US2963109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal type separating apparatus
Assignee: Individual
•
Filing: 1957-02-11
•
Granted: 1960-12-06
•
Expires: 1977-02-11
Abstract
No abstract record available.
Inventors
- 👤 Roger S Brookman
- 👤 Charles L Maisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:27
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/24; B04C5/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AT32647B
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US1668872A
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US1930806A
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US1811597A
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US2039115A
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US2347731A
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US2339416A
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DE875753C
Cited
US2471326A
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US2869677A
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US2799354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |