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US2510781A
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Centrifugal separator
Assignee: Individual
•
Filing: 1947-11-03
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Granted: 1950-06-06
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Expires: 1967-11-03
Abstract
No abstract record available.
Inventors
- 👤 Charles W Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:22
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/12; D; D21; D21D; D21D5/00; D21D5/18
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) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |