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Patent US2841379A successfully refreshed from Google Patents.
US2841379A
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Mining apparatus and automatic feed control therefor
Assignee: Goodman Manufacturing Co LP
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Filing: 1956-12-07
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Granted: 1958-07-01
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Expires: 1976-12-07
Abstract
No abstract record available.
Inventors
- 👤 Herman W Driehaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:45
CPC Classifications
E; E21; E21C; E21C29/00; E21C29/22; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/17; Y10T408/172
Claims Analysis
Total Claims: 0
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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) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |