US2432775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating disc type aircraft
Assignee: Individual
•
Filing: 1943-06-09
•
Granted: 1947-12-16
•
Expires: 1963-06-09
Abstract
No abstract record available.
Inventors
- 👤 Clarence D Lennon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:55
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR362683A
Cited
US1254496A
Cited
US1295571A
Cited
US1974738A
Cited
GB489293A
Cited
US2303695A
Cited
US2340427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |