US3248323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste treatment with anaerobic digestion
Assignee: Dorr Oliver Inc
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Filing: 1964-11-16
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Granted: 1966-04-26
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Expires: 1984-11-16
Abstract
No abstract record available.
Inventors
- 👤 Orris E Albertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:05
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/38; C02F1/385; C02F3/00; C02F3/28; Y; Y10; Y10S; Y10S494/00; Y10S494/90
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
THE METHOD OF DISPOSAL OF A SUSPENSION OF PUTRESCIBLE WASTE MATTER THROUGH ANAEROBIC DIGESTION, WHICH COMPRISES SUBJECTING THE SUSPENSION TO CONTINUOUS SEDIMENTATION TO FORM A SLUDGE BED SUBJACENT TO A BODY OF SEPARATED LIQUOR; MAINTAINING A BODY OF DIGESTING SLUDGE; FEEDING SLUDGE FROM SAID SLUDGE BED TO SAID BODY OF DIGESTING SLUDGE AT A RATE ADAPTED BO PRODUCE INCOMPLETELY DIGESTED SLUDGE FOR DISCHARGE FROM THE DIGESTER; SUBJECTING INCOMPLETELY DIGESTED SLUDGE DISCHARGED FROM SAID BODY OF DIGESTING SLUDGE TO CENTRIFUGAL SEPARATION TREATMENT CONTROLLED FOR DELIVERING A CAKE AMTERIAL SUBSTANTIALLY CONTAINING THE DIGESTED SOLIDS, AND AN OVERFLOW SUBSTANTIALLY CONTAINING THE UNDIGESTED SOLIDS; AND INTRODUCING SAID OVERFLOW DIRECTLY INTO SAID BED OF SLUDGE TO EFFECT ENTRAPMENT AND RETENTION THEREIN OF UNDIGESTED SOLIDS.
References Cited (Backward Citations)
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |