US2804169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separator
Assignee: Cleaver Brooks Co
•
Filing: 1954-10-11
•
Granted: 1957-08-27
•
Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Emmerich I Olah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:28
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B04; B04C; B04C7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2216389A
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US2569710A
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US2607438A
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US2666499A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |