US2439324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuit
Assignee: United States, WAR, Secretary of
•
Filing: 1945-08-01
•
Granted: 1948-04-06
•
Expires: 1965-08-01
Abstract
No abstract record available.
Inventors
- 👤 Robert M Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:06
CPC Classifications
H; H03; H03K; H03K6/00; H03K6/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2350069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |