Patent US3202286A successfully refreshed from Google Patents.
US3202286A
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Filtering apparatus
Assignee: N V Octrooien "activit" Mij
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Filing: 1962-05-14
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Granted: 1965-08-24
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Expires: 1982-05-14
Abstract
No abstract record available.
Inventors
- 👤 Smit Pieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:09
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/20; B01D24/26; B01D24/266; B01D24/38; B01D24/40; B01D24/402; B01D24/42; B01D24/425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A FILTERING APPARATUS OF THE UPFLOW TYPE, COMPRISING A HOUSING CONTAINING A FILTER BED OF GRANULAR SOLIDS WHICH ARE STATIC DURING NORMAL FILTERING OPERATION, INLET MEANS AND OUTLET MEANS RESPECTIVELY SUPPLYING A LIQUID TO SAID HOUSING AND REMOVING LIQUID FROM SAID HOUSING AT VERTICALLY SPACED APART LOCATIONS SO THAT THE LIQUID TO BE FILTERED IS PASSED UPWARDLY THROUGH SAID FILTER BED, AND AT LEAST ONE GRATING EXTENDING ACROSS SAID HOUSING WITHIN SAID FILTER BED, SAID GRATING BEING DISPOSED ADJACENT THE TOP OF THE FILTER BED AND SPACED DOWNWARDLY FROM THE TOP SURFACE OF THE LATTER AND ALSO BELOW SAID OUTLET MEANS, SAID GRATING HAVING AN OPEN AREA OF AT LEAST 75% OF THE CROSS-SECTIONAL AREA OF SAID HOUSING TO PERMIT A RELATIVELY HIGH RATE OF FLOW OF THE LIQUID THROUGH SAID FILTER BED WHILE PREVENTING CRACKING OF THE LATTER.
Claim 2
Dependent Claim
139 words
A FILTERING APPARATUS OF THE UPFLOW TYPE, COMPRISING A HOUSING CONTAINING A FILTER BED OF GRANULAR SOLIDS WHICH ARE STATIC DURING NORMAL FILTERING OPERATION, INLET MEANS AND OUTLET MEANS RESPECTIVELY SUPPLYING A LIQUID TO SAID HOUSING AND REMOVING LIQUID FROM SAID HOUSING AT VERTICALLY SPACED APART LOCATIONS SO THAT THE LIQUID TO BE FILTERED IS PASSED UPWARDLY THROUGH SAID FILTER BED, AND AT LEAST ONE GRATING EXTENDING ACROSS SAID HOUSING WITHIN SAID FILTER BED, SAID GRATING BEING DISPOSED ADJACENT THE TOP OF THE FILTER BED AND SPACED DOWNWARDLY FROM THE TOP SURFACE OF THE LATTER AND ALSO BELOW SAID OUTLET MEANS, SAID GRATING HAVING AN OPEN AREA OF AT LEAST 75% OF THE CROSS-SECTIONAL AREA OF SAID HOUSING TO PERMIT A RELATIVELY HIGH RATE OF FLOW OF THE LIQUID THROUGH SAID FILTER BED WHILE PREVENTING CRACKING OF THE LATTER.
References Cited (Backward Citations)
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US2119923A
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US2268607A
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |