Patent US2544367A successfully refreshed from Google Patents.
US2544367A
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Centrifugal separator
Assignee: American Tool & Machine Co
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Filing: 1945-12-18
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Granted: 1951-03-06
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Expires: 1965-12-18
Abstract
No abstract record available.
Inventors
- 👤 John E Tholl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:52
CPC Classifications
B; B04; B04B; B04B9/00; B04B9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1334759A
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US1345596A
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US1536915A
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FR645181A
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US2060826A
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US2197990A
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US2176440A
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US2317528A
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US2411122A
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US2386701A
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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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |