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:
Jul. 01, 2014
Filed:
Dec. 23, 2011
Applicants:
Hajime Kawamoto, Osaka, JP;
Masakazu Tsutsumi, Kyoto, JP;
Jun Nakamura, Kyoto, JP;
Inventors:
Assignee:
GS Yuasa International Ltd., Kyoto-Shi, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided is an electric storage device that can ensure seal in a peripheral area of a portion in a defining wall of a case through which a rivet passes even when a rivet is inserted through the defining wall of the case and the rivet is caulked. The electric storage device includes: an electrode assembly; a case that houses the electrode assembly, the case including a defining wall; and a rivet, wherein a peripheral area of a portion in the defining wall through which the rivet passes has a higher hardness than the remaining area.