US2844779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic amplifier motor control system
Assignee: Individual
•
Filing: 1954-03-31
•
Granted: 1958-07-22
•
Expires: 1974-03-31
Abstract
No abstract record available.
Inventors
- 👤 Ernst F W Alexanderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:29
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/016; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2509738A
Cited
US2554203A
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US2636150A
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US2688724A
Cited
US2733306A
Cited
US2731521A
Cited
US2733307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |