Patent US2823023A successfully refreshed from Google Patents.
US2823023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring type mining machine having horizontally extending trimmer bar
Assignee: Goodman Manufacturing Co LP
•
Filing: 1956-11-01
•
Granted: 1958-02-11
•
Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 Emil J Hlinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:00
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/10; E21C27/12; E21C27/124
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |