US2559917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge bowl with reciprocating valve for discharging solids from the bowl
Assignee: Individual
•
Filing: 1945-12-22
•
Granted: 1951-07-10
•
Expires: 1965-12-22
Abstract
No abstract record available.
Inventors
- 👤 Paul J Gresham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:27
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1321353A
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US273037A
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DE22085C
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US802473A
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US921371A
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US927059A
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US943083A
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US1132814A
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US1257235A
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GB129573A
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US1737090A
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US1695990A
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US1699055A
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US1960435A
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US1895104A
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US2104162A
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US2200202A
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US2467742A
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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) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |