US2512665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control system
Assignee: S Smith and Sons Ltd
•
Filing: 1944-03-14
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Granted: 1950-06-27
•
Expires: 1964-03-14
Abstract
No abstract record available.
Inventors
- 👤 Meredith Frederick William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/04; H02K19/08; G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05D; G05D1/00; G05D1/0055
Claims Analysis
Total Claims: 0
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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) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |