Patent US2847379A successfully refreshed from Google Patents.
US2847379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treating sewage sludge
Assignee: Chicago Pump Co
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Filing: 1952-05-31
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Granted: 1958-08-12
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Expires: 1972-05-31
Abstract
No abstract record available.
Inventors
- 👤 Spiegel Milton
- 👤 Miles A Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:26
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A SEWAGE SLUDGE DIGESTION APPARATUS, A HEATER TANK COMPRISING TWO COMPARTMENTS WITH AN INLET LEADING TO ONE OF SAID COMPARTMENTS AND AN OUTLET LEADING FROM THE OTHER, A WEIR SEPARATING SAID COMPARTMENTS, THE TOP EDGE OF SAID WEIR EXTENDING HIGH ENOUGH TO PREVENT SLUDGE ENTERING SAID INLET FROM PASSING DIRECTLY THROUGH SAID OUTLET, AND A BURNER IN SAID ONE COMPARTMENT, SAID BURNER HAVING PORTS POSITIONED BELOW THE LEVEL OF THE TOP EDGE OF SAID WEIR WHEREBY SLUDGE IN SAID ONE COMPARTMENT IS HEATED BY SAID BURNER BEFORE IT PASSES OVER SAID WEIR INTO SAID OTHER COMPARTMENT.
Claim 2
Dependent Claim
97 words
IN A SEWAGE SLUDGE DIGESTION APPARATUS, A HEATER TANK COMPRISING TWO COMPARTMENTS WITH AN INLET LEADING TO ONE OF SAID COMPARTMENTS AND AN OUTLET LEADING FROM THE OTHER, A WEIR SEPARATING SAID COMPARTMENTS, THE TOP EDGE OF SAID WEIR EXTENDING HIGH ENOUGH TO PREVENT SLUDGE ENTERING SAID INLET FROM PASSING DIRECTLY THROUGH SAID OUTLET, AND A BURNER IN SAID ONE COMPARTMENT, SAID BURNER HAVING PORTS POSITIONED BELOW THE LEVEL OF THE TOP EDGE OF SAID WEIR WHEREBY SLUDGE IN SAID ONE COMPARTMENT IS HEATED BY SAID BURNER BEFORE IT PASSES OVER SAID WEIR INTO SAID OTHER COMPARTMENT.
References Cited (Backward Citations)
US625605A
Cited
US1820976A
Cited
US2516076A
Cited
US2538412A
Cited
US2594433A
Cited
US2542602A
Cited
US2572767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |