Patent US2760831A successfully refreshed from Google Patents.
US2760831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft fastener
Assignee: Westinghouse Air Brake Co
•
Filing: 1952-03-25
•
Granted: 1956-08-28
•
Expires: 1972-03-25
Abstract
No abstract record available.
Inventors
- 👤 Walter B Kirk
- 👤 William S Johnston
- 👤 Harold G Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:27
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; B; B60; B60T; B60T8/00; B60T8/32; B60T8/72; B60T8/74; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32114; Y10T403/32221; Y10T403/32975; Y10T403/32983
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1736972A
Cited
US2114670A
Cited
US2406069A
Cited
US2453391A
Cited
US2531054A
Cited
US2473267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |