US2696580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible motor control
Assignee: Motors Liquidation Co
•
Filing: 1951-08-27
•
Granted: 1954-12-07
•
Expires: 1971-08-27
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Shewmon
- 👤 Clyde C Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:15
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |