US2525629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge construction
Assignee: Merco Centrifugal Co
•
Filing: 1947-06-07
•
Granted: 1950-10-10
•
Expires: 1967-06-07
Abstract
No abstract record available.
Inventors
- 👤 Albert E Zimmerman
- 👤 Botke William Arms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:14
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2060239A
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US952653A
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US1158959A
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US1923454A
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US1847751A
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US1945786A
Cited
US2013668A
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US2081406A
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US2138468A
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US2282765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |