US2544642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing rudder for small boats
Assignee: Individual
•
Filing: 1946-03-14
•
Granted: 1951-03-13
•
Expires: 1966-03-14
Abstract
No abstract record available.
Inventors
- 👤 Frank R Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:49
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/48; B63H25/06; B63H25/38; B63H25/382; B63H25/383
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) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |