US2440600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control
Assignee: RCA Corp
•
Filing: 1942-11-18
•
Granted: 1948-04-27
•
Expires: 1962-11-18
Abstract
No abstract record available.
Inventors
- 👤 Murray G Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:16
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1418; H; H02; H02P; H02P25/00; H02P25/02; H02P25/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390820A
Cited
US1586233A
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US2020275A
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US2170812A
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US2339861A
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US2250104A
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US2296092A
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US2297800A
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US2316317A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |