Patent US2569491A successfully refreshed from Google Patents.
US2569491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry cell composition
Assignee: Individual
•
Filing: 1946-06-27
•
Granted: 1951-10-02
•
Expires: 1966-06-27
Abstract
No abstract record available.
Inventors
- 👤 Earl M Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:50
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
AN ELECTROLYTE COMPOSITION FOR LOW TEMPERATURE DRY CELLS COMPRISING A SOLUTION OF FROM 40 TO 65% H2O, 10 TO 30% CACL2.2H2O AND 10 TO 40% ZNCL2, AND A QUANTITY OF NH4CL EQUAL TO 5 TO 20% BY WEIGHT OF SAID SOLUTION.
Claim 2
Dependent Claim
41 words
AN ELECTROLYTE COMPOSITION FOR LOW TEMPERATURE DRY CELLS COMPRISING A SOLUTION OF FROM 40 TO 65% H2O, 10 TO 30% CACL2.2H2O AND 10 TO 40% ZNCL2, AND A QUANTITY OF NH4CL EQUAL TO 5 TO 20% BY WEIGHT OF SAID 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) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |