US2873931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boundary layer control apparatus for improving the action of aircraft
Assignee: Individual
•
Filing: 1953-08-24
•
Granted: 1959-02-17
•
Expires: 1973-08-24
Abstract
No abstract record available.
Inventors
- 👤 Fleischmann Carlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:01
CPC Classifications
B; B64; B64C; B64C23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1580577A
Cited
US1854043A
Cited
US1903818A
Cited
DE702926C
Cited
US2376834A
Cited
US2437732A
Cited
US2399839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |