US2772233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anaerobic digestion tanks with digesting mechanism
Assignee: Dorr Oliver Inc
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Filing: 1954-07-26
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Granted: 1956-11-27
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Expires: 1974-07-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:01
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/2866; C02F3/2873
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
THE METHOD OF TREATING A BODY OF ANAEROBICALLY DIGESTIBLE SEWAGE SLUDGE IN A ROUND DIGESTER TANK WHILD MAINTAINING A SUBSTANTIALLY CONSTANT SLUDGE LEVEL THEREIN AS FRESH SLUDGE IS BEING INTRODUCED INTO, AND DIGESTED SLUDGE BEING WITHDRAWN FROM TANK, AND WHILE SCUM FROM THE TOP STRATA OF SAID BODY IS BEING DEPRESSED INTO SAID BODY BY WAY OF A PLURALITY OF VERTICALLY INDUCED DOWNDRAFT STREAMS SPACED SUBSTANTIALLY UNIFORMLY FROM ONE ANOTHER ABOUT THE CENTER OF THE TANK, WHICH METHOD COMPRISES ORIENTING THE VERTICAL DOWNWARD DIRECTION OF EACH OF SAID STREAMS BY WAY OF GARDUAL TRANSITION INTO SUBSTANTIALLY HORIZONTAL DIRECTION, SO THAT THE RESPECTIVE HORIZONTAL DIRECTION OF SAID STREAMS ARE CODIRECTIONALLY DISPOSED AND ORIENTED WITH RESPECT TO THE TANK WALL AS WELL AS WITH RESPECT TO ONE ANOTHER, EACH AT AN ABTUSE ANGLE RELATIVE TO THE TANK RADIUS AS DEFINED BY TWO POINTS NAMELY THE VERTICAL AXIS OF THE RESPECTIVE VERTICAL DOWNDRAFT STREAM AND VERTICAL AXIS OF THE TANK, WHEREBY AN OUTWARD VELOCITY COMPONENT OF EACH RESPECTIVE HORI-
Claim 2
Independent Claim
166 words
THE METHOD OF TREATING A BODY OF ANAEROBICALLY DIGESTIBLE SEWAGE SLUDGE IN A ROUND DIGESTER TANK WHILD MAINTAINING A SUBSTANTIALLY CONSTANT SLUDGE LEVEL THEREIN AS FRESH SLUDGE IS BEING INTRODUCED INTO, AND DIGESTED SLUDGE BEING WITHDRAWN FROM TANK, AND WHILE SCUM FROM THE TOP STRATA OF SAID BODY IS BEING DEPRESSED INTO SAID BODY BY WAY OF A PLURALITY OF VERTICALLY INDUCED DOWNDRAFT STREAMS SPACED SUBSTANTIALLY UNIFORMLY FROM ONE ANOTHER ABOUT THE CENTER OF THE TANK, WHICH METHOD COMPRISES ORIENTING THE VERTICAL DOWNWARD DIRECTION OF EACH OF SAID STREAMS BY WAY OF GARDUAL TRANSITION INTO SUBSTANTIALLY HORIZONTAL DIRECTION, SO THAT THE RESPECTIVE HORIZONTAL DIRECTION OF SAID STREAMS ARE CODIRECTIONALLY DISPOSED AND ORIENTED WITH RESPECT TO THE TANK WALL AS WELL AS WITH RESPECT TO ONE ANOTHER, EACH AT AN ABTUSE ANGLE RELATIVE TO THE TANK RADIUS AS DEFINED BY TWO POINTS NAMELY THE VERTICAL AXIS OF THE RESPECTIVE VERTICAL DOWNDRAFT STREAM AND VERTICAL AXIS OF THE TANK, WHEREBY AN OUTWARD VELOCITY COMPONENT OF EACH RESPECTIVE HORI-
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |