Patent US2651829A successfully refreshed from Google Patents.
Patent US3625883A successfully refreshed from Google Patents.
US3625883A
Expired / Lapsed
US
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Liquid waste treatment process
Assignee: Individual
•
Filing: 1970-07-06
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Granted: 1971-12-07
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Expires: 1990-07-06
Abstract
Abstract An advanced liquid waste treatment process is provided for treating sewage and other liquid waste and having steps including centrifuging the waste through filter mediums to remove solids from the effluent both before and after lagooning the effluent to remove soluble phosphates, nitrates, and the like. The solids removed during the filtration are burned and the final effluent may be sterilized such as by the addition of chlorine.
Inventors
- 👤 Joseph M Valdespino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:18
CPC Classifications
C; C02; C02F; C02F9/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
24 words
The method of treating liquid waste in accordance with claim 1 but including the step of sterilizing said effluent prior to discharging said effluent.
Claim 2
Dependent Claim
20 words
The method of treating liquid waste in accordance with claim 2 in which the step of sterilizing is by chlorination.
Claim 3
Dependent Claim
28 words
The process in accordance with claim 3, but including the step of comminuting said liquid waste prior to said first centrifuging to produce a generally homogeneous liquid waste.
Claim 4
Dependent Claim
29 words
The process in accordance with claim 4 in which said comminuted liquid waste is held in a holding tank means for feeding said waste into said first centrifuging step.
Claim 5
Dependent Claim
22 words
The process in accordance with claim 5 but including the step of removing ash for diSposal following each step of burning solids.
Claim 6
Dependent Claim
19 words
The process in accordance with claim 6 but including the step of periodic removal of vegetation from said lagoon.
Claim 7
Dependent Claim
27 words
The method in accordance with claim 7 in which said steps of burning take place in centrifuges used for centrifuging said liquid waste through said filter medium.
Claim 8
Dependent Claim
23 words
The method in accordance with claim 8 in which said steps of centrifuging include pumping said effluent by the action of the centrifuge.
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |