Battery with charge indicator
US5411817A · kind A · utility
5Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1993 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | Jul 16, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrochemical device for providing a visual indication of the remaining life of a battery, the device comprising an electrode pair with a layer therebetween, the layer comprising a mixture of a photographic color coupler dispersion, an antioxidant and a photographic color developer in a binder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.