US3295682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment apparatus
Assignee: Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Filing: 1964-09-10
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Granted: 1967-01-03
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Expires: 1984-09-10
Abstract
No abstract record available.
Inventors
- 👤 Schramm Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:13
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1257; C02F3/14; C02F3/18; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A SEWAGE TREATMENT APPARATUS COMPRISING AN AERATION TANK PROVIDED WITH A SEWAGE INLET, AND A SEWAGE OUTLET MAINTAINING A PREDETERMINED LIQUID LEVEL THEREIN, AND WITH AT LEAST ONE AERATION ROTOR OF THE ROTATING BRUSH TYPE PROVIDED WITH AERATION ELEMENTS, WHICH ROTOR IS ROTATABLY MOUNTED ON A HORIZONTAL AXIS SITUATED OVER THE LIQUID LEVEL IN THE AERATION TANK WITH SAID AERATION ELEMENTS DIPPING BELOW SAID LIQUID LEVEL DURING ROTATION OF SAID ROTOR AND MEANS FOR ROTATING THE SAID ROTOR; A SEDIMENTATION TANK FOR THE AFTERTREATMENT OF THE SEWAGE TREATED IN THE AERATION TANK, SAID SEDIMENTATION TANK INCLUDING MEANS MAINTAINING A PREDETERMINED LIQUID LEVEL THEREIN AND BEING SITUATED IN SUCH A MANNER THAT DURING THE OPERATION OF THE APPARATUS THE LIQUID LEVEL IN THE SEDIMENTATION TANK IS HIGHER THAN THAT IN THE AERATION TANK; MEANS FOR CONVEYING TREATED SEWAGE FROM THE AERATION TANK INTO THE SEDIMENTATION TANK, WHICH MEANS COMPRISE AT LEAST ONE TROUGH WHICH IS MOUNTED ALONGSIDE OF SAID ROTOR SO AS TO COLLECT SEWAGE LIQUID SPLASHED UP BY SAID AERATION ELEMENTS OF SAID ROTOR; AND MEANS FOR RETURNING ACTIVATED SLUDGE FROM THE SEDIMENTATION TANK TO THE AERATION TANK.
Claim 2
Dependent Claim
188 words
A SEWAGE TREATMENT APPARATUS COMPRISING AN AERATION TANK PROVIDED WITH A SEWAGE INLET, AND A SEWAGE OUTLET MAINTAINING A PREDETERMINED LIQUID LEVEL THEREIN, AND WITH AT LEAST ONE AERATION ROTOR OF THE ROTATING BRUSH TYPE PROVIDED WITH AERATION ELEMENTS, WHICH ROTOR IS ROTATABLY MOUNTED ON A HORIZONTAL AXIS SITUATED OVER THE LIQUID LEVEL IN THE AERATION TANK WITH SAID AERATION ELEMENTS DIPPING BELOW SAID LIQUID LEVEL DURING ROTATION OF SAID ROTOR AND MEANS FOR ROTATING THE SAID ROTOR; A SEDIMENTATION TANK FOR THE AFTERTREATMENT OF THE SEWAGE TREATED IN THE AERATION TANK, SAID SEDIMENTATION TANK INCLUDING MEANS MAINTAINING A PREDETERMINED LIQUID LEVEL THEREIN AND BEING SITUATED IN SUCH A MANNER THAT DURING THE OPERATION OF THE APPARATUS THE LIQUID LEVEL IN THE SEDIMENTATION TANK IS HIGHER THAN THAT IN THE AERATION TANK; MEANS FOR CONVEYING TREATED SEWAGE FROM THE AERATION TANK INTO THE SEDIMENTATION TANK, WHICH MEANS COMPRISE AT LEAST ONE TROUGH WHICH IS MOUNTED ALONGSIDE OF SAID ROTOR SO AS TO COLLECT SEWAGE LIQUID SPLASHED UP BY SAID AERATION ELEMENTS OF SAID ROTOR; AND MEANS FOR RETURNING ACTIVATED SLUDGE FROM THE SEDIMENTATION TANK TO THE AERATION TANK.
References Cited (Backward Citations)
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US1820976A
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Cited
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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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |