US3779913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treatment
Assignee: Individual
•
Filing: 1972-06-06
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Granted: 1973-12-18
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Expires: 1992-06-06
Abstract
Abstract To oxidate materials in water, a chamber is filled with air. Thereafter, raw water is pumped in, thus, compressing the air. Then the air from the top of the vessel is pumped to an air diffusion plate at the bottom. The operation is continued as a batch operation for the desired length of time and, thereafter, the treated water removed from the chamber.
Inventors
- 👤 W Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1278; C02F3/1289; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; C02F1/00; C02F1/58; C02F1/62; C02F1/64; C02F1/645; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/27
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
29 words
The invention as defined in claim 1 with an additional limitation of g. said predetermined time being at least about five minutes and not more than about 60 minutes.
Claim 2
Dependent Claim
19 words
The invention as defined in claim 1 wherein g. the vessel is initially filled with air at atmospheric pressure.
Claim 3
Dependent Claim
20 words
The invention as defined in claim 1 wherein g. the air is under pressure, said air not exceeding 1,500 psi.
Claim 4
Dependent Claim
21 words
The inVention as defined in claim 1 wherein g. the air is compressed to a pressure no greater than 3,000 psi.
Claim 5
Dependent Claim
26 words
The invention as defined in claim 1 wherein g. the vessel is not vented to atmospheric pressure before the draining of the treated water is commenced.
Claim 6
Dependent Claim
41 words
The invention as defined in claim 1 wherein the raw water being treated contains about 400 mg/l hydrogen sulfide and treatment pressure is 200 psi and the treatment time is 15 minutes, the air volume being equal to the water volume.
Claim 7
Dependent Claim
35 words
The invention as defined in claim 1 wherein the water being treated contains about 100 mg/l soluable iron and the treatment time is 10 minutes and the air volume is one half the water volume.
Claim 8
Dependent Claim
38 words
The invention as defined in claim 1 wherein the water being treated is sewage and the treatment pressure is 400 psi and the treatment time is 15 minutes and the air volume is three times the water volume.
Claim 9
Dependent Claim
19 words
The invention as defined in claim 2 wherein j. the vessel is initially filled with air at atmospheric pressure.
Claim 10
Dependent Claim
26 words
The invention as defined in claim 2 wherein j. the vessel is not vented to atmospheric pressure before the draining of the treated water is commenced.
Claim 11
Dependent Claim
20 words
The invention as defined in claim 11 wherein k. the air is under pressure, said air not exceeding 1,500 psi.
Claim 12
Dependent Claim
21 words
The invention as defined in claim 12 wherein m. the air is compressed to a pressure no greater than 3,000 psi.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |