US3008537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rope ladder
Assignee: Individual
•
Filing: 1958-11-14
•
Granted: 1961-11-14
•
Expires: 1978-11-14
Abstract
No abstract record available.
Inventors
- 👤 George G Roberts
- 👤 John B Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:01
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/52; E06C1/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US287560A
Cited
US1349125A
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DE469877C
Cited
GB271613A
Cited
US1976533A
Cited
US2698471A
Cited
US2638260A
Cited
US2877527A
Cited
US2834529A
Cited
US2862270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |