US3342731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for dewatering sludges
Assignee: Individual
•
Filing: 1964-09-21
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Granted: 1967-09-19
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Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 Baumann Gotthold Paul
- 👤 Thomas Gunter Erich Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:47
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/12; C02F11/121; C02F11/127; C02F11/13; C02F11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR DEWATERING ORGANIC SLUDGES FROM THE TREATMENT OF WASTE WATER COMPRISING CENTRIFUGING THE SLUDGE INTO A HIGHLY DEWATERED CENTRIFUGE CAKE AND A CENTGRATE CONTAINING FINE AND COLOIDAL SOLIDS, ADDING SUFFICIENT ASH AND LIME TO SAID CENTRATE SO THAT THE LIME CAUSES A FLOCCULATION REACTION SUPPORTED BY THE ASH, AND FILTERING THE LIME AND ASH-TREATED CENTRATE TO RECOVER A FILTRATE SUBSTANTIALLY FREE OF SOLIDS AND A HIGHLY DEWATERED FILTER CAKE.
Claim 2
Dependent Claim
71 words
A PROCESS FOR DEWATERING ORGANIC SLUDGES FROM THE TREATMENT OF WASTE WATER COMPRISING CENTRIFUGING THE SLUDGE INTO A HIGHLY DEWATERED CENTRIFUGE CAKE AND A CENTGRATE CONTAINING FINE AND COLOIDAL SOLIDS, ADDING SUFFICIENT ASH AND LIME TO SAID CENTRATE SO THAT THE LIME CAUSES A FLOCCULATION REACTION SUPPORTED BY THE ASH, AND FILTERING THE LIME AND ASH-TREATED CENTRATE TO RECOVER A FILTRATE SUBSTANTIALLY FREE OF SOLIDS AND A HIGHLY DEWATERED FILTER CAKE.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |