US3483843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable propulsion means for ships
Assignee: JAMES M HAWTHORNE
•
Filing: 1968-11-01
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Granted: 1969-12-16
•
Expires: 1988-11-01
Abstract
No abstract record available.
Inventors
- 👤 James M Hawthorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:08
CPC Classifications
B; B63; B63B; B63B17/00; B63B17/0018; B63H; B63H25/00; B63H25/42; B63H5/00; B63H5/07; B63H5/125; B63H2025/425; B63H5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |