US2843337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite aircraft system and method of flight
Assignee: HIILER HELICOPTERS
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Filing: 1953-09-29
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Granted: 1958-07-15
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Expires: 1973-09-29
Abstract
No abstract record available.
Inventors
- 👤 James A J Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:22
CPC Classifications
B; B64; B64D; B64D5/00; F; F16; F16C; F16C11/00; F16C11/04; F16C11/06; F16C11/0685; F16C11/069; F16C2326/00; F16C2326/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |