US2554447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltaic cell
Assignee: GAF Chemicals Corp
•
Filing: 1949-01-26
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Granted: 1951-05-22
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Expires: 1969-01-26
Abstract
No abstract record available.
Inventors
- 👤 Donald E Sargent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/60; H01M6/00; H01M6/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A DRY CELL COMPRISING A CONTAINER OF ALUMINUM, A CENTRALLY DISPOSED CARBON ROD CONSTITUTING THE POSITIVE ELECTRODE, A MASS OF DEPOLARIZING COMPOSITION SURROUNDING SAID CARBON ELECTRODE, AND AN ELECTROLYTE PERMEATING SAID DEPOLARIZING COMPOSITION AND INTERPOSED BETWEEN THE SAME AND SAID ALUMINUM CONTAINER, SAID ELECROLYTE BEING A PASTE OF ZINC OXIDE WITH A 10-30% AQUEOUS CAUSTIC SODA SOLUTION.
Claim 2
Dependent Claim
57 words
A DRY CELL COMPRISING A CONTAINER OF ALUMINUM, A CENTRALLY DISPOSED CARBON ROD CONSTITUTING THE POSITIVE ELECTRODE, A MASS OF DEPOLARIZING COMPOSITION SURROUNDING SAID CARBON ELECTRODE, AND AN ELECTROLYTE PERMEATING SAID DEPOLARIZING COMPOSITION AND INTERPOSED BETWEEN THE SAME AND SAID ALUMINUM CONTAINER, SAID ELECROLYTE BEING A PASTE OF ZINC OXIDE WITH A 10-30% AQUEOUS CAUSTIC SODA SOLUTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |