Patent US4642192A successfully refreshed from Google Patents.
US4642192A
Expired / Lapsed
US
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Method of treating fluids
Assignee: KDF Fluid Treatment Inc
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Filing: 1986-05-05
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Granted: 1987-02-10
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Expires: 2006-05-05
Abstract
Abstract A method for treating fluid to remove undesirable constituents contained therein such as chlorine and nitrate constituents is disclosed. The method includes passing fluid containing the undesirable constituents through a bed of metal particulate matter. The metal particulate matter is preferably chosen from metals having favorable redox potentials relative to the redox potentials of the undesirable constituents so as to establish conditions for spontaneous oxidation and reduction reactions between the undesirable constituents and the metal particles.
Inventors
- 👤 Don E. Heskett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:50
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/70; C02F1/705; C02F1/28; C02F1/281; C02F1/72; C02F1/76; C02F2101/00; C02F2101/10; C02F2101/103; C02F2201/00; C02F2201/002; C02F2201/006; C02F2303/00; C02F2303/18; C02F2303/185; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
A method of reducing the concentration of undesirable inorganic chlorine which is present in drinkable water, said undesirable inorganic chlorine having a first redox potential, said method comprising passing said water containing said chlorine through a bed of metal particles, said metal particles comprising copper, said particles having a second redox potential such that relative to said first redox potential conditions are established for spontaneous inorganic oxidation and reduction reactions between said chlorine and said metal particles when said water is in contact with said metal particles.
Claim 2
Independent Claim
87 words
A method of reducing the concentration of undesirable inorganic chlorine which is present in drinkable water, said undesirable inorganic chlorine having a first redox potential, said method comprising passing said water containing said chlorine through a bed of metal particles, said metal particles comprising copper, said particles having a second redox potential such that relative to said first redox potential conditions are established for spontaneous inorganic oxidation and reduction reactions between said chlorine and said metal particles when said water is in contact with said metal particles.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said metal particles further comprise zinc.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein said metal particles comprise a metal alloy of said copper and said zinc.
Claim 5
Dependent Claim
26 words
The method of claim 3 wherein the amount, by weight, of said copper is greater than the amount, by weight, of said zinc in said alloy.
Claim 6
Dependent Claim
12 words
The method of claim 3 wherein said alloy is a brass alloy.
Claim 7
Dependent Claim
17 words
The method of claim 3 wherein said inorganic chlorine is present as hypochlorous acid or salts thereof.
Claim 8
Dependent Claim
34 words
The method of claim 3 wherein said method further comprises the step of adjusting the pH of said water to a desired level prior to passing said water through said bed of metal particles.
Claim 9
Dependent Claim
19 words
The method of claim 3 wherein said method further comprises the step of supplying oxygen to said metal particles.
Claim 10
Dependent Claim
37 words
The method of claim 3 wherein said method further comprises the step of passing said treated water through a conventional treatment process selected from the group consisting of activated carbon, ion-exchange, and reverse osmosis conventional treatment processes.
Claim 11
Dependent Claim
21 words
The method of claim 3 wherein said method further comprises the step of passing said treated water through a filtration medium.
Claim 12
Dependent Claim
11 words
The method of claim 10 wherein said filtration medium is sand.
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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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |