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US2858024A
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Liquid filter backwash condition measurement
Assignee: Schneider Electric Systems USA Inc
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Filing: 1955-01-20
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Granted: 1958-10-28
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Expires: 1975-01-20
Abstract
No abstract record available.
Inventors
- 👤 Russell H Babcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:26
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/20; B01D24/22; B01D24/38; B01D24/40; B01D24/46; B01D24/4631; B01D24/4642; B01D24/48; B01D24/4884
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1892951A
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US2376912A
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US2366903A
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US2606863A
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US2614424A
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US2535569A
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US2632566A
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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) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |