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:
Apr. 17, 2001
Filed:
Nov. 03, 1998
Masayuki Ide, Toyohashi, JP;
Takehiro Sasaki, Toyohashi, JP;
Takurou Nakayama, Toyohashi, JP;
Toshihiro Inoue, Toyohashi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-Fu, JP;
Abstract
A sealed lead-acid storage battery having a long trickle life, being excellent in the welded strength between the container cover and the top lid covering the part of the container cover where a vent valve is provided, and having a high reliability is disclosed. The battery comprises: a container for accommodating an electrode group, a container cover for closing an open end of the container by being bonded to the open end of the container with a resin adhesive, and a top lid for covering a part of the container cover where a vent valve is provided by being bonded to the container cover by means of ultrasonic welding, wherein the container is formed with a denatured polyphenylene ether resin containing a flaky inorganic substance of humidity non-transmitting property, whereas the container cover and the top lid are formed with acrylonitrile-butadiene-styrene resin containing no flaky inorganic substance of the humidity non-transmitting property.