US3478711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible sea train
Assignee: HERBERT M COMBS
•
Filing: 1968-07-30
•
Granted: 1969-11-18
•
Expires: 1988-07-30
Abstract
No abstract record available.
Inventors
- 👤 Herbert M Combs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:27
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/56; B63B21/62; B63G; B63G8/00; B63G8/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2727485A
Cited
US3208423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |