US4337136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for purifying water
Assignee: Individual
•
Filing: 1981-03-02
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Granted: 1982-06-29
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Expires: 2001-03-02
Abstract
Abstract A pair of electrodes formed of silver-copper alloy depend from the bottom wall of a floating container. The latter is arranged to float on the surface of a body of water to be treated and contains a battery which is connected in circuit with the electrodes through a timer switch and a current reversing switch. Passage of a direct current across the electrodes ionizes the water and the silver and copper ions destroy and prevent the growth of bacteria and algae.
Inventors
- 👤 Vincent M. F. Dahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:27
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; C; C02; C02F; C02F1/00; C02F1/46; C02F1/4606; C02F1/461; C02F1/46104; C02F1/46109; C02F2001/46133; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4612; C02F2201/46125; C02F2201/4613; C02F2201/4615; C02F2201/4616; C02F2201/46165; C02F2303/00; C02F2303/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A self-contained purifying device for a body of water comprising: a container adapted to float on the surface of the water, a pair of spaced electrodes depending from said container, each of said electrodes comprising an alloy of silver and copper, and a direct current electric circuit connected between said electrodes, said circuit including a current source contained in said container, said circuit causing an ionizing current to pass between said electrodes whereby to destroy bacteria and algae in the water, and wherein said alloy comprises about 991/2 percent copper and 1/2 percent silver by weight.
Claim 2
Dependent Claim
96 words
A self-contained purifying device for a body of water comprising: a container adapted to float on the surface of the water, a pair of spaced electrodes depending from said container, each of said electrodes comprising an alloy of silver and copper, and a direct current electric circuit connected between said electrodes, said circuit including a current source contained in said container, said circuit causing an ionizing current to pass between said electrodes whereby to destroy bacteria and algae in the water, and wherein said alloy comprises about 991/2 percent copper and 1/2 percent silver by weight.
Claim 3
Dependent Claim
148 words
A self-contained purifying device for a body of water comprising: a container adapted to float on the surface of the water, a pair of spaced elongate electrodes depending from said container, each of said electrodes comprising an alloy of silver and copper, each of said electrodes having a plurality of faces, means for securing the upper ends of said electrodes to the bottom of said container, said electrodes being rotatably adjustable whereby to present different ones of said faces of one of said electrodes to different ones of said faces of the other of said electrodes, and an electric circuit connected between said electrodes, said circuit including a battery mounted in said container, said circuit causing an ionizing current to pass between said electrodes whereby to destroy bacteria and algae in the water, and wherein said alloy comprises about 991/2 percent copper and 1/2 percent silver by weight.
Claim 4
Dependent Claim
148 words
A self-contained purifying device for a body of water comprising: a container adapted to float on the surface of the water, a pair of spaced elongate electrodes depending from said container, each of said electrodes comprising an alloy of silver and copper, each of said electrodes having a plurality of faces, means for securing the upper ends of said electrodes to the bottom of said container, said electrodes being rotatably adjustable whereby to present different ones of said faces of one of said electrodes to different ones of said faces of the other of said electrodes, and an electric circuit connected between said electrodes, said circuit including a battery mounted in said container, said circuit causing an ionizing current to pass between said electrodes whereby to destroy bacteria and algae in the water, and wherein said alloy comprises about 991/2 percent copper and 1/2 percent silver by weight.
References Cited (Backward Citations)
US541335A
Cited
US614890A
Cited
US2121875A
Cited
US2046467A
Cited
US3092566A
Cited
US3598536A
Cited
US3752747A
Cited
US3684460A
Cited
US3792979A
Cited
US3923632A
Cited
US4241025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |