US2701856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control for highway crossing gate mechanisms
Assignee: Westinghouse Air Brake Co
•
Filing: 1951-04-28
•
Granted: 1955-02-08
•
Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 Glen V Jefferson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:34
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; Y; Y10; Y10T; Y10T74/00; Y10T74/11; Y10T74/114
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US248434A
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US2310694A
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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) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |