US3793173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wastewater treatment using electrolysis with activated carbon cathode
Assignee: Individual
•
Filing: 1969-02-03
•
Granted: 1974-02-19
•
Expires: 1989-02-03
Abstract
Abstract An improvement in the electrolytic treatment of wastewater is described in which the reduction of oxygen on an activated carbon cathode is employed to form hydrogen peroxide, which in turn serves to oxidize organic carbon pollutants in the wastewater.
Inventors
- 👤 M Kawahata
- 👤 K Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:53
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/46104; C02F1/46109; C02F1/463; C02F1/467; C02F1/4672; C25; C25B; C25B1/00; C25B1/01; C25B1/28; C25B1/30; C25B9/00; C25B9/13; C25B9/15; C25B9/17; C02F1/46114; C02F1/72; C02F1/722; C02F2001/46133; C02F2001/46152; C02F2001/46157; C02F2001/46161; C02F2001/46166; C02F2201/00; C02F2201/002; C02F2201/003; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4611; C02F2201/4619; C02F2305/00; C02F2305/02; C02F2305/026
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
The process of claim 1 in which the treated wastewater exits from the flow channel saturated with oxygen.
Claim 2
Dependent Claim
28 words
The process of claim 1 in which the anode is of a ferrous metal and Fe(OH)3. X H2O floccules are generated in the wastewater in the flow channel.
Claim 3
Dependent Claim
29 words
The process of claim 1 in which the rate of passing oxygen-containing gas through the cathode to the wastewater is at least about 7 mg of oxygen/liter of wastewater.
Claim 4
Dependent Claim
21 words
The process of claim 1 in which at least 33 Coulombs of electricity is applied per milligram of dissolved organic carbon.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |