Patent US2509160A successfully refreshed from Google Patents.
US2635221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charging system controlled by time and voltage responsive devices
Assignee: Chloride Electrical Storage Co Ltd
•
Filing: 1952-02-19
•
Granted: 1953-04-14
•
Expires: 1972-02-19
Abstract
No abstract record available.
Inventors
- 👤 Harvey Robert Antony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:52
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US422438A
Cited
US585620A
Cited
US1433078A
Cited
US1786280A
Cited
US2197423A
Cited
US2166788A
Cited
US2272745A
Cited
US2354877A
Cited
US2456978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |