Patent US2816219A successfully refreshed from Google Patents.
US2816219A
Expired / Lapsed
US
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Coded railway signaling system
Assignee: Westinghouse Air Brake Co
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Filing: 1953-12-21
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Granted: 1957-12-10
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Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Clifford D Ihrig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:27
CPC Classifications
B; B61; B61L; B61L23/00; B61L23/08; B61L23/14; B61L23/16; B61L23/168
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1125488A
Cited
US1383319A
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US1510486A
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US1631808A
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US1856754A
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US1869847A
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US2588005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |