US2750040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separation
Assignee: Western States Machine Co
•
Filing: 1951-12-22
•
Granted: 1956-06-12
•
Expires: 1971-12-22
Abstract
No abstract record available.
Inventors
- 👤 Philippe P Strich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:36
CPC Classifications
B; B04; B04B; B04B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US364941A
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US459197A
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US650832A
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US1546871A
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US1933644A
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US2096594A
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US2104162A
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US2113321A
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US2232768A
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US2254455A
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US2517820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |