US2447713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake and sanding control apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1945-03-03
•
Granted: 1948-08-24
•
Expires: 1965-03-03
Abstract
No abstract record available.
Inventors
- 👤 George K Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:02
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/72; B60T8/74; B61; B61H; B61H11/00; B61H11/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US608100A
Cited
US951312A
Cited
US2198022A
Cited
US2198031A
Cited
US2208739A
Cited
US2243450A
Cited
US2366044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |