Patent DE47727C successfully refreshed from Google Patents.
Patent US3220945A successfully refreshed from Google Patents.
US3220945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for sewage treatment and disposal
Assignee: Individual
•
Filing: 1963-03-01
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Granted: 1965-11-30
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Wilbur N Torpey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:02
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/30; C02F3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF TREATING SEWAGE TO DERIVE THEREFROM READILY DISPOSABLE DIGESTED SLUDGE, WHICH COMPRISES SUBJECTING THE SEWAGE TO CLARIFICATION TREATMENT PRODUCING EFFLUENT AND DILUENT SETTLED RAW SLUDGE CONTAINING RAW PUTRESCIBLE SOLIDS AND LIQUID, ADAPTED FOR ANAEROBIC DIGESTION TO PRODUCE SAID DIGESTED SLUDGE CONTAINING DIGESTED SOLIDS AND LIQUID; FEEDING SAID RAW SLUDGE TO A SEDIMENTATION THICKENING ZONE TO FORM THEREIN A BED OF SLUDGE IN THE PRESENCE OF A SUBSTANTIAL QUANTITY OF DIGESTED SOLIDS MIXED WITH THE RAW SOLIDS, KNEADIND THE SLUDGE IN SAID BED AND MOVING THE SLUDGE IN SAID THICKENING ZONE TO A DISCHARGE ZONE FOR WITHDRAWAL AND REMOVING SEPARATED LIQUID FROM SAID THICKENING ZONE; CONTROLLING THE THICKENING OPERATION SO THAT SAID SLUDGE BED YIELDS SAID SLUDGE MIXTURE CONCENTRATED TO A GEL STATE; MAINTAINING A BODY OF SLUDGE IN A STATE OF ANAEROBIC DIGESTION; FEEDING THE THICKENED SLUDGE MIXTURE FROM SAID BED INTO SAID BODY OF DIGESTING SLUDGE AND DISCHARGING THEREFROM A CORRESPONDING VOLUME
Claim 2
Independent Claim
155 words
THE METHOD OF TREATING SEWAGE TO DERIVE THEREFROM READILY DISPOSABLE DIGESTED SLUDGE, WHICH COMPRISES SUBJECTING THE SEWAGE TO CLARIFICATION TREATMENT PRODUCING EFFLUENT AND DILUENT SETTLED RAW SLUDGE CONTAINING RAW PUTRESCIBLE SOLIDS AND LIQUID, ADAPTED FOR ANAEROBIC DIGESTION TO PRODUCE SAID DIGESTED SLUDGE CONTAINING DIGESTED SOLIDS AND LIQUID; FEEDING SAID RAW SLUDGE TO A SEDIMENTATION THICKENING ZONE TO FORM THEREIN A BED OF SLUDGE IN THE PRESENCE OF A SUBSTANTIAL QUANTITY OF DIGESTED SOLIDS MIXED WITH THE RAW SOLIDS, KNEADIND THE SLUDGE IN SAID BED AND MOVING THE SLUDGE IN SAID THICKENING ZONE TO A DISCHARGE ZONE FOR WITHDRAWAL AND REMOVING SEPARATED LIQUID FROM SAID THICKENING ZONE; CONTROLLING THE THICKENING OPERATION SO THAT SAID SLUDGE BED YIELDS SAID SLUDGE MIXTURE CONCENTRATED TO A GEL STATE; MAINTAINING A BODY OF SLUDGE IN A STATE OF ANAEROBIC DIGESTION; FEEDING THE THICKENED SLUDGE MIXTURE FROM SAID BED INTO SAID BODY OF DIGESTING SLUDGE AND DISCHARGING THEREFROM A CORRESPONDING VOLUME
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |