US2052199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric brake device
Assignee: Westinghouse Air Brake Co
•
Filing: 1933-11-07
•
Granted: 1936-08-25
•
Expires: 1953-11-07
Abstract
No abstract record available.
Inventors
- 👤 George W Baughman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:03
CPC Classifications
B; B60; B60L; B60L7/00; B60L7/24; B60L7/28; B60L2220/00; B60L2220/40; B60L2220/44; B60L2240/00; B60L2240/10; B60L2240/12; B60L2240/36
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) | 1939-08-25 | 1940-02-24 | 1940-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-08-25 | 1944-02-24 | 1944-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-08-25 | 1948-02-24 | 1948-08-25 | $7700.00 | Window Closed / Lapsed |