US2508639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical motor control apparatus with means for reducing motor speed to prevent coasting
Assignee: Honeywell Inc
•
Filing: 1943-12-30
•
Granted: 1950-05-23
•
Expires: 1963-12-30
Abstract
No abstract record available.
Inventors
- 👤 William J Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:43
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18; H02P3/24; H02P7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US609990A
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US1925882A
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DE587525C
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US2141056A
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US2119205A
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US2222947A
Cited
US2172064A
Cited
US2192022A
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US2304604A
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US2367746A
Cited
US2355537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |