US3300401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dewatering organic sludge which has been separated during treatment of waste water
Assignee: Individual
•
Filing: 1963-11-29
•
Granted: 1967-01-24
•
Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Sontheimer Heinrich
- 👤 Heinicke Dieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:50
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1221; C02F11/00; C02F11/12; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR DEWATERING ORGANIC SLUDGE WHICH HAS BEEN SEPARATED DURING TREATMENT OF WASTE WATER COMPRISING: MECHANICALLY SEPARATING A PORTION OF THE SOLIDS FROM THE SLUDGE IN HIGHLY DEWATERED FORM, LEAVING A SLUDGE-WATER MIXTURE CONTAINING FINE AND COLLOIDAL SOLIDS, PASSING SAID HIGHLY DEWATERED SOLIDS TO DISPOSAL, SUBJECTING SAID SLUDGE-WATER MIXTURE TO AEROBIC BIOLOGICAL TREATMENT FOR A PERIOD OF TIME SUFFICIENT TO OXIDIZE A MINIMUM OF 15% OF THE SOLIDS, THICKENING THE AEROBIC BIOLOGICALLY TREATED SLUDGEWATER MIXTURE INTO A CONCENTRATED SLUDGE-WATER FRACTION AND A WASTE WATER LARGELY FREED OF SOLIDS, REMOVING THE WASTE WATER LARGELY FREED OF SOLIDS FROM THE SYSTEM; AND SUBJECTING THE CONCENTRATED SLUDGE-WATER MIXTURE TO A FURTHER DEWATERING TREATMENT.
Claim 2
Dependent Claim
111 words
A PROCESS FOR DEWATERING ORGANIC SLUDGE WHICH HAS BEEN SEPARATED DURING TREATMENT OF WASTE WATER COMPRISING: MECHANICALLY SEPARATING A PORTION OF THE SOLIDS FROM THE SLUDGE IN HIGHLY DEWATERED FORM, LEAVING A SLUDGE-WATER MIXTURE CONTAINING FINE AND COLLOIDAL SOLIDS, PASSING SAID HIGHLY DEWATERED SOLIDS TO DISPOSAL, SUBJECTING SAID SLUDGE-WATER MIXTURE TO AEROBIC BIOLOGICAL TREATMENT FOR A PERIOD OF TIME SUFFICIENT TO OXIDIZE A MINIMUM OF 15% OF THE SOLIDS, THICKENING THE AEROBIC BIOLOGICALLY TREATED SLUDGEWATER MIXTURE INTO A CONCENTRATED SLUDGE-WATER FRACTION AND A WASTE WATER LARGELY FREED OF SOLIDS, REMOVING THE WASTE WATER LARGELY FREED OF SOLIDS FROM THE SYSTEM; AND SUBJECTING THE CONCENTRATED SLUDGE-WATER MIXTURE TO A FURTHER DEWATERING TREATMENT.
References Cited (Backward Citations)
US1999058A
Cited
US2359004A
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US2360811A
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US2615842A
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US2852584A
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US3151063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |