US3298529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sludge removal means for sedimentation apparatus
Assignee: Eimco Corp
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Filing: 1964-05-18
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Granted: 1967-01-17
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Expires: 1984-05-18
Abstract
No abstract record available.
Inventors
- 👤 Harold D Longnecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:43
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/02; B01D21/04; B01D21/06; B01D21/24; B01D21/245; B01D21/30; B01D21/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
SEDIMENTATION APPARATUS COMPRISING A TANK ADAPTED TO HOLD A BODY OF LIQUID HAVING A PREDETERMINED NORMAL LIQUID LEVEL AND A SETTLED SLUDGE BLANKET AND HAVING A FEED INLET, A CLARIFIED EFFLUENT OUTLET AND SLUDGE REMOVAL MEANS; SAID SLUDGE REMOVAL MEANS COMPRISING A FIRST AND A SECOND SLUDGE RECEIVING COMPARTMENT THE BOTTOMS OF WHICH ARE BELOW SAID PREDETERMINED LIQUID LEVEL, A SLUDGE CONVEYING CONDUIT EXTENDING DOWNWARDLY FROM THE LOWER PORTION OF SAID FIRST SLUDGE RECEIVING COMPARTMENT TO THE LEVEL OF SETTLED SLUDGE IN SAID TANK FOR CONVEYING SAID SLUDGE TO SAID FIRST SLUDGE RECEIVING COMPARTMENT, MEANS FOR WITHDRAWING SLUDGE FROM SAID SECOND SLUDGE RECEIVING COMPARTMENT, AND PORT MEANS PROVIDING COMMUNICATION BETWEEN THE LOWER PORTIONS OF SAID FIRST AND SECOND SLUDGE RECEIVING COMPARTMENTS SAID PORT MEANS BEING ADJUSTABLE TO MAINTAIN A NORMAL SLUDGE LEVEL IN SAID FIRST SLUDGE RECEIVING COMPARTMENT ABOVE SAID PORT.
Claim 2
Dependent Claim
141 words
SEDIMENTATION APPARATUS COMPRISING A TANK ADAPTED TO HOLD A BODY OF LIQUID HAVING A PREDETERMINED NORMAL LIQUID LEVEL AND A SETTLED SLUDGE BLANKET AND HAVING A FEED INLET, A CLARIFIED EFFLUENT OUTLET AND SLUDGE REMOVAL MEANS; SAID SLUDGE REMOVAL MEANS COMPRISING A FIRST AND A SECOND SLUDGE RECEIVING COMPARTMENT THE BOTTOMS OF WHICH ARE BELOW SAID PREDETERMINED LIQUID LEVEL, A SLUDGE CONVEYING CONDUIT EXTENDING DOWNWARDLY FROM THE LOWER PORTION OF SAID FIRST SLUDGE RECEIVING COMPARTMENT TO THE LEVEL OF SETTLED SLUDGE IN SAID TANK FOR CONVEYING SAID SLUDGE TO SAID FIRST SLUDGE RECEIVING COMPARTMENT, MEANS FOR WITHDRAWING SLUDGE FROM SAID SECOND SLUDGE RECEIVING COMPARTMENT, AND PORT MEANS PROVIDING COMMUNICATION BETWEEN THE LOWER PORTIONS OF SAID FIRST AND SECOND SLUDGE RECEIVING COMPARTMENTS SAID PORT MEANS BEING ADJUSTABLE TO MAINTAIN A NORMAL SLUDGE LEVEL IN SAID FIRST SLUDGE RECEIVING COMPARTMENT ABOVE SAID PORT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |