US3183186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sludge conditioning
Assignee: Individual
•
Filing: 1962-04-11
•
Granted: 1965-05-11
•
Expires: 1982-04-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Oster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:24
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/12; C02F11/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN THE PROCESS FOR DEWATERING SEWAGE SLUDGE WHEREIN THE SLUDGE IS CONDITIONED,PRIOR TODEWATERING, BY TREATMENT WITH LIME AND FERROUS SULPHATE, THE IMPROVEMENT WHICH COMPRISES EFFECTING AT LEAST A PORTION OF THE CONDITIONING ACTION OF THE FERROUS SULPHATE WHILE THE SLUDGE IS AT A TEMPERATURE BETWEEN 95*F. AND 130*F. AND DEWATERING THE SLUDGE SO CONDITIONED.
Claim 2
Dependent Claim
54 words
IN THE PROCESS FOR DEWATERING SEWAGE SLUDGE WHEREIN THE SLUDGE IS CONDITIONED,PRIOR TODEWATERING, BY TREATMENT WITH LIME AND FERROUS SULPHATE, THE IMPROVEMENT WHICH COMPRISES EFFECTING AT LEAST A PORTION OF THE CONDITIONING ACTION OF THE FERROUS SULPHATE WHILE THE SLUDGE IS AT A TEMPERATURE BETWEEN 95*F. AND 130*F. AND DEWATERING THE SLUDGE SO CONDITIONED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |