US2573764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch propeller
Assignee: Individual
•
Filing: 1947-06-07
•
Granted: 1951-11-06
•
Expires: 1967-06-07
Abstract
No abstract record available.
Inventors
- 👤 Carl J Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:46
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190522325A
Cited
US1431382A
Cited
FR726918A
Cited
GB381648A
Cited
US1999091A
Cited
FR771686A
Cited
US2239739A
Cited
US2224640A
Cited
US2378938A
Cited
US2409050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |