US2921111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery cells
Assignee: Graham Savage and Associates Inc
•
Filing: 1953-02-02
•
Granted: 1960-01-12
•
Expires: 1973-02-02
Abstract
No abstract record available.
Inventors
- 👤 Clyde A Crowley
- 👤 William M Langdon
- 👤 Demetrios V Louzos
- 👤 James H Conolly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:04
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/32; H01M12/00; H01M12/04; H01M50/00; H01M50/70; H01M50/77; H01M6/42; H01M6/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A HIGH DRAIN PRIMARY BATTERY COMPRISING A CELL WHICH IS PROVIDED WITH AN INLET PORT AND AN OUTLET PORT, SAID CELL HAVING MOUNTED THEREIN A REDUCING METAL ELECTRODE AND AN INERT ELECTRODE SPACED THEREFROM, INDIVIDUAL RESERVOIRS FOR WATER, A SOURCE OF HEXAVALENT CHROMIUM IONS, AND NONREACTIVE INORGANIC ACID, A THERMOSTATICALLY CONTROLLED VALVE FOR CONTROLLING THE ADMISSION OF SAID WATER TO SAID CELL TO REGULATE THE TEMPERATURE THEREIN WITHIN DESIRED LIMITS, A VOLTAGE CONTROLLED VALVE FOR CONTROLLING THE ADMISSION OF SAID NONREACTIVE INORGANIC ACID TO SAID CELL IN RESPONSE TO VOLTAGE DELIVERED BY SAID CELL, MEANS FOR COMMINGLING SAID WATER, SAID SOURCE OF HEXAVALENT CHROMIUM IONS, AND NONREACTIVE INORGANIC ACID TO FORM THE CELL ELECTROLYTE BEFORE THE ADMISSION THEREOF
Claim 2
Dependent Claim
118 words
A HIGH DRAIN PRIMARY BATTERY COMPRISING A CELL WHICH IS PROVIDED WITH AN INLET PORT AND AN OUTLET PORT, SAID CELL HAVING MOUNTED THEREIN A REDUCING METAL ELECTRODE AND AN INERT ELECTRODE SPACED THEREFROM, INDIVIDUAL RESERVOIRS FOR WATER, A SOURCE OF HEXAVALENT CHROMIUM IONS, AND NONREACTIVE INORGANIC ACID, A THERMOSTATICALLY CONTROLLED VALVE FOR CONTROLLING THE ADMISSION OF SAID WATER TO SAID CELL TO REGULATE THE TEMPERATURE THEREIN WITHIN DESIRED LIMITS, A VOLTAGE CONTROLLED VALVE FOR CONTROLLING THE ADMISSION OF SAID NONREACTIVE INORGANIC ACID TO SAID CELL IN RESPONSE TO VOLTAGE DELIVERED BY SAID CELL, MEANS FOR COMMINGLING SAID WATER, SAID SOURCE OF HEXAVALENT CHROMIUM IONS, AND NONREACTIVE INORGANIC ACID TO FORM THE CELL ELECTROLYTE BEFORE THE ADMISSION THEREOF
References Cited (Backward Citations)
US425959A
Cited
US734549A
Cited
GB190812818A
Cited
US940734A
Cited
US2306408A
Cited
US2639306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |