US2545509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure throttle control apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1947-09-19
•
Granted: 1951-03-20
•
Expires: 1967-09-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Bent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:37
CPC Classifications
B; B61; B61C; B61C1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US498507A
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US528275A
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US585377A
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US653187A
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US1338379A
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US1839393A
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US2110702A
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US2418129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |