US2584749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical relay
Assignee: Westinghouse Air Brake Co
•
Filing: 1947-08-28
•
Granted: 1952-02-05
•
Expires: 1967-08-28
Abstract
No abstract record available.
Inventors
- 👤 Clarence S Snavely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:30
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2145821A
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US2057605A
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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) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |