US2852667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overload control circuits for switch and lock movements
Assignee: Westinghouse Air Brake Co
•
Filing: 1953-05-26
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Granted: 1958-09-16
•
Expires: 1973-05-26
Abstract
No abstract record available.
Inventors
- 👤 Harvey A Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:53
CPC Classifications
B; B61; B61L; B61L5/00; B61L5/06; B61L5/062; B61L19/00; B61L19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1630667A
Cited
US1781880A
Cited
US2232545A
Cited
US2514694A
Cited
US2608647A
Cited
US2558032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |