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US3393791A
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US
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Excavating system with movable hopper and feeding conveyor
Assignee: Demag Lauchhammer Maschinenbau und Stahbau GmbH
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Filing: 1967-02-16
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Granted: 1968-07-23
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 Heitzer Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:59
CPC Classifications
E; E02; E02F; E02F7/00; B; B65; B65G; B65G65/00; B65G65/02; B65G65/16; B65G65/20; B65G65/30; B65G65/34; B65G65/40; B65G65/42; B65G65/48; B65G65/489
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3358809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |