US3576674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead peroxide-sulfuric acid cell
Assignee: Individual
•
Filing: 1969-10-21
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Granted: 1971-04-27
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Expires: 1989-10-21
Abstract
Abstract THE INVENTION IS A LEAD PEROXIDE-SULFURIC ACID CELL IN WHICH THE POSITIVE ELECTRODE COMPRISES TITANIUM NITRIDE HAVING A THIN FILM OF NONPOLARIZING MATERIAL AND COATED WITH A MIXTURE OF LEAD PEROXIDE CONTAINING A SMALL FRACTIONAL PART OF LEAD PHOSPHATE. THE NEGATIVE ELECTRODE COMPRISES AN ACTIVE POROUS LEAD SURFACE. THE ELECTROLYTE IS SURFURIC ACID, WHICH MAY BE GELLED.
Inventors
- 👤 Samuel Ruben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:05
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M4/00; H01M4/02; H01M4/14; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |