US2800579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined manual and automatic route control system for railroads
Assignee: Westinghouse Air Brake Co
•
Filing: 1954-07-09
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Granted: 1957-07-23
•
Expires: 1974-07-09
Abstract
No abstract record available.
Inventors
- 👤 Paul N Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:22
CPC Classifications
B; B61; B61L; B61L25/00; B61L25/02; B61L25/04; B61L19/00; B61L19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2206550A
Cited
US2122358A
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US2255142A
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US2520838A
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US2656455A
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US2700728A
Cited
US2670434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |