Patent US3419313A successfully refreshed from Google Patents.
US3419313A
Expired / Lapsed
US
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Coal cutter with vibratory drive
Assignee: Gewerkschaft Eisenhutte Westfalia GmbH
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Filing: 1967-05-05
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Granted: 1968-12-31
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Expires: 1987-05-05
Abstract
No abstract record available.
Inventors
- 👤 Ulusal Nuriye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:10
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/46; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18344
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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |