US2719014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-lift airplane with all-moving tail unit
Assignee: HELIO AIRCRAFT Corp
•
Filing: 1954-07-30
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Granted: 1955-09-27
•
Expires: 1974-07-30
Abstract
No abstract record available.
Inventors
- 👤 Otto C Koppen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:12
CPC Classifications
B; B64; B64C; B64C5/00; B64C5/10; B64C5/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1862902A
Cited
US1976482A
Cited
DE665316C
Cited
US2563757A
Cited
US2541704A
Cited
US2557426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |