US2804975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening device having a rotating sieve drum
Assignee: Erich Netzsch GmbH and Co Holding KG
•
Filing: 1953-09-01
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Granted: 1957-09-03
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Expires: 1973-09-01
Abstract
No abstract record available.
Inventors
- 👤 Liebhart Max
- 👤 Bellinger Alwin
- 👤 Bruckner Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:02
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/18; B07B1/22; B07B1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US11637A
Cited
US223967A
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US882070A
Cited
US1994610A
Cited
US2283153A
Cited
US2416499A
Cited
US2570527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |