Patent US2642845A successfully refreshed from Google Patents.
US2642845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston cushioning apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1950-12-20
•
Granted: 1953-06-23
•
Expires: 1970-12-20
Abstract
No abstract record available.
Inventors
- 👤 Roy R Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:37
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/223
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |