US2689540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat stabilizing device
Assignee: NORMAN J VILE
•
Filing: 1951-11-03
•
Granted: 1954-09-21
•
Expires: 1971-11-03
Abstract
No abstract record available.
Inventors
- 👤 Emma M Kasey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:09
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/06; B63B2039/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US471212A
Cited
US785427A
Cited
US874031A
Cited
US1301917A
Cited
GB429170A
Cited
US2257406A
Cited
US2576716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |