US3386911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste treatment for phosphorous removal
Assignee: Dorr Oliver Inc
•
Filing: 1966-08-03
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Granted: 1968-06-04
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Expires: 1986-08-03
Abstract
No abstract record available.
Inventors
- 👤 Orris E Albertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:08
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1215; C02F1/00; C02F1/52; C02F1/5236; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A COMBINED CHEMICAL AND BIOLOGICAL PROCESS FOR TREATING LIQUID ORGANIC WASTE MATERIAL CONTAINING PHOSPHOROUS, TO DECREASE THE PHOSPHORUS CONTENT TO A PREDETERMINED MINIMUM CONCENTRATION, COMPRISING THE STEPS OF DOSING THE RAW WASTE MATERIAL WITH A LIMITED AMOUNT OF A CHEMICAL PRECIPITANT FOR PHOSPHORUS SUBSTANTIALLY LESS THAN THE AMOUNT REQUIRED TO REMOVE PHOSPHORUS TO THE PREDETERMINED CONCENTRATION TO FORM AN INSOLUBLE PRECIPITATE OF PHOSPHORUS; SUBJECTING THE DOSED WASTE MATERIAL TO A FIRST SEDIMENTATION TO SEPARATE THE MATERIAL INTO SLUDGE AND AN EFFLUENT; AERATING THE EFFLUENT TO PRODUCE PHOSPHORUS CONSUMING CELL GROWTH, SUBJECTING THE AERATED EFFLUENT TO A SECOND SEDIMENTATION TO REMOVE THE PHOSPHORUS-BEARING BIOLOGICAL SLUDGE AND PRODUCE A FINAL EFFLUENT OF THE PREDETERMINED MINMIUM PHOSPHORUS CONCENTRATION.
Claim 2
Dependent Claim
115 words
A COMBINED CHEMICAL AND BIOLOGICAL PROCESS FOR TREATING LIQUID ORGANIC WASTE MATERIAL CONTAINING PHOSPHOROUS, TO DECREASE THE PHOSPHORUS CONTENT TO A PREDETERMINED MINIMUM CONCENTRATION, COMPRISING THE STEPS OF DOSING THE RAW WASTE MATERIAL WITH A LIMITED AMOUNT OF A CHEMICAL PRECIPITANT FOR PHOSPHORUS SUBSTANTIALLY LESS THAN THE AMOUNT REQUIRED TO REMOVE PHOSPHORUS TO THE PREDETERMINED CONCENTRATION TO FORM AN INSOLUBLE PRECIPITATE OF PHOSPHORUS; SUBJECTING THE DOSED WASTE MATERIAL TO A FIRST SEDIMENTATION TO SEPARATE THE MATERIAL INTO SLUDGE AND AN EFFLUENT; AERATING THE EFFLUENT TO PRODUCE PHOSPHORUS CONSUMING CELL GROWTH, SUBJECTING THE AERATED EFFLUENT TO A SECOND SEDIMENTATION TO REMOVE THE PHOSPHORUS-BEARING BIOLOGICAL SLUDGE AND PRODUCE A FINAL EFFLUENT OF THE PREDETERMINED MINMIUM PHOSPHORUS CONCENTRATION.
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |