US2787331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectively reversible motor control for electrically driven tractor
Assignee: Individual
•
Filing: 1954-01-07
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Granted: 1957-04-02
•
Expires: 1974-01-07
Abstract
No abstract record available.
Inventors
- 👤 Robert G Letourneau
- 👤 Charles C Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:17
CPC Classifications
B; B60; B60K; B60K1/00; B60K1/02; B60L; B60L1/00; B60L1/003; B60L15/00; B60L15/20; B60L15/2036; B60L50/00; B60L50/10; B60L50/11; B60L2200/00; B60L2200/40; B60L2220/00; B60L2220/40; B60L2220/44; B60L2240/00; B60L2240/40; B60L2240/42; B60L2240/421; B60L2250/00; B60L2250/24; B60L2260/00; B60L2260/20; B60L2260/28; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70; Y02T10/7072; Y02T10/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE284493C
Cited
US670278A
Cited
US2120100A
Cited
US2082001A
Cited
US2039513A
Cited
US2405636A
Cited
US2698919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |