Patent US2737853A successfully refreshed from Google Patents.
US2737853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wing mounted defensive units for airplanes
Assignee: Glenn L Martin Co
•
Filing: 1949-07-15
•
Granted: 1956-03-13
•
Expires: 1969-07-15
Abstract
No abstract record available.
Inventors
- 👤 Gordon P Gravenhorst
- 👤 Talmadge W Elam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:10
CPC Classifications
B; B64; B64D; B64D7/00; B64D7/02; B64D7/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2377073A
Cited
US2524702A
Cited
US2463233A
Cited
US2454806A
Cited
US2520166A
Cited
US2407451A
Cited
US2573021A
Cited
US2572127A
Cited
US2472136A
Cited
US2570251A
Cited
US2654083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |