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:
Feb. 22, 1994
Filed:
Feb. 14, 1992
Applicant:
Inventors:
Satoshi Saito, Kyoto, JP;
Yuko Fujita, Kyoto, JP;
Assignee:
Japan Storage Battery Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429 91 ; 429 90 ;
Abstract
A device for measuring hydrogen ion concentration in an aqueous solution includes a sensing means for sensing hydrogen ion concentration and a reference electrode. The sensing means may be an ion-sensitive field-effect transistor or a hydrogen ion electrode. The sensing means has an ion-sensitive layer composed of tantalum nitride, niobium nitride, zirconium nitride or niobium oxide. When the sensing device is built integrally into a lead-acid battery, the state of charge-discharge of the battery can be effectively known.