US2563020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller assembly for model airplanes
Assignee: Individual
•
Filing: 1949-05-20
•
Granted: 1951-08-07
•
Expires: 1969-05-20
Abstract
No abstract record available.
Inventors
- 👤 Walter F Gemeinhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:29
CPC Classifications
A; A63; A63H; A63H27/00; A63H27/02; F; F02; F02B; F02B75/00; F02B75/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR419505A
Cited
US1608755A
Cited
US1801725A
Cited
US1634330A
Cited
US1661633A
Cited
US1773319A
Cited
US1730742A
Cited
US1926428A
Cited
US2234073A
Cited
US2278900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |