US2127687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller
Assignee: AMERICAN PROPELLER Co
•
Filing: 1930-04-23
•
Granted: 1938-08-23
•
Expires: 1950-04-23
Abstract
No abstract record available.
Inventors
- 👤 Heath Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:05
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-08-22 | 1942-02-21 | 1942-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-08-22 | 1946-02-21 | 1946-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-08-22 | 1950-02-21 | 1950-08-23 | $7700.00 | Window Closed / Lapsed |