US2987893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater craft
Assignee: AMF Inc
•
Filing: 1956-10-29
•
Granted: 1961-06-13
•
Expires: 1976-10-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Jack D Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:31
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/52; B63G; B63G8/00; B63G8/001; B63G2008/002; B63G2008/005; B63G2008/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US228556A
Cited
US872888A
Cited
US638335A
Cited
US1329225A
Cited
US2023334A
Cited
US2359964A
Cited
US2377442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |