Patent US2924489A successfully refreshed from Google Patents.
US2924489A
Expired / Lapsed
US
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Process and apparatus for conveying finely divided material
Assignee: Individual
•
Filing: 1957-02-27
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Granted: 1960-02-09
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Expires: 1977-02-27
Abstract
No abstract record available.
Inventors
- 👤 Beckmann Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:49
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/16; B65G53/18; B65G53/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734782A
Cited
US1616547A
Cited
US2032367A
Cited
US2191096A
Cited
US2258125A
Cited
US2587670A
Cited
US2739845A
Cited
US2707132A
Cited
FR1074419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |