US2485209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge with primary and secondary zones of separation and process therefor
Assignee: Cherry Burrell Corp
•
Filing: 1943-07-16
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Granted: 1949-10-18
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Expires: 1963-07-16
Abstract
No abstract record available.
Inventors
- 👤 Ingie J Lundal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:20
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US736976A
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US1754774A
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AT120421B
Cited
US1893005A
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US1917422A
Cited
US2022814A
Cited
US2214831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |