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 00:50
CPC Classifications
B; B64; B64D; B64D7/00; B64D7/02; B64D7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2377073A
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US2524702A
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US2572127A
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US2570251A
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US2654083A
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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) | 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 |