US2580348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure brake apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1950-02-23
•
Granted: 1951-12-25
•
Expires: 1970-02-23
Abstract
No abstract record available.
Inventors
- 👤 Erik G Erson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:36
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/66; B60T13/665; B60T15/00; B60T15/02; B60T15/04; B60T15/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2081465A
Cited
US2299476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |