US2481749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction jet torque compensation for helicopters
Assignee: UNITED HELICOPTERS Inc
•
Filing: 1946-11-25
•
Granted: 1949-09-13
•
Expires: 1966-11-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Stanley Hiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:34
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/82; B64C2027/8245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1704895A
Cited
US1697770A
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US1742461A
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US1922167A
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US2006805A
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FR883462A
Cited
US2369652A
Cited
US2365328A
Cited
US2419604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |