Patent US4312652A successfully refreshed from Google Patents.
Patent US2721173A successfully refreshed from Google Patents.
US2721173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treating apparatus
Assignee: General Filter Co
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Filing: 1952-02-23
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Granted: 1955-10-18
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Expires: 1972-02-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Lawlor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:52
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A WATER-TREATING APPARATUS PROVIDING A SEDIMENTATION CHAMBER ADAPTED FOR MAINTAINING A SUSPENDED LAYER OF SLUDGE PARTICLES THEREIN, MEANS FORMING A SLUDGECOLLECTING POCKET WITHIN SAID CHAMBER HAVING ITS MOUTH OPENING UPWARDLY AND POSITIONED AT A LEVEL NORMALLY BELOW THE TOP OF SAID LAYER AND ARRANGED SO THAT PARTICLES OF SLUDGE DESCEND INTO SAID POCKET, SAID MEANS BEING MOUNTED FOR ROTATION ABOUT A VERTICALLY-EXTENDING AXIS, A STATIONARY MEMBER WITHIN SAID POCKET SUPPORTED AND ARRANGED FOR STIRRING THE SLUDGE WITHIN SAID POCKET DURING THE ROTATION OF SAID POCKET THEREABOUT TO THICKEN SAID SLUDGE AS IT MOVES TOWARDS THE LOWER PORTION OF SAID POCKET, MEANS FOR ROTATING SAID POCKET, AND MEANS FOR WITHDRAWING THE THICKENING SLUDGE FROM THE LOWER PORTION OF SAID POCKET.
Claim 2
Dependent Claim
120 words
IN A WATER-TREATING APPARATUS PROVIDING A SEDIMENTATION CHAMBER ADAPTED FOR MAINTAINING A SUSPENDED LAYER OF SLUDGE PARTICLES THEREIN, MEANS FORMING A SLUDGECOLLECTING POCKET WITHIN SAID CHAMBER HAVING ITS MOUTH OPENING UPWARDLY AND POSITIONED AT A LEVEL NORMALLY BELOW THE TOP OF SAID LAYER AND ARRANGED SO THAT PARTICLES OF SLUDGE DESCEND INTO SAID POCKET, SAID MEANS BEING MOUNTED FOR ROTATION ABOUT A VERTICALLY-EXTENDING AXIS, A STATIONARY MEMBER WITHIN SAID POCKET SUPPORTED AND ARRANGED FOR STIRRING THE SLUDGE WITHIN SAID POCKET DURING THE ROTATION OF SAID POCKET THEREABOUT TO THICKEN SAID SLUDGE AS IT MOVES TOWARDS THE LOWER PORTION OF SAID POCKET, MEANS FOR ROTATING SAID POCKET, AND MEANS FOR WITHDRAWING THE THICKENING SLUDGE FROM THE LOWER PORTION OF SAID POCKET.
References Cited (Backward Citations)
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Cited
US2021672A
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US2127314A
Cited
US2276300A
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US2296437A
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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) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |