US2473329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tail rotor for helicopters
Assignee: Borg Warner Corp
•
Filing: 1944-12-15
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Granted: 1949-06-14
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Expires: 1964-12-15
Abstract
No abstract record available.
Inventors
- 👤 Candler James Nall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:46
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/82; B64C2027/8254
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20668E
Cited
US2100489A
Cited
GB500965A
Cited
US2235260A
Cited
US2337861A
Cited
US2371706A
Cited
US2369652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |