US3909402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purification device
Assignee: Gartner Research and Development Co
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Filing: 1972-04-13
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Granted: 1975-09-30
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Expires: 1992-04-13
Abstract
Abstract A water purifier is provided comprising a vertically disposed, elongated vessel containing a granular adsorbent and having retention means therefor at opposite ends thereof. Inlet and outlet conduits are arranged to provide upward flow of water through the adsorbent and the retention means at the upper end is a fine filter, having sufficient resistance to flow so that a back pressure from about 5 to about 20 psi prevails in the vessel when water at ambient temperature is passed through the vessel at a rate of 5 gallons per hour per square inch of said upper end retention means. Preferably, the lower end retention means is also a fine filter providing at least equivalent resistance to flow.
Inventors
- 👤 William Joseph Gartner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:26
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283; C02F2201/00; C02F2201/002; C02F2201/006
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
128 words
A WATER PURIFER SUITABLR FOR REMOVING CHLORINE FROM WATER COMPRISING A VERTICALLY DISPOSED, ELONGATED VESSEL HAVING AN INLET AT THE BOTTOM THEREOF AND A OUTLET AT THE TOP THEREOF, INTENTION MEANS FOR A GRANULAR ABSORBENT NEAR THE INLET OF SAID VESSEL AND NEAR THE OUTLET OF SAID VESSEL, AND A GRANULAR ABSORBENT COMPRISING ACTIVATED CARBON BETWEEN SAID RESPECTIVE RETENTION MEANS, SAIDD RETENTION MEANS NEAR SAID OUTLET COMPRISING A FILTER ELEMENT, SAID FILTER ELEMENT HAVING SUFFICIENT TO THE FLOW OF WATER THERETHROUGH SO THAT A BACK PRESSURE FROM ABOUT 5 TO ABOUT 20 PSI PREVAILS IN SAID VESSEL WHEN WATER AT AMBIENT TEMPERATURES IS PASSED OUTWARDLY THROUGH SAID OUTLET RETENTION MEANS AT A RATE OF 5 GALLONS PER HOUR PER SQUARE INCH OF SAID RETETION MEANS NEAR SAID OUTLET.
Claim 2
Dependent Claim
128 words
A WATER PURIFER SUITABLR FOR REMOVING CHLORINE FROM WATER COMPRISING A VERTICALLY DISPOSED, ELONGATED VESSEL HAVING AN INLET AT THE BOTTOM THEREOF AND A OUTLET AT THE TOP THEREOF, INTENTION MEANS FOR A GRANULAR ABSORBENT NEAR THE INLET OF SAID VESSEL AND NEAR THE OUTLET OF SAID VESSEL, AND A GRANULAR ABSORBENT COMPRISING ACTIVATED CARBON BETWEEN SAID RESPECTIVE RETENTION MEANS, SAIDD RETENTION MEANS NEAR SAID OUTLET COMPRISING A FILTER ELEMENT, SAID FILTER ELEMENT HAVING SUFFICIENT TO THE FLOW OF WATER THERETHROUGH SO THAT A BACK PRESSURE FROM ABOUT 5 TO ABOUT 20 PSI PREVAILS IN SAID VESSEL WHEN WATER AT AMBIENT TEMPERATURES IS PASSED OUTWARDLY THROUGH SAID OUTLET RETENTION MEANS AT A RATE OF 5 GALLONS PER HOUR PER SQUARE INCH OF SAID RETETION MEANS NEAR SAID OUTLET.
Claim 3
Dependent Claim
35 words
The water purifier of claim 1 wherein said retention means near said inlet has a resistance to the flow of water therethrough at least as great as that of said retention means near said outlet.
Claim 4
Dependent Claim
43 words
The water purifier of claim 2 wherein each of said retention means comprises a plurality of layers of filter paper of at least two degrees of fineness, the coarser filter papers of each retention means being upstream of the finer filter papers thereof.
Claim 5
Dependent Claim
116 words
A water purifier cartridge suitable for removing chlorine from water comprising an elongated, open-ended vessel having an inlet end and an outlet end, having retention means for a granular adsorbent near each of said ends and having a granular adsorbent comprising activated carbon between said respective retention means, at least the retention means at said outlet end comprising a filter element, said filter element providing sufficient resistance to water flow therethrough so that a back pressure from about 5 to about 20 psi prevails in said cartridge when water at ambient temperatures is passed outwardly through said last-named retention means at a rate of 5 gallons per hour per square inch of said last-named reTention means.
Claim 6
Dependent Claim
116 words
A water purifier cartridge suitable for removing chlorine from water comprising an elongated, open-ended vessel having an inlet end and an outlet end, having retention means for a granular adsorbent near each of said ends and having a granular adsorbent comprising activated carbon between said respective retention means, at least the retention means at said outlet end comprising a filter element, said filter element providing sufficient resistance to water flow therethrough so that a back pressure from about 5 to about 20 psi prevails in said cartridge when water at ambient temperatures is passed outwardly through said last-named retention means at a rate of 5 gallons per hour per square inch of said last-named reTention means.
Claim 7
Dependent Claim
53 words
The water purifier cartridge of claim 4 wherein each of said retention means comprises a plurality of filter papers of at least two degrees of fineness, one of the retention means having its coarser papers adjacent said granular adsorbent and the other retention means having its finer filter papers adjacent said granular adsorbent.
Claim 8
Dependent Claim
53 words
The water purifier cartridge of claim 5 wherein each of said retention means comprises at least two sheets of fine filter paper, each sheet having a rate of water flow therethrough at ambient temperatures of about 340 gallons per minute per square foot at a pressure drop of 20 pounds per square inch.
Claim 9
Independent Claim
108 words
A method of removing chlorine from water which comprises passing said water through a closed system comprising, in order, an inlet filter, a granular adsorbent for water impurities comprising activated carbon and an outlet filter, at a rate of from about 1 to about 10 gallons of water per hour per square inch of outlet filter, said outlet filter having sufficient resistance to the flow of water therethrough so that a back pressure from about 5 to about 20 psi prevails in said granular adsorbent when water at ambient temperatures is passed therethrough at a rate of 5 gallons per hour per square inch of outlet filter area.
Claim 10
Independent Claim
108 words
A method of removing chlorine from water which comprises passing said water through a closed system comprising, in order, an inlet filter, a granular adsorbent for water impurities comprising activated carbon and an outlet filter, at a rate of from about 1 to about 10 gallons of water per hour per square inch of outlet filter, said outlet filter having sufficient resistance to the flow of water therethrough so that a back pressure from about 5 to about 20 psi prevails in said granular adsorbent when water at ambient temperatures is passed therethrough at a rate of 5 gallons per hour per square inch of outlet filter area.
Claim 11
Dependent Claim
19 words
The method of claim 7 wherein said water is passed through said closed system in a vertical upward direction.
Claim 12
Dependent Claim
34 words
The method of claim 8 wherein said water is passed through said closed system at a rate from about 3 to about 5 gallons of water per hour per square inch of outlet filter.
References Cited (Backward Citations)
US2582388A
Cited
US2772002A
Cited
US3169112A
Cited
US3327859A
Cited
US3389803A
Cited
US3439809A
Cited
US3529726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |