US2642394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage aerobic biological sewage treating process and system
Assignee: Infilco Inc
•
Filing: 1948-06-18
•
Granted: 1953-06-16
•
Expires: 1968-06-18
Abstract
No abstract record available.
Inventors
- 👤 Charles H Paulette
- 👤 Gunz Johanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:32
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/121; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A SEWAGE TREATING SYSTEM COMPRISING A FIRST BIOLOGICAL AEROBIC TREATING DEVICE, A CLARIFYING DEVICE AND A SECOND BIOLOGICAL AEROBIC TREATING DEVICE, SAID DEVICES BEING JOINED FOR FLOW THERETHROUGH IN THE SEQUENCE MENTIONED, INLET MEANS FOR SEWAGE TO BE TREATED TO SAID FIRST BIOLOGICAL AEROBIC TREATING DEVICE, AN OUTLET CONDUIT FOR UNSEDIMENTD EFFLUENT LEADING FROM SAID SECOND BIOLOGICAL AEROBIC TREATING DEVICE, MEANS INCLUDING A CONDUIT FOR RETURNING TO SAID FIRST BIOLOGICAL AEROBIC TREATING DEVICE UNSEDIMENTED EFFLUENT FROM SAID SECOND BIOLOGICAL AEROBIC TREATING DEVICE, AN OUTLET FOR SLUDGE FROM SAID CLARIFYING DEVICE, AND MEANS FOR WITHDRAWING TREATED SEWAGE FROM SAID SYSTEM DOWNSTREAM OF SAID CLARIFYING DEVICE.
Claim 2
Dependent Claim
104 words
A SEWAGE TREATING SYSTEM COMPRISING A FIRST BIOLOGICAL AEROBIC TREATING DEVICE, A CLARIFYING DEVICE AND A SECOND BIOLOGICAL AEROBIC TREATING DEVICE, SAID DEVICES BEING JOINED FOR FLOW THERETHROUGH IN THE SEQUENCE MENTIONED, INLET MEANS FOR SEWAGE TO BE TREATED TO SAID FIRST BIOLOGICAL AEROBIC TREATING DEVICE, AN OUTLET CONDUIT FOR UNSEDIMENTD EFFLUENT LEADING FROM SAID SECOND BIOLOGICAL AEROBIC TREATING DEVICE, MEANS INCLUDING A CONDUIT FOR RETURNING TO SAID FIRST BIOLOGICAL AEROBIC TREATING DEVICE UNSEDIMENTED EFFLUENT FROM SAID SECOND BIOLOGICAL AEROBIC TREATING DEVICE, AN OUTLET FOR SLUDGE FROM SAID CLARIFYING DEVICE, AND MEANS FOR WITHDRAWING TREATED SEWAGE FROM SAID SYSTEM DOWNSTREAM OF SAID CLARIFYING DEVICE.
References Cited (Backward Citations)
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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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |