US2613342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic braking circuits for electric motors
Assignee: AO Smith Corp
•
Filing: 1949-11-02
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Granted: 1952-10-07
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Expires: 1969-11-02
Abstract
No abstract record available.
Inventors
- 👤 George G Thompson
- 👤 Arthur J Vail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:37
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1555244A
Cited
US1754779A
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US2205252A
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US2380270A
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US2454986A
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US2445806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |