US1530487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-pressure brake
Assignee: Westinghouse Air Brake Co
•
Filing: 1923-05-19
•
Granted: 1925-03-24
•
Expires: 1943-05-19
Abstract
No abstract record available.
Inventors
- 👤 Ellery R Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:38
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/04; B60T15/16; B60T17/00; B60T17/18; B60T17/20; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2668
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-03-23 | 1928-09-22 | 1929-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-03-23 | 1932-09-22 | 1933-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-03-23 | 1936-09-22 | 1937-03-24 | $7700.00 | Window Closed / Lapsed |