US2600757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folding boat
Assignee: Individual
•
Filing: 1946-10-21
•
Granted: 1952-06-17
•
Expires: 1966-10-21
Abstract
No abstract record available.
Inventors
- 👤 Grimston Francis Bri Sylvester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:39
CPC Classifications
B; B63; B63B; B63B34/00; B63B34/20; B63B34/21; B63B34/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |