Patent US4780215A successfully refreshed from Google Patents.
US4780215A
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US
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Water purification device
Assignee: CARLSON IRENE L
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Filing: 1987-06-08
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Granted: 1988-10-25
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Expires: 2007-06-08
Abstract
Abstract A process for purifying well water is described involving the injection of an ozone enriched stream of air, generated by passing air through an electric arc, beneath the surface of the water under conditions suitable for oxidizing soluble iron and sulfur compounds present in the water to an insoluble state. Solids thereby formed are subsequently removed by filtration. The treatment process may either be performed within the well itself, or the well water may be removed and then treated.
Inventors
- 👤 Russell L. Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:26
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/78
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A process for substantially removing soluble iron and sulfur compounds from well water comprising forming ozone enriched air by passing a stream of air through an electric arc, thereafter passing the ozone enriched stream beneath the surface of water contained in a water well during a treatment period sufficient to oxidize said compounds to a substantially insoluble state, and thereafter separating the resulting insoluble compounds from the treated water by removing the treated water from the water well and passing it through a filter.
Claim 2
Dependent Claim
84 words
A process for substantially removing soluble iron and sulfur compounds from well water comprising forming ozone enriched air by passing a stream of air through an electric arc, thereafter passing the ozone enriched stream beneath the surface of water contained in a water well during a treatment period sufficient to oxidize said compounds to a substantially insoluble state, and thereafter separating the resulting insoluble compounds from the treated water by removing the treated water from the water well and passing it through a filter.
Claim 3
Dependent Claim
36 words
The process of claim 1 in which the concentration of ozone in the water is maintained in the range of from about 0.1 to 1 part per million, on a weight basis, during a treatment period.
Claim 4
Dependent Claim
21 words
The process of claim 1 in which the filter used to remove the insoluble compounds employs cellulose as the filter medium.
Claim 5
Dependent Claim
28 words
The process of claim 1 in which the water well is lined with a metal casing, the interior of which is protected by a plastic sleeve or film.
Claim 6
Dependent Claim
30 words
The process of claim 1 in which the ozone-enriched air is passed beneath the surface of said well water through an air line which includes a length of metal pipe.
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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |