Patent US3398716A successfully refreshed from Google Patents.
US3398716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible twin hulled tug
Assignee: Individual
•
Filing: 1967-10-30
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Granted: 1968-08-27
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Expires: 1987-10-30
Abstract
No abstract record available.
Inventors
- 👤 Neilson Torelv
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:26
CPC Classifications
B; B63; B63B; B63B35/00; B63B35/66; B63B35/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3345970A
Cited
US3362372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |