US2622795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separator
Assignee: Black Clawson Co
•
Filing: 1948-10-30
•
Granted: 1952-12-23
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Expires: 1968-10-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
B; B04; B04B; B04B1/00; D; D21; D21D; D21D5/00; D21D5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1071870A
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GB191227528A
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US1144174A
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US1349881A
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US1737090A
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US1750395A
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US1818866A
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US2256316A
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US2269716A
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US2404884A
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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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |