US2861877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of sewage sludge
Assignee: Modoc Peat Moss Co
•
Filing: 1954-07-22
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Granted: 1958-11-25
•
Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 Cecil J Geraghty
- 👤 Richard R Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:56
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/12; C02F11/16; C05; C05F; C05F17/00; C05F17/10; C05F7/00; C02F11/14; C02F11/147; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/20; Y02P; Y02P20/00; Y02P20/141; Y02P20/145; Y02W; Y02W30/00; Y02W30/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
IN THE TREATMENT OF SEWAGE SLUDGE TO FORM A COMPOST, THE IMPROVEMENT WHICH COMPRISES PLACING A LAYER OF LOOSE POROUS CELLULOSIC MATERIAL OVER A RELATIVELY FLAT BOTTOM OF A SHALLOW RESERVOIR PROVIDED WITH DRAINAGE, FLOODING THE LAYER IN THE RESERVOIR WITH SEWAGE SLUDGE CONTAINING FROM ABOUT 2% TO ABOUT 15% BY WEIGHT OF SOLIDS TO FORM A POOL OF SLUDGE IN THE RESERVOIR THAT IS SEVERAL TIMES DEEPER THAN THE LAYER BUT WITH THE LAYER BEING AT LEAST ONE QUARTER OF THE DEPTH OF THE POOL, PERMITTING THE FLOODED LAYER IN A QUIESCENT STATE TO DRAIN BY GRAVITY WHILE IT IS EXPOSED TO THE AIR SO THAT LIQUID IS REMOVED FROM THE POOL AND THE SOLIDS OF THE SLUDGE FILTER INTO AND IMPREGNATE THE LAYER AND ARE ALSO COMPOSTED, THE DRAINAGE BEING CONTINUED UNTIL THE IMPREGNATED CELLULOSIC MATERIAL CAN BE TILLED WITHOUT STICKING APPRECIABLY TO THE TILLING TOOL, THEREAFTER TILLING THE DRAINED IMPREGNATED LAYER IN PLACE IN THE RESERVOIR, AND REPEATING THE FLOODING AND DRAINAGE STEPS DESCRIBED ABOVE IN TURN OF THE ORDER OF FOUR TIMES UNTIL THE LAYER IS IMPREGNATED WITH ABOUT 3 TO ABOUT 5 PARTS BY WEIGHT OF SEWAGE SLUDGE FOR EACH PART BY WEIGHT OF CELLULOSIC MATERIAL.
Claim 2
Dependent Claim
201 words
IN THE TREATMENT OF SEWAGE SLUDGE TO FORM A COMPOST, THE IMPROVEMENT WHICH COMPRISES PLACING A LAYER OF LOOSE POROUS CELLULOSIC MATERIAL OVER A RELATIVELY FLAT BOTTOM OF A SHALLOW RESERVOIR PROVIDED WITH DRAINAGE, FLOODING THE LAYER IN THE RESERVOIR WITH SEWAGE SLUDGE CONTAINING FROM ABOUT 2% TO ABOUT 15% BY WEIGHT OF SOLIDS TO FORM A POOL OF SLUDGE IN THE RESERVOIR THAT IS SEVERAL TIMES DEEPER THAN THE LAYER BUT WITH THE LAYER BEING AT LEAST ONE QUARTER OF THE DEPTH OF THE POOL, PERMITTING THE FLOODED LAYER IN A QUIESCENT STATE TO DRAIN BY GRAVITY WHILE IT IS EXPOSED TO THE AIR SO THAT LIQUID IS REMOVED FROM THE POOL AND THE SOLIDS OF THE SLUDGE FILTER INTO AND IMPREGNATE THE LAYER AND ARE ALSO COMPOSTED, THE DRAINAGE BEING CONTINUED UNTIL THE IMPREGNATED CELLULOSIC MATERIAL CAN BE TILLED WITHOUT STICKING APPRECIABLY TO THE TILLING TOOL, THEREAFTER TILLING THE DRAINED IMPREGNATED LAYER IN PLACE IN THE RESERVOIR, AND REPEATING THE FLOODING AND DRAINAGE STEPS DESCRIBED ABOVE IN TURN OF THE ORDER OF FOUR TIMES UNTIL THE LAYER IS IMPREGNATED WITH ABOUT 3 TO ABOUT 5 PARTS BY WEIGHT OF SEWAGE SLUDGE FOR EACH PART BY WEIGHT OF CELLULOSIC MATERIAL.
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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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |