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:
Aug. 21, 2012
Filed:
Sep. 27, 2007
Michiko Fujiwara, Osaka, JP;
Seiji Wada, Osaka, JP;
Yasushi Sumihiro, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An alkaline primary battery of the present invention includes a positive electrode containing at least one of manganese dioxide and nickel oxyhydroxide; a negative electrode containing zinc; a separator disposed between the positive electrode and the negative electrode; an alkaline electrolyte; a battery case for housing the positive electrode, the negative electrode, the separator, and the alkaline electrolyte; a sealing plate for sealing the opening portion of the battery case; a resin-made gasket disposed between the battery case and the sealing plate; and a negative electrode current collector inserted in the negative electrode and the gasket. Between the battery case and the gasket, a sealing agent is applied. The sealing agent includes a mixture of a hot-melt resin with a weight average molecular weight of 1000 to 3000 and a softening point of 95 to 160° C.; and polybutene with a number average molecular weight of 300 to 700 and a kinematic viscosity at 40° C. of 10 to 1000 mm/S.