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. 29, 2000
Filed:
Mar. 17, 1998
Applicant:
Inventor:
Fred F Feres, Rochester Hills, MI (US);
Assignee:
Exide Corporation, Reading, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429 86 ; 429 88 ; 428 664 ; 428 667 ;
Abstract
A flooded lead acid battery includes a casing enclosing a plurality of cells having liquid electrolyte therein and a cover incorporating negative and positive terminals and having a plurality of vent holes. The vent holes are covered by at least one closure having a vent cavity therein, and a relatively rigid porous polytetrofluorethylene disc having hydrophobic properties is sealed within the vent cavity.