US3755135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric demineralizing apparatus
Assignee: Individual
•
Filing: 1971-01-20
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Granted: 1973-08-28
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Expires: 1991-01-20
Abstract
Abstract An electric demineralizing apparatus and method in which porous electrodes of the same composition are located in compartments on opposite sides of an ion permeable membrane and the electrolyte flows through the electrodes and along the membrane. When a D.C. potential is applied across the electrodes, waste water is produced in one compartment and product water is produced in the other compartment. The D.C. power source drives electrons into one set of electrodes and extracts electrons from the other set of electrodes.
Inventors
- 👤 A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:38
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/4604; B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/48; C02F1/469; C02F1/4693; C02F1/28; C02F1/283; C02F1/461; C02F1/46104; C02F1/46109; C02F1/46114; C02F1/4695; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4611; C02F2201/46115; C02F2201/4612; C02F2201/46125; C02F2201/4613
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
20 words
In an apparatus as defined in claim 1, said membrane being permeable to anions and said electrodes being cation responsive.
Claim 2
Dependent Claim
38 words
In an apparatus as defined in claim 2 wherein the negative side of said potential applying means being connected to the adsorbing electrode and the positive side of said potential applying means being connected to the desorbing electrode.
Claim 3
Dependent Claim
20 words
In an apparatus as defined in claim 1, said membrane being permeable to cations and said electrodes being anion responsive.
Claim 4
Dependent Claim
38 words
In an apparatus as defined in claim 2 wherein the negative side of said potential applying means being connected to the desorbing electrode and the positive side of said potential applying means being connected to the adsorbing electrode.
Claim 5
Dependent Claim
31 words
In an apparatus as defined in claim 1 wherein each of said electrodes comprise carbon particles to which an ion exchange fluid material is applied and then polymerized to make insoluble.
Claim 6
Dependent Claim
21 words
In an apparatus as defined in claim 6 wherein the surface of said particles are first oxidized with an acid mixture.
Claim 7
Dependent Claim
33 words
In an apparatus as defined in claim 1 wherein said potential applying means comprises means for reversing the charge applied to said electrodes to reverse the adsorbing and desorbing action of said electrodes.
Claim 8
Dependent Claim
38 words
In an apparatus as defined in claim 1 wherein said potential applying means comprises a source of electrical potential, and separate wire terminals extending into each of said electrodes and connected to opposite sides of said potential source.
Claim 9
Dependent Claim
36 words
In an apparatus as defined in claim 1 wherein said connecting means comprise valve means for flowing said fluid in one direction through one of said electrodes and in the opposite direction through the other electrode.
Claim 10
Dependent Claim
31 words
In an apparatus as defined in claim 1 wherein each of said electrodes comprises particles having beads interspersed therebetween responsive to ions of the same charge as pass through said membrane.
Claim 11
Dependent Claim
39 words
In an apparatus as defined in claim 2 wherein each of said electrodes comprises cation responsive particles, and anion exchange beads smaller than said particles and interspersed between said particles to increase the mobility of anions toward said membrane.
Claim 12
Dependent Claim
30 words
In an apparatus as defined in claim 11 wherein said particles and beads are disposed in said compartment in substantially layer form with said beads also interspersed between said particles.
Claim 13
Dependent Claim
33 words
In an apparatus as defined in claim 13 wherein said potential applying means comprises a wire terminal in each compartment, each terminal being in electrical contact with all said particles in said compartment.
Claim 14
Dependent Claim
27 words
In an apparatus as defined in claim 1 wherein said connecting means comprise valve means for reversing the direction of flow of said fluid through said electrodes.
Claim 15
Dependent Claim
102 words
In an apparatus as defined in claim 1 having a plurality of membranes in addition to said one membrane to form a stack of membranes, each of said membranes having a compartment on each side thereof containing a permeable electrode responsive to counter ions, means for connecting all said compartments to said fluid, said potenTial applying means comprising a plurality of positive terminals connected in parallel to all the electrodes in a set on one side of said membranes and a plurality of negative terminals connected in parallel to all the electrodes in another set on the other side of said membranes.
Claim 16
Dependent Claim
22 words
In an apparatus as defined in claim 16 wherein said potential applying means comprises means for reversing the charge on said electrodes.
Claim 17
Dependent Claim
29 words
In an apparatus as defined in claim 16 wherein said connecting means comprise valve means for reversing the direction of flow of said fluid through all of said electrodes.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |