US2688402A
Expired / Lapsed
US
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Apparatus and method for removing particles from a liquid
Assignee: Clevite Corp
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Filing: 1951-03-09
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Granted: 1954-09-07
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Expires: 1971-03-09
Abstract
No abstract record available.
Inventors
- 👤 John W Butterworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:33
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/28; B01D21/283; B01D21/003; B01D21/10; B01D21/12; B01D21/14; B01D21/24; B01D21/2405; B01D21/2416; B01D21/245; B01D21/2455; D; D21; D21F; D21F1/00; D21F1/66; Y; Y10; Y10S; Y10S159/00; Y10S159/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |