Patent US2577970A successfully refreshed from Google Patents.
US2577970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible boat
Assignee: Individual
•
Filing: 1945-09-20
•
Granted: 1951-12-11
•
Expires: 1965-09-20
Abstract
No abstract record available.
Inventors
- 👤 Larsson Frans Torild
- 👤 Larsson Frans Axel
- 👤 Dardel Georges Eric Von
- 👤 Nettelbladt Bo Goran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:54
CPC Classifications
B; B63; B63B; B63B7/00; B63B7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US325374A
Cited
USRE18203E
Cited
GB190909801A
Cited
GB191216661A
Cited
US1650914A
Cited
US1937729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |