US2441348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection device for electric batteries
Assignee: Individual
•
Filing: 1945-03-28
•
Granted: 1948-05-11
•
Expires: 1965-03-28
Abstract
No abstract record available.
Inventors
- 👤 Ducruet Arthur Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:27
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/288; H02; H02H; H02H7/00; H02H7/18
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |