US5135654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating fluids
Assignee: KDF Fluid Treatment Inc
•
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 22:03
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.
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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) | 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 |