Patent US2689617A successfully refreshed from Google Patents.
US2689617A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Model airplane sectional blade propeller and adapter hub
Assignee: Individual
•
Filing: 1951-12-10
•
Granted: 1954-09-21
•
Expires: 1971-12-10
Abstract
No abstract record available.
Inventors
- 👤 Lewis F Bouley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:03
CPC Classifications
A; A63; A63H; A63H27/00; A63H27/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US562190A
Cited
US1142530A
Cited
US1725482A
Cited
US1909885A
Cited
US2235605A
Cited
US2535527A
Cited
US2534662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |