Patent US2938974A successfully refreshed from Google Patents.
US2938974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor speed governor
Assignee: Motorola Solutions Inc
•
Filing: 1956-10-19
•
Granted: 1960-05-31
•
Expires: 1976-10-19
Abstract
No abstract record available.
Inventors
- 👤 Querfurth Wilhelm Max Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:48
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/06; H01H35/10; H02; H02K; H02K11/00; H02K11/20; H02K11/21; H02K11/23
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1870896A
Cited
US1855703A
Cited
US2098226A
Cited
US1984512A
Cited
US2084907A
Cited
US2048494A
Cited
US2438810A
Cited
US2617904A
Cited
US2719945A
Cited
US2748333A
Cited
US2762229A
Cited
US2794163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |