US2758561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid deflector system for endless chain propellers in amphibian craft
Assignee: Individual
•
Filing: 1949-11-10
•
Granted: 1956-08-14
•
Expires: 1969-11-10
Abstract
No abstract record available.
Inventors
- 👤 Emil S Cigledy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
F; F41; F41H; F41H7/00; F41H7/02; B; B60; B60F; B60F3/00; B60F3/0007; B60F3/0015; B63; B63H; B63H1/00; B63H1/30; B63H1/34; B63H2001/342; B63H2001/344
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |