita Junpei
Apicella Karie O'Neill
GS Yuasa Corporation
Kratz Quintos & Hanson, LLP
Nippon Sheet Glass Company Limited
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