Patent US2901231A successfully refreshed from Google Patents.
US2901231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussive core breaking device for boring type miners
Assignee: Goodman Manufacturing Co LP
•
Filing: 1958-05-05
•
Granted: 1959-08-25
•
Expires: 1978-05-05
Abstract
No abstract record available.
Inventors
- 👤 Loy D Hagenbook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:15
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB135179A
Cited
US2677537A
Cited
US2743092A
Cited
US2750178A
Cited
US2750177A
Cited
US2823025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |