US2947519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussion drill
Assignee: Westinghouse Air Brake Co
•
Filing: 1957-09-11
•
Granted: 1960-08-02
•
Expires: 1977-09-11
Abstract
No abstract record available.
Inventors
- 👤 Jacob E Feucht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:18
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1053304A
Cited
US1345270A
Cited
US1499569A
Cited
US1692937A
Cited
US2333405A
Cited
US2665115A
Cited
US2661928A
Cited
US2810549A
Cited
US2851251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |