Patent US2204815A successfully refreshed from Google Patents.
US2204815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load brake apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1939-03-31
•
Granted: 1940-06-18
•
Expires: 1959-03-31
Abstract
No abstract record available.
Inventors
- 👤 George K Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:26
CPC Classifications
B; B61; B61H; B61H13/00; B61H13/20; B61H13/30; B61H13/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1943-06-18 | 1943-12-18 | 1944-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-18 | 1947-12-18 | 1948-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-18 | 1951-12-18 | 1952-06-18 | $7700.00 | Window Closed / Lapsed |