US4378276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic treatment of water
Assignee: CURE PATENT RIGHTS TRUST DOUGLAS A SYKES TRUSTEE
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Filing: 1981-04-27
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Granted: 1983-03-29
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Expires: 2001-04-27
Abstract
Abstract Solids precipitate out of an aqueous solution after it has passed through a negatively charged tubular steel electrode and then through the annular space between the negatively charged electrode and a positively charged tubular aluminum electrode.
Inventors
- 👤 James J. Liggett, deceased
- 👤 executrix by Lydia M. Liggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:48
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/463; C02F1/001; C02F2201/00; C02F2201/002; C02F2201/003; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4616; C02F2201/4617
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
The method of purifying water, comprising the steps of mounting a first tubular electrode within a second tubular electrode in mutual concentric spaced relationship, maintaining said first electrode at a negative potential relative to said second electrode, flowing said water in an axial direction through said first tubular electrode from one end to the other, then flowing said water in a reverse direction through the space between said first and second tubular electrodes, and then separating solids entrained in said water from said water.
Claim 2
Independent Claim
84 words
The method of purifying water, comprising the steps of mounting a first tubular electrode within a second tubular electrode in mutual concentric spaced relationship, maintaining said first electrode at a negative potential relative to said second electrode, flowing said water in an axial direction through said first tubular electrode from one end to the other, then flowing said water in a reverse direction through the space between said first and second tubular electrodes, and then separating solids entrained in said water from said water.
Claim 3
Dependent Claim
31 words
The method of purifying water according to claim 1 wherein said water is at ground potential, comprising the further step of maintaining said first electrode negative with respect to ground potential.
Claim 4
Dependent Claim
23 words
The method of purifying water according to claim 2, wherein said anode electrode has a higher electrochemical equivalent than does said cathode electrode.
Claim 5
Dependent Claim
22 words
The method of purifying water according to claim 3, wherein said cathode electrode is stainless steel, and said anode electrode is aluminum.
Claim 6
Dependent Claim
30 words
The method of purifying water according to claim 1 wherein said cathode and anode electrodes are connected to a low impedence source of unidirectional voltage to establish said electric field.
Claim 7
Independent Claim
63 words
The method of purifying water, comprising the steps of flowing said water through a first tubular electrode and through the annular space between said first electrode and a second tubular electrode surrounding said first electrode, and maintaining said first electrode at a negative potential relative to said second electrode, whereby soluble impurities entrained in said water are caused to precipate out of solution.
Claim 8
Independent Claim
63 words
The method of purifying water, comprising the steps of flowing said water through a first tubular electrode and through the annular space between said first electrode and a second tubular electrode surrounding said first electrode, and maintaining said first electrode at a negative potential relative to said second electrode, whereby soluble impurities entrained in said water are caused to precipate out of solution.
Claim 9
Dependent Claim
24 words
The method of purifying water according to claim 6 wherein said water flows through said first tubular electrode before flowing through said annular space.
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) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |