US2653284A
Expired / Lapsed
US
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Motor-protection during dynamic braking
Assignee: Westinghouse Electric Corp
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Filing: 1952-06-26
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Granted: 1953-09-22
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Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 George R Purifoy
- 👤 Jr William L Barclay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:10
CPC Classifications
B; B60; B60L; B60L7/00; B60L7/02; B60L7/04; B60L3/00; B60L3/0023; B60L3/0061; B60L9/00; B60L9/02; B60L9/04; B60L2200/00; B60L2200/26; B60L2240/00; B60L2240/40; B60L2240/42; B60L2240/427; B60L2240/429; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |