US2654586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digging machine for mining coal
Assignee: Goodman Manufacturing Co LP
•
Filing: 1950-02-04
•
Granted: 1953-10-06
•
Expires: 1970-02-04
Abstract
No abstract record available.
Inventors
- 👤 Berry Charles Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:36
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE365168C
Cited
US2229912A
Cited
US1797024A
Cited
US1841907A
Cited
US2308517A
Cited
US2360803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |