US3135686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for the treatment of sewage
Assignee: Control Mortgage and Housing Corp
•
Filing: 1961-09-07
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Granted: 1964-06-02
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Expires: 1981-09-07
Abstract
No abstract record available.
Inventors
- 👤 Lorne A Campbell
- 👤 Duncan K Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:33
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1242; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD FOR THE TREATMENT OF SEWAGE COMPRISING THE STEPS OF DISCHARGING WASTE AND AN AQUEOUS CARRIER LIQUID INTO AN AERATING AREA, AERATING THE DISCHARGED LIQUID IN SAID AERATING AREA TO AEROBICALLY DECOMPOSE WASTE THEREIN, TRANSFERRING LIQUID FROM SAID AERATING AREA TO A SETTLING AREA, ALLOWING PARTICLES OF SOLIDS TO SETTLE DOWNWARDS AND FLOAT UPWARDS IN THE LIQUID IN SAID SETTLING AREA AS A SLUDGE, RETURNING SUBSTANTIALLY ALL THE SLUDGE AND LIQUID IN SAID SETTLING AREA TO SAID AERATING AREA AT PERIODICALLY SPACED INTERVALS, AND DISCHARGING SUPERNATANT LIQUID FROM SAID SETTLING AREA AT TIMES OTHER THAN SAID INTERVALS.
Claim 2
Independent Claim
98 words
A METHOD FOR THE TREATMENT OF SEWAGE COMPRISING THE STEPS OF DISCHARGING WASTE AND AN AQUEOUS CARRIER LIQUID INTO AN AERATING AREA, AERATING THE DISCHARGED LIQUID IN SAID AERATING AREA TO AEROBICALLY DECOMPOSE WASTE THEREIN, TRANSFERRING LIQUID FROM SAID AERATING AREA TO A SETTLING AREA, ALLOWING PARTICLES OF SOLIDS TO SETTLE DOWNWARDS AND FLOAT UPWARDS IN THE LIQUID IN SAID SETTLING AREA AS A SLUDGE, RETURNING SUBSTANTIALLY ALL THE SLUDGE AND LIQUID IN SAID SETTLING AREA TO SAID AERATING AREA AT PERIODICALLY SPACED INTERVALS, AND DISCHARGING SUPERNATANT LIQUID FROM SAID SETTLING AREA AT TIMES OTHER THAN SAID INTERVALS.
References Cited (Backward Citations)
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Cited
US2709680A
Cited
US2777816A
Cited
US2798228A
Cited
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Cited
US2987186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |