US2835401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat transporting and launching device
Assignee: E L Caldwell & Sons
•
Filing: 1956-09-17
•
Granted: 1958-05-20
•
Expires: 1976-09-17
Abstract
No abstract record available.
Inventors
- 👤 Byrd George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:00
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/06; B60P3/10; B60P3/1033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733823A
Cited
US1658770A
Cited
FR690682A
Cited
US2471901A
Cited
US2558418A
Cited
US2708045A
Cited
US2788908A
Cited
US2754017A
Cited
US2741383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |