US3575728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric cells using urea monosulfonic acid as electrolyte
Assignee: Individual
•
Filing: 1968-12-18
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Granted: 1971-04-20
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Expires: 1988-12-18
Abstract
Abstract THE INVENTION PROVIDES AN ELECTRIC CELL IN WHICH UREA MONOSULFONIC ACID IS USED AS THE ELECTROLYTE. THE OTHER PARTS OF THE CELL, EXCEPTING THE ELECTROLYTE, INVOLVE THE FOLLOWING THREE TYPES IN COMBINATION OF THE ELEMENTS; THE FIRST ONE COMPRISING CARBON AS A POSITIVE ELECTRODE, ZINC AS A NEGATIVE ELECTRODE AND MANGANESE DIOXIDE OR AIR AS A DEPOLARIZER; THE SECOND ONE COMPRISING IRON OR NICKEL AS A POSITIVE ELECTRODE, ZINC AS A NEGATIVE ELECTRODE AND AIR AS A DEPOLARIZER; AND THE THIRD ONE COMPRISING COPPER AS A POSITIVE ELECTRODE, ZINC AS A NEGATIVE ELECTRODE AND CUPRIC OXIDE AS A DEPOLARIZER.
Inventors
- 👤 Hiroshi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:59
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M10/00; H01M10/36; H01M6/04; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |