US3024908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for classifying granular material
Assignee: HARTMANN AG MASCHF
•
Filing: 1958-01-09
•
Granted: 1962-03-13
•
Expires: 1978-01-09
Abstract
No abstract record available.
Inventors
- 👤 Ibing Rolf
- 👤 Nagel Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:42
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US233375A
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US263472A
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US884551A
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GB367194A
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US2590691A
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US2529679A
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US2577295A
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US2649962A
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US2795329A
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US2829771A
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GB763808A
Cited
US2774476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |