US3268441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water recovery by electrodialysis
Assignee: Veolia WTS Systems USA Inc
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Filing: 1963-05-21
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Granted: 1966-08-23
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Expires: 1983-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robert W Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; C; C02; C02F; C02F1/00; C02F1/46; C02F1/469; C02F1/001; C02F1/28; C02F1/283; C02F1/42; C02F1/44; C02F1/4693; C02F2103/00; C02F2103/005; C02F2303/00; C02F2303/04; C02F9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A PROCESS OF RECOVERING POTABLE WATER FROM RAW URINE COMPRISING THE STEPS OF: (A) REACTING AT LEAST A PORTION OF THE DISSOLVED UREA OF SAID RAW URINE BY THE ADDITION OF OXALIC ACID TO FORM A PERCIPITATE OF UREA OXALATE, (B) FILTERING THE RESULTING MIXTURE TO REMOVE THE UREA OXALATE AND OTHER SUSPENDED MATERIAL; (C) TREATING THE RESULTING LIQUID WITH ACTIVATED CHARCOAL TO SUBSTANTIALLY REMOVE REMAINING ORGANIC COMPONENTS THEREFROM. (D) PASSING AT LEAST A PROTION OF THE RESULTING ORGANICFREE LIQUID THROUGH THE DESALTING CHAMBERS OF AN ION-EXCHANGE ELECTRODIALYSIS UNIT TO REMOVE DISSSOLVED SALTS THEREFROM, AND (E) TREATING THE SALT WASTE STREAM FROM THE CONCENTRATING CHAMBERS OF SAID ELECTRODIALYSIS UNIT BY A MEMBRANE PERMEATION PROCESS TO OBTAIN ADDITONAL SALT-FREE WATER THEREFROM.
References Cited (Backward Citations)
US3127243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |