Patent US5135654A successfully refreshed from Google Patents.
US5135654A
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US
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Method for treating fluids
Assignee: KDF Fluid Treatment Inc
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Filing: 1991-09-24
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Granted: 1992-08-04
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Expires: 2011-09-24
Abstract
Abstract A fluid treating method for treating fluid to reduce the concentration of undesirable metal constitutents contained therein is disclosed. The method utilizes a bed of metal particulate matter. The metal particulate matter comprises copper. Preferably, the metal particulate also contains zinc and can be in the form of an alloy. The fluid treated is often water, preferably, drinking water. Among the metals that may be effected by the present method are aluminum, arsenic, barium, cadmium, chromium, copper, gold, iron, lead, mercury, selenium and silver.
Inventors
- 👤 Don E. Heskett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:17
CPC Classifications
C; C02; C02F; C02F9/00; C02F9/20; C02F1/00; C02F1/70; C02F1/705; C02F1/28; C02F1/281; C02F1/50; C02F1/505; C02F2101/00; C02F2101/10; C02F2101/103; C02F2201/00; C02F2201/002; C02F2201/006; C02F2303/00; C02F2303/18; C02F2303/185
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A method of treating drinking water containing undesirable inorganic constituents which include chlorine to reduce the concentration of said chlorine in said inorganic constituents having a first redox potential, said method comprising passing said drinking water containing chlorine through a bed of metal particles, said metal 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 drinking water is in contact with said metal particles, said metal particles selected from the group consisting of zinc and copper.
Claim 2
Independent Claim
100 words
A method of treating drinking water containing undesirable inorganic constituents which include chlorine to reduce the concentration of said chlorine in said inorganic constituents having a first redox potential, said method comprising passing said drinking water containing chlorine through a bed of metal particles, said metal 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 drinking water is in contact with said metal particles, said metal particles selected from the group consisting of zinc and copper.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said metal particles are zinc.
References Cited (Backward Citations)
US553383A
Cited
US1428618A
Cited
US2194056A
Cited
US2204898A
Cited
US2552709A
Cited
US3027321A
Cited
US3294680A
Cited
US3575853A
Cited
US3857704A
Cited
US3697567A
Cited
US3905827A
Cited
US3873581A
Cited
US3788982A
Cited
US3766036A
Cited
US3922224A
Cited
US3802910A
Cited
JPS4943472A
Cited
US4005011A
Cited
US3976571A
Cited
JPS5085570A
Cited
US4078040A
Cited
US4028236A
Cited
JPS5125476A
Cited
FR2291156A1
Cited
JPS5197251A
Cited
US3933635A
Cited
US4108770A
Cited
US3989623A
Cited
US4094777A
Cited
US4026797A
Cited
US4219419A
Cited
US4382865A
Cited
US4303441A
Cited
US4421652A
Cited
US4414115A
Cited
US4521387A
Cited
US4642192A
Cited
US4871710A
Cited
JPS63256177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |