Patent US3384033A successfully refreshed from Google Patents.
US3384033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-automatic locomotive control system
Assignee: Individual
•
Filing: 1967-05-25
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Granted: 1968-05-21
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Expires: 1987-05-25
Abstract
No abstract record available.
Inventors
- 👤 Ruff Douglass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:47
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/32; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1786815A
Cited
US1900408A
Cited
US2977896A
Cited
US2937907A
Cited
FR1277755A
Cited
US3217662A
Cited
US3217663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |