Patent US2788196A successfully refreshed from Google Patents.
US2788196A
Expired / Lapsed
US
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Endless screw conveyors
Assignee: BASF SE
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Filing: 1952-11-21
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Granted: 1957-04-09
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Expires: 1972-11-21
Abstract
No abstract record available.
Inventors
- 👤 Jacobi Hans-Rudolf
- 👤 Beck Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:12
CPC Classifications
B; B65; B65G; B65G23/00; B65G2811/00; B65G2811/09; B65G2811/095; B65G2811/096; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19884
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US844210A
Cited
US2119162A
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US2346014A
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US2552572A
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US2545141A
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US2603084A
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US2630906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |