US2572767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for digesting garbage and sewage sludge
Assignee: Pacific Flush Tank Co
•
Filing: 1948-11-18
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Granted: 1951-10-23
•
Expires: 1968-11-18
Abstract
No abstract record available.
Inventors
- 👤 Harry E Schlenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:03
CPC Classifications
C; C05; C05F; C05F7/00; C02; C02F; C02F3/00; C02F3/28; C05F9/00; C05F9/02; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/20; Y02W; Y02W30/00; Y02W30/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
THE METHOD OF DIGESTING SEWAGE SLUDGE AND GARBAGE SIMULTANEOUSLY WHICH COMPRISES THE STEPS OF FEEDING SEWAGE SLUDGE TO A DIGESTION ZONE SUBSTANTIALLY SEALED AGAINST THE ADMISSION OF AIR FOR ANAEROBIC DIGESTION THEREIN, FEEDING GARBAGE TO A DIGESTION ZONE SEPARATED AND DISTINCT FROM SAID SEWAGE SLUDGE DIGESTION ZONE AND SUBSTANTIALLY SEALED AGAINST THE ADMISSION OF AIR FOR ANAEROBIC DIGESTION THEREIN, WITHDRAWING DIGESTER LIQUOR FROM SAID SEWAGE SLUDGE DIGESTION ZONE, CONTINUALLY SUPPLYING SUCH WITHDRAWN DIGESTER LIQUOR TO SAID GARBAGE DIGESTION ZONE AT A RATE SUFFICIENT TO AMINTAIN ANAEROBIC DIGESTION OF THE GARBAGE IN SAID GARBAGE DIGESTION ZONE, HEATING SAID WITHDRAWN LIQUOR OF DIGESTION TO A TEMPERATURE WHEREBY WHEN SUCH HEATED LIQUID IS MIXED WITH THE CONTENTS OF THE GARBAGE DIGESTION ZONE THE TEMPERATURE OF SAID CONTENTS IS APPROXIMATELY THE OPTIMUM FOR DIGESTION, RETURNING OVERFLOW DIGESTER LIQUOR FROM SAID GARBAGE DIGESTION ZONE TO SAID SEWAGE SLUDGE DIGESTION ZONE FOR REMIXTURE WITH AND CONDITIONING SIMILARLY TO THE DIGESTER LIQUO RIN SAID SEWAGE SLUDGE DIGESTION ZONE, DISCHARBING OVERFLOW LIQUOR AND DIGESTED SLUDGE FROM SAID SEWATE SLUDGE DIGESTION ZONE, AND DISCHARGING NON-DIGESTIBLE RESIDUE FROM SAID GARBAGE DIGESTION ZONE.
Claim 2
Independent Claim
182 words
THE METHOD OF DIGESTING SEWAGE SLUDGE AND GARBAGE SIMULTANEOUSLY WHICH COMPRISES THE STEPS OF FEEDING SEWAGE SLUDGE TO A DIGESTION ZONE SUBSTANTIALLY SEALED AGAINST THE ADMISSION OF AIR FOR ANAEROBIC DIGESTION THEREIN, FEEDING GARBAGE TO A DIGESTION ZONE SEPARATED AND DISTINCT FROM SAID SEWAGE SLUDGE DIGESTION ZONE AND SUBSTANTIALLY SEALED AGAINST THE ADMISSION OF AIR FOR ANAEROBIC DIGESTION THEREIN, WITHDRAWING DIGESTER LIQUOR FROM SAID SEWAGE SLUDGE DIGESTION ZONE, CONTINUALLY SUPPLYING SUCH WITHDRAWN DIGESTER LIQUOR TO SAID GARBAGE DIGESTION ZONE AT A RATE SUFFICIENT TO AMINTAIN ANAEROBIC DIGESTION OF THE GARBAGE IN SAID GARBAGE DIGESTION ZONE, HEATING SAID WITHDRAWN LIQUOR OF DIGESTION TO A TEMPERATURE WHEREBY WHEN SUCH HEATED LIQUID IS MIXED WITH THE CONTENTS OF THE GARBAGE DIGESTION ZONE THE TEMPERATURE OF SAID CONTENTS IS APPROXIMATELY THE OPTIMUM FOR DIGESTION, RETURNING OVERFLOW DIGESTER LIQUOR FROM SAID GARBAGE DIGESTION ZONE TO SAID SEWAGE SLUDGE DIGESTION ZONE FOR REMIXTURE WITH AND CONDITIONING SIMILARLY TO THE DIGESTER LIQUO RIN SAID SEWAGE SLUDGE DIGESTION ZONE, DISCHARBING OVERFLOW LIQUOR AND DIGESTED SLUDGE FROM SAID SEWATE SLUDGE DIGESTION ZONE, AND DISCHARGING NON-DIGESTIBLE RESIDUE FROM SAID GARBAGE DIGESTION ZONE.
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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) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |