US2500571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing mechanism for electric motors
Assignee: Ingersoll Rand Co
•
Filing: 1947-04-26
•
Granted: 1950-03-14
•
Expires: 1967-04-26
Abstract
No abstract record available.
Inventors
- 👤 Harold C Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:06
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/02; H02P25/10; H02P25/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US381768A
Cited
US1268330A
Cited
US1476412A
Cited
US1744998A
Cited
US1856146A
Cited
US2099554A
Cited
US2274480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |