US2528649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment process
Assignee: Individual
•
Filing: 1948-04-27
•
Granted: 1950-11-07
•
Expires: 1968-04-27
Abstract
No abstract record available.
Inventors
- 👤 Albert L Genter
- 👤 Clyde C Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:03
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A SEWAGE TREATMENT SYSTEM HAVING PARTIAL DEWATERING OF FRESH SEWAGE SOLIDS BY PLAIN SEDIMENTATION, DIMINUTION OF THE QUANTITY OF SAID SOLIDS BY ANAEROBIC DIGESTION OPERATING IN SEPARATE PRIMARY AND SECONDARY STAGES FOLLOWED BY FURTHER DEWATERING OF THE DIGESTED SOLIDS IN MECHANICAL FILTERS, THE PROCESS OF AT LEAST TWICE INCREASING AND DECREASING THE RATIO OF WATER TO SLUDGE SOLIDS WHICH COMPRISES INCREASING SAID RATIO BY ACTIVE PRIMARY DIGESTION OF THE ORGANIC FRACTION OF THE FRESH SOLIDS DELIVERED TO DIGESTION, WITHDRAWING LIQUID DIGESTION PRODUCTS FROM THE PRIMARY STAGE, FURTHER INCREASING SAID RATIO BY DILUTING SAID PRODUCTS WITH WATER PURER THAN THE BIOCHEMICALLY FOULED DIGESTER LIQUOR CONTAINED IN SAID PRODUCTS, RECONCENTRATION OF THE SETTLEABLE SOLIDS IN A SPECIAL SETTLING BASIN, DECANTATION OF THE SUPERNATANT WATER THEREFROM, DISCARDING OF SAME, DELIVERY OF THE CONCENTRATED SOLIDS TO THE SECONDARY DIGESTION STAGE, WITH-
Claim 2
Dependent Claim
138 words
IN A SEWAGE TREATMENT SYSTEM HAVING PARTIAL DEWATERING OF FRESH SEWAGE SOLIDS BY PLAIN SEDIMENTATION, DIMINUTION OF THE QUANTITY OF SAID SOLIDS BY ANAEROBIC DIGESTION OPERATING IN SEPARATE PRIMARY AND SECONDARY STAGES FOLLOWED BY FURTHER DEWATERING OF THE DIGESTED SOLIDS IN MECHANICAL FILTERS, THE PROCESS OF AT LEAST TWICE INCREASING AND DECREASING THE RATIO OF WATER TO SLUDGE SOLIDS WHICH COMPRISES INCREASING SAID RATIO BY ACTIVE PRIMARY DIGESTION OF THE ORGANIC FRACTION OF THE FRESH SOLIDS DELIVERED TO DIGESTION, WITHDRAWING LIQUID DIGESTION PRODUCTS FROM THE PRIMARY STAGE, FURTHER INCREASING SAID RATIO BY DILUTING SAID PRODUCTS WITH WATER PURER THAN THE BIOCHEMICALLY FOULED DIGESTER LIQUOR CONTAINED IN SAID PRODUCTS, RECONCENTRATION OF THE SETTLEABLE SOLIDS IN A SPECIAL SETTLING BASIN, DECANTATION OF THE SUPERNATANT WATER THEREFROM, DISCARDING OF SAME, DELIVERY OF THE CONCENTRATED SOLIDS TO THE SECONDARY DIGESTION STAGE, WITH-
References Cited (Backward Citations)
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US2129266A
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US2190598A
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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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |