US3307702A
Expired / Lapsed
US
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Sludge blanket clarifier for water treatment
Assignee: Czech Academy of Sciences
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Filing: 1964-08-26
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Granted: 1967-03-07
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Expires: 1984-08-26
Abstract
No abstract record available.
Inventors
- 👤 Mackrle Svatopluk
- 👤 Mackrle Vladimir
- 👤 Dracka Oldrich
- 👤 Paseka Lubomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:09
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; B; B01; B01D; B01D21/00; B01D21/0012
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
A WATER TREATMENT APPARATUS, COMPRISING, IN COMBINATION, A HOUSING CONTAINING A PLURALITY OF SIMILAR CLARIFYING UNITS EACH INCLUDING A DOWNWARDLY DIVERGING FIRST COMPARTMENT CONSTITUTING A COAGULATION ZONE, AN UPWARDLY DIVERGING SECOND COMPARTMENT CONSTITUTING A FILTRATION ZONE, AND A DOWNWARDLY DIVERGING THIRD COMPARTMENT CONSTITUTING A SEDIMENTATION ZONE, SAID HOUSING DEFINING UPWARDLY OF SAID UNITS A CLEAR-WATER COLLECTION ZONE; FEED MEANS FOR FEEDING A MIXTURE OF RAW WATER AND A COAGULATION AGENT DOWNWARDLY INTO EACH FIRST COMPARTMENT FOR INDUCING COAGULATION THEREIN; AND MEANS
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |