US3769204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersed growth biological sewage treatment process
Assignee: Oklahoma State University
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Filing: 1972-04-19
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Granted: 1973-10-30
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Expires: 1992-04-19
Abstract
Abstract A DISPERSED GROWTH BIOLOGICAL SECONDARY SEWAGE TREATMENT PROCESS FOR REMOVING DISSOLVED ORGANIC MATERIAL AND SUSPENDED SOLID MATERIAL FROM SEWAGE INCLUDING METABOLIZING THE DISPERSED BIOLOGICAL SOLIDS TO YIELD NEW CELL MATERIAL, CARBON DIOXIDE, AND WATER, SUBJECTING THE METABOLIZED MEDIUM TO HYDROCLONIC FORCES TO SEPARATE THE SAME INTO CLEAN EFFLUENT AND CONCENTRATED BIOLOGICAL SOLIDS, AND TOTAL OXIDIZING THE CONCENTRATED BIOLOGICAL SOLIDS IN A SATURATION ENVIRONMENT.
Inventors
- 👤 D Kincannon
- 👤 L Macuila
- 👤 W Tiederman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:55
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1242; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |