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US2491801A
Expired / Lapsed
US
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Centrifugal liquid cleaner
Assignee: Individual
•
Filing: 1946-06-05
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Granted: 1949-12-20
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Expires: 1966-06-05
Abstract
No abstract record available.
Inventors
- 👤 Debrey Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:00
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/003; B01D21/0036; B01D21/0039; B01D21/0042; B01D21/24; B01D21/2427; B01D21/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1301544A
Cited
US1753403A
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US1921689A
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US1818476A
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US1900394A
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US1972057A
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US2313896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |