US2442380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for warming dry batteries
Assignee: Individual
•
Filing: 1942-02-25
•
Granted: 1948-06-01
•
Expires: 1962-02-25
Abstract
No abstract record available.
Inventors
- 👤 John P Schrodt
- 👤 George W Vinal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:32
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/60; H01M10/63; H01M10/637; H01M10/61; H01M10/615; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190526688A
Cited
US982493A
Cited
US1266780A
Cited
US1650470A
Cited
US1974187A
Cited
US2157139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |