Patent US848837A successfully refreshed from Google Patents.
Patent US3035992A successfully refreshed from Google Patents.
US3035992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for cleaning waste water such as sewage water
Assignee: Elektrokemisk AS
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Filing: 1957-01-14
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Granted: 1962-05-22
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Expires: 1977-01-14
Abstract
No abstract record available.
Inventors
- 👤 Leif R Hougen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:32
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/467; C02F1/4672; C02F1/4674; C02F1/465; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4611; C02F2303/00; C02F2303/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A PROCESS FOR THE ELECTROLYTIC CLEANING OF WASTE WATERS CONTAINING ALKALI-PRECIPITABLE IMPURITIES INCLUDING PHOSPHATES WHICH COMPRISES FLOWING A HORIZONTALLY DISPOSED LAYER OF SEA WATER ACROSS AND ABOVE AN ANODE IN THE CONTACT WITH A SUPERNATANT LAYER OF ELECTRICALLY CONDUCTIVE WASTE WATER HAVING A DENSITY LESS THAN THAT OF THE SEA WATER EXTENDING ABOVE AND BELOW A CATHODE, FLOWING THE LAYERS OF WASTE WATER ACROSS AND ABOVE THE CATHODE CONCURRENTLY WITH THE SEA WATER THEREBELOW, BOTH LAYERS BEING FLOWED SLOWLY AND QUIETLY WITHOUT SUBSTANTIAL MIXING, AND ELECTROLYZING THE LAYERS WHILE MAINTAINING A FLOW RATE AND CURRENT DENSITY THAT LIBERATE CHLORINE AT THE ANODE AND LIMIT CHLORINE CONCENTRATION IN THE SEA WATER LAYER TO ABOUT 0.7%, THEREBY PREVENTING THE ESCAPE OF CHLORINE GAS FROM THE SEA WATER LAYER, LIBERATE ALKALI AT THE CATHODE IN AN AMOUNT SUFFICIENT TO MAKE THE WASTE WATER ALKALINE, THEREBY PRECIPITATING ALKALI-PRECIPITABLE IMPURRITIES, AND LIBERATE HYDROGEN AT THE CATHODE TO LIFT TO THE SURFACE OF THE WASTE WATER IMPURITIES PRECIPITATED IN THE WASTE WATER.
Claim 2
Dependent Claim
166 words
A PROCESS FOR THE ELECTROLYTIC CLEANING OF WASTE WATERS CONTAINING ALKALI-PRECIPITABLE IMPURITIES INCLUDING PHOSPHATES WHICH COMPRISES FLOWING A HORIZONTALLY DISPOSED LAYER OF SEA WATER ACROSS AND ABOVE AN ANODE IN THE CONTACT WITH A SUPERNATANT LAYER OF ELECTRICALLY CONDUCTIVE WASTE WATER HAVING A DENSITY LESS THAN THAT OF THE SEA WATER EXTENDING ABOVE AND BELOW A CATHODE, FLOWING THE LAYERS OF WASTE WATER ACROSS AND ABOVE THE CATHODE CONCURRENTLY WITH THE SEA WATER THEREBELOW, BOTH LAYERS BEING FLOWED SLOWLY AND QUIETLY WITHOUT SUBSTANTIAL MIXING, AND ELECTROLYZING THE LAYERS WHILE MAINTAINING A FLOW RATE AND CURRENT DENSITY THAT LIBERATE CHLORINE AT THE ANODE AND LIMIT CHLORINE CONCENTRATION IN THE SEA WATER LAYER TO ABOUT 0.7%, THEREBY PREVENTING THE ESCAPE OF CHLORINE GAS FROM THE SEA WATER LAYER, LIBERATE ALKALI AT THE CATHODE IN AN AMOUNT SUFFICIENT TO MAKE THE WASTE WATER ALKALINE, THEREBY PRECIPITATING ALKALI-PRECIPITABLE IMPURRITIES, AND LIBERATE HYDROGEN AT THE CATHODE TO LIFT TO THE SURFACE OF THE WASTE WATER IMPURITIES PRECIPITATED IN THE WASTE WATER.
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) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |