Patent US2236167A successfully refreshed from Google Patents.
Patent US2651698A successfully refreshed from Google Patents.
US2651698A
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Electric circuit controller
Assignee: Westinghouse Air Brake Co
•
Filing: 1948-12-27
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Granted: 1953-09-08
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Expires: 1968-12-27
Abstract
No abstract record available.
Inventors
- 👤 Jr William R Gracey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:46
CPC Classifications
B; B61; B61L; B61L5/00; B61L5/10; B61L5/102; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142
Claims Analysis
Total Claims: 0
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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) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |