US2679477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment
Assignee: PROCESS ENGINEERS Inc
•
Filing: 1949-09-15
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Granted: 1954-05-25
•
Expires: 1969-09-15
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Kivari
- 👤 Earl M Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:38
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN CLARIFYING SEWAGE, THE IMPROVEMENT WHICH COMPRISES SIMULTANEOUSLY SETTLING AND FLOATING SOLIDS OUT OF A POOL OF THE SEWAGE HAVING AN UNCONFINED UPPER SURFACE BY INTRODUCING INTO A CONFINED STREAM OF THE SEWAGE UNDER A HYDRAULIC HEAD A SMALLER STREAM OF WATER CHARGED WITH GAS CONTAINING OXYGEN, AND INTRODUCING THE RESULTING MIXTURE INTO THE POOL ON WHICH THE HYDRAULIC HEAD IS LESS SO THAT THE GAS ESCAPS AS FINE BUBBLES IN THE POOL AND BUOYS UP SOME SOLIDS TO THE TOP OF THE POOL WHILE OTHER SOLIDS SINK IN THE POOL, AND REMOVING THE BUOYED-UP SOLIDS FROM THE TOP OF THE POOL.
Claim 2
Dependent Claim
102 words
IN CLARIFYING SEWAGE, THE IMPROVEMENT WHICH COMPRISES SIMULTANEOUSLY SETTLING AND FLOATING SOLIDS OUT OF A POOL OF THE SEWAGE HAVING AN UNCONFINED UPPER SURFACE BY INTRODUCING INTO A CONFINED STREAM OF THE SEWAGE UNDER A HYDRAULIC HEAD A SMALLER STREAM OF WATER CHARGED WITH GAS CONTAINING OXYGEN, AND INTRODUCING THE RESULTING MIXTURE INTO THE POOL ON WHICH THE HYDRAULIC HEAD IS LESS SO THAT THE GAS ESCAPS AS FINE BUBBLES IN THE POOL AND BUOYS UP SOME SOLIDS TO THE TOP OF THE POOL WHILE OTHER SOLIDS SINK IN THE POOL, AND REMOVING THE BUOYED-UP SOLIDS FROM THE TOP OF THE POOL.
References Cited (Backward Citations)
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Cited
US864856A
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US1069169A
Cited
GB191514733A
Cited
US2246224A
Cited
US2479403A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |