Patent US2495950A successfully refreshed from Google Patents.
US2495950A
Expired / Lapsed
US
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Centrifugal bowl separator
Assignee: Werkspoor NV
•
Filing: 1946-01-26
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Granted: 1950-01-31
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Expires: 1966-01-26
Abstract
No abstract record available.
Inventors
- 👤 Werff Willem Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:19
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/02; B04B1/00; B04B1/10; B04B1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US489197A
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US499348A
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NL47361C
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US1469230A
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US1749291A
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DE553142C
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US1887476A
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US2144229A
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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) | 1953-01-30 | 1953-08-01 | 1954-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-30 | 1957-08-01 | 1958-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-30 | 1961-08-01 | 1962-01-31 | $7700.00 | Window Closed / Lapsed |