US3175688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage-treatment plant for the biological purification of sewage
Assignee: Menzel and Co
•
Filing: 1961-02-10
•
Granted: 1965-03-30
•
Expires: 1981-02-10
Abstract
No abstract record available.
Inventors
- 👤 Zink Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:27
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A SEWAGE-TREATMENT PLANT FOR BIOLOGICAL PURIFICATION OF SEWAGE WITH THE AID OF ANAEROBIC BACTERIA. COMPRISING A SEWAGE-TREATMENT TANK FOR RECEIVING SEWAGE, AN IMMERSION VESSEL ARRANGED TO SERVE AS A BACTERIA BREEDING CHAMBER AND ADAPTED TO OPERATE AT A PREDETERMINED LEVEL WITHIN SAID TANK, SAID IMMERSION VESSEL COMPRISING AN APERTURED INVERTED FRUSTO-CONICAL BOTTOM PROVIDING OPEN UNRESTRICTED COMMUNICATION WITH SAID TANK TO DIRECT WITHIN THE IMMERSION VESSEL A SMALL PORTION OF THE SEWAGE, A DOME-SHAPED COVER HAVING A VENT OPENING ADAJCENT ITS APEX PROVIDING AN OUTLET FOR GASES GENERATED BY THE BACTERIA WITHIN THE VESSEL AND A TUBULAR PORTION LOCATED BETWEEN THE FRUSTO-CONICAL BOTTOM AND THE DOME-SHAPED COVER, SAID TUBULAR PORTION BEING APERTURED BELOW THE SEWAGE LEVEL TO PROVIDE PASSAGES THROUGH WHICH THE BACTERIA MIGRATE TO THE SEWAGE AND THERMOSTATICALLY CONTROLLED HEATING MEANS ARRANGED IN THE INTERIOR OF SAID IMMERSION VESSEL.
Claim 2
Dependent Claim
139 words
A SEWAGE-TREATMENT PLANT FOR BIOLOGICAL PURIFICATION OF SEWAGE WITH THE AID OF ANAEROBIC BACTERIA. COMPRISING A SEWAGE-TREATMENT TANK FOR RECEIVING SEWAGE, AN IMMERSION VESSEL ARRANGED TO SERVE AS A BACTERIA BREEDING CHAMBER AND ADAPTED TO OPERATE AT A PREDETERMINED LEVEL WITHIN SAID TANK, SAID IMMERSION VESSEL COMPRISING AN APERTURED INVERTED FRUSTO-CONICAL BOTTOM PROVIDING OPEN UNRESTRICTED COMMUNICATION WITH SAID TANK TO DIRECT WITHIN THE IMMERSION VESSEL A SMALL PORTION OF THE SEWAGE, A DOME-SHAPED COVER HAVING A VENT OPENING ADAJCENT ITS APEX PROVIDING AN OUTLET FOR GASES GENERATED BY THE BACTERIA WITHIN THE VESSEL AND A TUBULAR PORTION LOCATED BETWEEN THE FRUSTO-CONICAL BOTTOM AND THE DOME-SHAPED COVER, SAID TUBULAR PORTION BEING APERTURED BELOW THE SEWAGE LEVEL TO PROVIDE PASSAGES THROUGH WHICH THE BACTERIA MIGRATE TO THE SEWAGE AND THERMOSTATICALLY CONTROLLED HEATING MEANS ARRANGED IN THE INTERIOR OF SAID IMMERSION VESSEL.
References Cited (Backward Citations)
US1456557A
Cited
US1930457A
Cited
US1822021A
Cited
DE630242C
Cited
US2188847A
Cited
US2638444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |