Patent US303290A successfully refreshed from Google Patents.
US2448052A
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Active material for alkaline cells and method of preparing same
Assignee: Individual
•
Filing: 1945-05-14
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Granted: 1948-08-31
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Expires: 1965-05-14
Abstract
No abstract record available.
Inventors
- 👤 Roberts Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:10
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/04; H01M4/0438; H01M4/044; H01M4/0445; H01M4/24; H01M4/246; H01M4/36; H01M4/0473; H01M4/62; H01M4/64; H01M4/70; H01M4/76; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US871214A
Cited
US756176A
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US917875A
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US1555438A
Cited
GB239609A
Cited
US1687307A
Cited
US1929357A
Cited
US2030717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |