US2747609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerometer testing device
Assignee: Westinghouse Air Brake Co
•
Filing: 1951-08-21
•
Granted: 1956-05-29
•
Expires: 1971-08-21
Abstract
No abstract record available.
Inventors
- 👤 Charles J Sekera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/228; G; G01; G01P; G01P15/00; G01P15/02; G01P15/03; G01P15/032; G01P15/034; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/8376
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1848562A
Cited
US975645A
Cited
US1088817A
Cited
US1227078A
Cited
US2540754A
Cited
US2531054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |