Patent US3138129A successfully refreshed from Google Patents.
US3138129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodynamic electromagnetic propulsion
Assignee: Individual
•
Filing: 1962-05-07
•
Granted: 1964-06-23
•
Expires: 1982-05-07
Abstract
No abstract record available.
Inventors
- 👤 Lester T Bankston
- 👤 Jr Hugh P Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:55
CPC Classifications
F; F42; F42B; F42B19/00; F42B19/12; B; B63; B63H; B63H11/00; B63H11/02; B63H11/025; B63H11/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2997013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |