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. 14, 1981
Filed:
Jan. 23, 1980
Yuasa Battery Company Limited, Takatsuki, JP;
Abstract
The invention involves to a maintenance-free type sealed lead-acid batteries. In such battery, a combined separator is of a double layer made by double laminating a sheet-shaped separator formed by entangling glass fibers of a diameter not larger than 1 micron as a base with glass fibers of a diameter not smaller than 5 microns or preferably of 10 to 30 microns and a porous member having a maximum pore diameter larger than of the sheet-shaped separator and the electrolyte consists of an aqueous solution of sulfuric acid in which a small amount of a viscosity increasing agent is present. The thus formed batteries are low in the cost and are high in the gas absorbing performance and life performance.