US3275149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sewage pretreatment for outfall disposal
Assignee: FMC Corp
•
Filing: 1963-12-05
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Granted: 1966-09-27
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Expires: 1983-12-05
Abstract
No abstract record available.
Inventors
- 👤 Harvey F Ludwig
- 👤 Russell G Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:30
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
APPARATUS FOR TREATMENT OF SEWAGE FOR OUTFALL DISPOSAL WHICH COMPRISES A HOLDER FOR A MASS OF SEWAGE MATTER, AIR DISPERSING MEANS POSITIONED BELOW THE NORMAL LIQUID LEVEL IN SAID HOLDER, A CONDUIT FOR INTRODUCING INFLUENT SEWAGE INTO SAID HOLDER, A SKIMMING TANK OF INVERTED TRUNCATED CONE CONFIGURATION SPACED EXTERIORLY OF SAID HOLDER, A PERIPHERAL INFLUENT CHANNEL AT THE TOP OF SAID CONICAL SKIMMING TANK, CONDUIT MEANS INTERCONNECTING SAID HOLDER AND SAID PERIPHERAL CHANNEL FOR MOVEMENT OF AERATED SEWAGE FROM SAID HOLDER TO SAID PERIPHERAL CHANNEL, MEANS FOR FLOWING AERATED SEWAGE FROM SAID CHANNEL INTO SAID SKIMMING TANK, MEANS FOR REMOVING FLOATABLES FROM THE SURFACE OF THE AERATED SEWAGE IN SAID SKIMMING TANK, CONDUIT MEANS COMMUNICATING WITH THE SMALL END OF SAID CONICAL SKIMMING TANK FOR WITHDRAWING AND DISPOSING OF A SUSPENSION OF SOLIDS THEREFROM AND MEANS FOR RETURNING A PORTION OF THE SUSPENSION OF SOLIDS FROM SAID SKIMMING TANK TO A ZONE OF MIXING WITH INFLUENT SEWAGE BEING INTRODUCED IN SAID HOLDER.
Claim 2
Dependent Claim
162 words
APPARATUS FOR TREATMENT OF SEWAGE FOR OUTFALL DISPOSAL WHICH COMPRISES A HOLDER FOR A MASS OF SEWAGE MATTER, AIR DISPERSING MEANS POSITIONED BELOW THE NORMAL LIQUID LEVEL IN SAID HOLDER, A CONDUIT FOR INTRODUCING INFLUENT SEWAGE INTO SAID HOLDER, A SKIMMING TANK OF INVERTED TRUNCATED CONE CONFIGURATION SPACED EXTERIORLY OF SAID HOLDER, A PERIPHERAL INFLUENT CHANNEL AT THE TOP OF SAID CONICAL SKIMMING TANK, CONDUIT MEANS INTERCONNECTING SAID HOLDER AND SAID PERIPHERAL CHANNEL FOR MOVEMENT OF AERATED SEWAGE FROM SAID HOLDER TO SAID PERIPHERAL CHANNEL, MEANS FOR FLOWING AERATED SEWAGE FROM SAID CHANNEL INTO SAID SKIMMING TANK, MEANS FOR REMOVING FLOATABLES FROM THE SURFACE OF THE AERATED SEWAGE IN SAID SKIMMING TANK, CONDUIT MEANS COMMUNICATING WITH THE SMALL END OF SAID CONICAL SKIMMING TANK FOR WITHDRAWING AND DISPOSING OF A SUSPENSION OF SOLIDS THEREFROM AND MEANS FOR RETURNING A PORTION OF THE SUSPENSION OF SOLIDS FROM SAID SKIMMING TANK TO A ZONE OF MIXING WITH INFLUENT SEWAGE BEING INTRODUCED IN SAID HOLDER.
References Cited (Backward Citations)
US2098463A
Cited
US3173866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |