Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2011-07-12
2011-07-12
Kalafut, Stephen J. (Department: 1727)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C029S002000, C419S002000, C428S557000
Reexamination Certificate
active
07976986
ABSTRACT:
A sintered substrate is configured such that pores having a pore size (pore radius) of from 5 μm to 7 μm have a peak volume fraction with respect to the total pore volume of the sintered substrate, and pores having a pore radius of greater than 8.5 μm has a volume fraction of 11% or less with respect to the total pore volume of the sintered substrate. The sintered substrate has a smaller number of large-sized pores than conventional sintered substrates and a more uniform pore size distribution, and therefore shows a sufficient strength even when the porosity is increased. In addition, a cadmium negative electrode employing the sintered substrate shows excellent gas absorption capability and therefore can reduce the internal pressure of the battery during charge.
REFERENCES:
patent: 3405011 (1968-10-01), Caprioglio
patent: 4206271 (1980-06-01), Norling et al.
patent: 6103319 (2000-08-01), Harada et al.
patent: 2003/0118466 (2003-06-01), Yuh et al.
patent: 4-248269 (1992-09-01), None
patent: 2003-297371 (2003-10-01), None
Fujisawa Chihiro
Furuichi Atsuya
Karasumi Kohei
Kudo Yasushiro
Ochi Makoto
Kalafut Stephen J.
Sanyo Electric Co,. Ltd.
Westerman Hattori Daniels & Adrian LLP
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