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US2955809A
Expired / Lapsed
US
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Mining planers having an impact action
Assignee: Gewerkschaft Eisenhutte Westfalia GmbH
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Filing: 1958-07-08
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Granted: 1960-10-11
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Expires: 1978-07-08
Abstract
No abstract record available.
Inventors
- 👤 Herrmann Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:58
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR486895A
Cited
GB161005A
Cited
DE862433C
Cited
GB622923A
Cited
US2614476A
Cited
GB717033A
Cited
US2690903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |