Patent US1502295A successfully refreshed from Google Patents.
US3416623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tram drive unit for mining machine
Assignee: Westinghouse Air Brake Co
•
Filing: 1967-07-12
•
Granted: 1968-12-17
•
Expires: 1987-07-12
Abstract
No abstract record available.
Inventors
- 👤 William D Boone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:17
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/04; B60K17/10
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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |