US2838591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary cell
Assignee: Alcoa Corp
•
Filing: 1955-02-08
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Granted: 1958-06-10
•
Expires: 1975-02-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John J Stokes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:29
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A DRY CELL COMPRISING AN ALUMINOUS METAL ANODE, A CARBON CATHODE AND A PASTE MIXTURE FILLING THE ENTIRE SPACE BETWEEN SAID ANODE AND CATHODE, SAID PASTE CONSISTING OF FROM 2 TO 25% BY WEIGHT OF THE DRY MIXTURE OF ALUMUNUN CHLORIDE HEXAHYDRATE, 4 TO 25% BY WEIGHT OF THE DRY MIXTURE OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM, SODIUM AND POTASSIUM CHROMATES, THE TOTAL WEIGHT OF SAID CHROMATE COMPONENT NOT EXCEEDING 25%, FROM 5 TO 30% BY WEIGHT OF THE DRY MIXTURE OF FINELY DIVIDED CARBON, FROM 35 TO 80% BY WEIGHT OF THE DRY MIXTURE OF MANAGESES DIOXIDE AND SUFFICIENT WATER TO PROVIDE THE DESIRED CONSISTENCY TO THE PASTE, SAID PASTE HAVING A PH OF LESS THAN 7.
Claim 2
Dependent Claim
124 words
A DRY CELL COMPRISING AN ALUMINOUS METAL ANODE, A CARBON CATHODE AND A PASTE MIXTURE FILLING THE ENTIRE SPACE BETWEEN SAID ANODE AND CATHODE, SAID PASTE CONSISTING OF FROM 2 TO 25% BY WEIGHT OF THE DRY MIXTURE OF ALUMUNUN CHLORIDE HEXAHYDRATE, 4 TO 25% BY WEIGHT OF THE DRY MIXTURE OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM, SODIUM AND POTASSIUM CHROMATES, THE TOTAL WEIGHT OF SAID CHROMATE COMPONENT NOT EXCEEDING 25%, FROM 5 TO 30% BY WEIGHT OF THE DRY MIXTURE OF FINELY DIVIDED CARBON, FROM 35 TO 80% BY WEIGHT OF THE DRY MIXTURE OF MANAGESES DIOXIDE AND SUFFICIENT WATER TO PROVIDE THE DESIRED CONSISTENCY TO THE PASTE, SAID PASTE HAVING A PH OF LESS THAN 7.
References Cited (Backward Citations)
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Cited
US1675973A
Cited
US1696873A
Cited
US2102701A
Cited
US2343194A
Cited
US2697738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |