US2910281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prop and conveyer arrangement for mines
Assignee: Rheinstahl Wanheim GmbH
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Filing: 1957-10-17
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Granted: 1959-10-27
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Expires: 1977-10-17
Abstract
No abstract record available.
Inventors
- 👤 Wilkenloh Wilhelm
- 👤 Jager Erich
- 👤 Kuhnapfel Friedhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:57
CPC Classifications
E; E21; E21F; E21F13/00; E21F13/08; E21F13/086; E21D; E21D23/00; E21D23/006; E21D23/0073
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) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |