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:
Jun. 05, 1990
Filed:
Oct. 28, 1988
Applicant:
Inventors:
William B Brecht, Hatfield, PA (US);
David O Feder, Madison, NJ (US);
Joseph M McAndrews, Freeport, NY (US);
Allan J Williamson, King of Prussia, PA (US);
Assignee:
C & D Charter Power Systems, Inc., Plymouth Meeting, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429 50 ; 320-4 ; 379324 ;
Abstract
In a device for providing stand-by power to an electrical apparatus, such as a telephone switching system, the battery contained therein is maintained at a positive plate polarization of about 20 to 40 millivolts per cell.