The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 1997
Filed:
Mar. 19, 1996
Fumihiko Yoshii, Neyagawa, JP;
Hitoshi Mikuriya, Chigasaki, JP;
Kaoru Okinaga, Fujisawa, JP;
Katsuhiro Okamoto, Toyohashi, JP;
Masaru Watanabe, Nishinomiya, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A cylindrical battery having a high utilization rate and a high discharge capacity rate is disclosed. It has an electrode group configured by rolling up two sheet electrodes of opposite polarity in spiral fashion interposing a separator therebetween, wherein one of the electrodes is provided with a porous metal substrate having a higher porosity layer and a lower porosity layer which has a considerably smaller thickness than that of the higher porosity layer, and an active material filled substantially in the spaces of the higher porosity layer of the porous metal substrate.