US2578484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-discharging sludge separator
Assignee: Individual
•
Filing: 1947-07-11
•
Granted: 1951-12-11
•
Expires: 1967-07-11
Abstract
No abstract record available.
Inventors
- 👤 Nyrop Aage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/14; B04B1/16; B04B1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |