US2724549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separator and method of operating the same
Assignee: Individual
•
Filing: 1951-04-09
•
Granted: 1955-11-22
•
Expires: 1971-04-09
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:33
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1923454A
Cited
US1846076A
Cited
US1847751A
Cited
US2013668A
Cited
US2323077A
Cited
US2559453A
Cited
US2616620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |