US2439878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gunner's turret for aircraft
Assignee: North American Aviation Corp
•
Filing: 1944-02-21
•
Granted: 1948-04-20
•
Expires: 1964-02-21
Abstract
No abstract record available.
Inventors
- 👤 Julius G Villepigue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:36
CPC Classifications
B; B64; B64D; B64D7/00; B64D7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB422009A
Cited
FR715343A
Cited
FR791106A
Cited
FR797795A
Cited
FR800959A
Cited
FR817970A
Cited
US2261121A
Cited
US2366410A
Cited
GB541265A
Cited
US2358257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |