US2645766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway warning light control system
Assignee: Pyle National Co
•
Filing: 1948-12-31
•
Granted: 1953-07-14
•
Expires: 1968-12-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Mcdowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:17
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/44; B60Q1/445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2305414A
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US2432388A
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US2445873A
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US2456286A
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US2439474A
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US2535384A
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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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |