US2661332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment
Assignee: JBS USA LLC
•
Filing: 1949-09-29
•
Granted: 1953-12-01
•
Expires: 1969-09-29
Abstract
No abstract record available.
Inventors
- 👤 Everett N Mortenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:20
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5263; C02F1/5236; C02F3/00; C02F3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE PROCESS OF TREATING RAW WASTES, WHICH COMPRISES: MIXING A FRESH, UNSETTLED RAW WASTE OF HIGH SOLIDS CONTENT WITH A SUBSTANTIAL PORTION OF ACTIVE ANAEROBIC SLUDGE FROM A DIGESTER; ADJUSTING THE PH OF THE MIXTURE THUS FORMED TO AT LEAST PH 7 AND AGITATING TO FLOCCULATE THE SUSPENDED SOLIDS IN SAID RAW WASTE; THEREAFTER SETTLING THE RESULTING MIXTURE TO PRODUCE A SUPERNANTANT LIQUID SUBSTANTIALLY FREE OF SUSPENDED SOLIDS AND A SETTLED SLUDGE; SEPARATING SAID SETTLED SLUDGE FROM SAID SUPERNANTANT LIQUID AND DELIVERING THE SEPARATED SLUDGE TO A DIGESTER; SUBJECTING SAID SEPARATED SLUDGE TO ANAEROBIC DIGESTION IN SAID DIGESTER; DISCHARGING A PORTION OF THE ACTIVE ANAEORBIC DIGESTED SLUDGE FROM THE PROCESS; AND RETURNING A SUBSTANTIAL PORTION OF SAID ACTIVE ANAEORBIC DIGESTED SLUDGE FOR ADMIXTURE WITH SAID INCOMING RAW WASTE.
Claim 2
Dependent Claim
128 words
THE PROCESS OF TREATING RAW WASTES, WHICH COMPRISES: MIXING A FRESH, UNSETTLED RAW WASTE OF HIGH SOLIDS CONTENT WITH A SUBSTANTIAL PORTION OF ACTIVE ANAEROBIC SLUDGE FROM A DIGESTER; ADJUSTING THE PH OF THE MIXTURE THUS FORMED TO AT LEAST PH 7 AND AGITATING TO FLOCCULATE THE SUSPENDED SOLIDS IN SAID RAW WASTE; THEREAFTER SETTLING THE RESULTING MIXTURE TO PRODUCE A SUPERNANTANT LIQUID SUBSTANTIALLY FREE OF SUSPENDED SOLIDS AND A SETTLED SLUDGE; SEPARATING SAID SETTLED SLUDGE FROM SAID SUPERNANTANT LIQUID AND DELIVERING THE SEPARATED SLUDGE TO A DIGESTER; SUBJECTING SAID SEPARATED SLUDGE TO ANAEROBIC DIGESTION IN SAID DIGESTER; DISCHARGING A PORTION OF THE ACTIVE ANAEORBIC DIGESTED SLUDGE FROM THE PROCESS; AND RETURNING A SUBSTANTIAL PORTION OF SAID ACTIVE ANAEORBIC DIGESTED SLUDGE FOR ADMIXTURE WITH SAID INCOMING RAW WASTE.
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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) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |