US2750549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control system
Assignee: Individual
•
Filing: 1953-06-01
•
Granted: 1956-06-12
•
Expires: 1973-06-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Russell Sydnor Crenshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:23
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1360462A
Cited
US1503213A
Cited
US1479561A
Cited
US1844704A
Cited
US2550569A
Cited
US2440319A
Cited
US2676292A
Cited
US2695982A
Cited
US2559538A
Cited
US2560698A
Cited
US2565157A
Cited
US2558086A
Cited
US2558094A
Cited
US2677796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |