US2890764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for centrifugal separation with uni-directional flow at the point of separation
Assignee: Individual
•
Filing: 1953-12-07
•
Granted: 1959-06-16
•
Expires: 1973-12-07
Abstract
No abstract record available.
Inventors
- 👤 Gerald D Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:40
CPC Classifications
B; B04; B04C; B04C3/00
Claims Analysis
Total Claims: 0
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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) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |